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1 2 >Solved |
Name |
Tags |
Solutions |
Index |
Contest |
Type |
Points |
Tutorial |
Rating Level |
|---|---|---|---|---|---|---|---|---|---|
| 5658 | Sequence | dp sortings | Statement | C | Codeforces Beta Round 13 {13} | PROGRAMMING | Codeforces Beta Round #13 editorial | 2200 | |
| 1741 | First Digit Law | dp math probabilities | Statement | C | Codeforces Beta Round 50 {54} | PROGRAMMING | Codeforces Beta Round #50: Editorial for problem E | 2000 | |
| 540 | Half-decay tree | data structures divide and conquer dp math probabilities | Statement | D | Codeforces Beta Round 62 {68} | PROGRAMMING | 2400 | ||
| 7442 | Round Table Knights | dp math number theory | Statement | C | Codeforces Beta Round 65 (Div. 2) {71} | PROGRAMMING | Разбор задач Codeforces Beta Round #65 (Div. 2) | 1600 | |
| 2130 | Big Maximum Sum | data structures dp greedy implementation math trees | Statement | D | Codeforces Beta Round 67 (Div. 2) {75} | PROGRAMMING | Codeforces Beta Round #67 (Div. 2) Editorial | 2100 | |
| 1093 | Numbers | dp math number theory | Statement | D | Codeforces Beta Round 72 (Div. 1 Only) {83} | PROGRAMMING | разбор E | 2400 | |
| 486 | Flags | dp math matrices | Statement | D | Codeforces Beta Round 76 (Div. 1 Only) {93} | PROGRAMMING | Codeforces Beta Round 76 - задача Е div 1 глазами ее автора. | 2400 | |
| 555 | Lostborn | dp math number theory | Statement | E | Codeforces Beta Round 76 (Div. 1 Only) {93} | PROGRAMMING | Codeforces Beta Round 76 - задача Е div 1 глазами ее автора. | 2600 | |
| 571 | Help Shrek and Donkey | dp games math probabilities | Statement | E | Codeforces Beta Round 78 (Div. 1 Only) {98} | PROGRAMMING | Editorial | 2500 | |
| 4408 | Basketball Team | combinatorics dp math probabilities | Statement | B | Codeforces Beta Round 83 (Div. 1 Only) {107} | PROGRAMMING | Tutorial | 1700 | |
| 9422 | Bag of mice | dp games math probabilities | Statement | D | Codeforces Round 105 (Div. 2) {148} | PROGRAMMING | Codeforces Round #105 (Div. 2): editorial | 1900 | |
| 14086 | Another Problem on Strings | binary search brute force dp math strings two pointers | Statement | C | Codeforces Round 112 (Div. 2) {165} | PROGRAMMING | Codeforces Round #112 (Div. 2) Tutorial | 1600 | |
| 26489 | Tetrahedron | dp math matrices | Statement | E | Codeforces Round 113 (Div. 2) {166} | PROGRAMMING | Codeforces Round #113 (Div. 2) Tutorial | 1500 | |
| 2549 | Wizards and Huge Prize | dp math probabilities | Statement | B | Codeforces Round 114 (Div. 1) {167} | PROGRAMMING | Codeforces Round #114 — Tutorial | 2000 | |
| 345 | Plane of Tanks: Duel | brute force dp math probabilities | Statement | D | Codeforces Round 115 {175} | PROGRAMMING | Codeforces Round #115 — editorial A-E | 2400 | |
| 621 | Gifts | combinatorics dp math probabilities | Statement | E | Codeforces Round 142 (Div. 1) {229} | PROGRAMMING | Codeforces Round #142 Problem Analysis | 2500 | |
| 4506 | Let's Play Osu! | dp math probabilities | Statement | B | Codeforces Round 146 (Div. 1) {235} | PROGRAMMING | Codeforces Round #146 Tutorial | 2100 | |
| 990 | Number Challenge | combinatorics dp implementation math number theory | Statement | E | Codeforces Round 146 (Div. 1) {235} | PROGRAMMING | Codeforces Round #146 Tutorial | 2600 | |
| 693 | Piglet's Birthday | dp math probabilities | Statement | E | Codeforces Round 152 (Div. 2) {248} | PROGRAMMING | Разбор задач Codeforces Round #152 | 2700 | |
| 605 | Donkey and Stars | data structures dp geometry math sortings | Statement | D | Codeforces Round 152 (Div. 1) {249} | PROGRAMMING | Разбор задач Codeforces Round #152 | 2600 | |
| 1575 | Little Elephant and Broken Sorting | dp math probabilities | Statement | D | Codeforces Round 157 (Div. 1) {258} | PROGRAMMING | Codeforces Round #157 — Editorial | 2600 | |
| 1646 | Maxim and Restaurant | dp math probabilities | Statement | B | Codeforces Round 160 (Div. 1) {261} | PROGRAMMING | Codeforces Round #160 tutorial | 2100 | |
| 718 | Cows and Cool Sequences | dp math number theory | Statement | D | Codeforces Round 174 (Div. 1) {283} | PROGRAMMING | Editorial for Codeforces #174 | 2400 | |
| 473 | Random Ranking | dp math probabilities | Statement | E | Codeforces Round 183 (Div. 1) {303} | PROGRAMMING | Codeforces Round #183 Editorial | 2800 | |
| 265 | Counting Skyscrapers | dp math probabilities | Statement | E | MemSQL start[c]up Round 2 - online version {335} | PROGRAMMING | MemSQL start[c]up Round 2 -- Editorial | 2900 | |
| 10806 | Bear and Prime Numbers | binary search brute force data structures dp implementation math number theory | Statement | C | Codeforces Round 226 (Div. 2) {385} | PROGRAMMING | Codeforces Round #226 (Div. 2) — Editorial | 1800 | |
| 2806 | Upgrading Array | dp greedy math number theory | Statement | D | Codeforces Round 236 (Div. 2) {402} | PROGRAMMING | Editorial Codeforces Round #236 | 2000 | |
| 838 | Valera and Number | bitmasks dp math probabilities | Statement | E | Codeforces Round 252 (Div. 2) {441} | PROGRAMMING | Разбор Codeforces Round #252 (Div. 2) | 2700 | |
| 356 | Jzzhu and Squares | dp math number theory | Statement | E | Codeforces Round 257 (Div. 1) {449} | PROGRAMMING | Codeforces Round #257 Editorial | 2900 | |
| 530 | Permanent | dp graph matchings math meet-in-the-middle | Statement | E | Codeforces Round 268 (Div. 1) {468} | PROGRAMMING | 13896 | 3100 | |
| 38163 | Dreamoon and WiFi | bitmasks brute force combinatorics dp math probabilities | Statement | B | Codeforces Round 272 (Div. 2) {476} | PROGRAMMING | 1300 | ||
| 4442 | Valid Sets | dfs and similar dp math trees | Statement | D | Codeforces Round 277 (Div. 2) {486} | PROGRAMMING | Codeforces Round #277(Div. 2) Editorial | 2300 | |
| 8529 | Ilya and Escalator | combinatorics dp math probabilities | Statement | D | Codeforces Round 293 (Div. 2) {518} | PROGRAMMING | Codeforces Round #293 (Div.2) Editorial | 1900 | |
| 2148 | Pluses everywhere | combinatorics dp math number theory | Statement | E | Codeforces Round 295 (Div. 2) {520} | PROGRAMMING | Codeforces Round #295 Editorial (now with bonuses!) | 2500 | |
| 4402 | Anya and Cubes | binary search bitmasks brute force dp math meet-in-the-middle | Statement | E | Codeforces Round 297 (Div. 2) {525} | PROGRAMMING | Codeforces Round #297 (Div.2) Editorial | 2200 | |
| 1675 | Demiurges Play Again | dfs and similar dp math trees | Statement | E | Codeforces Round 300 {538} | PROGRAMMING | Codeforces Round #300 Editorial (+challenges) | 2200 | |
| 543 | Superhero's Job | dfs and similar dp hashing math number theory | Statement | D | VK Cup 2015 - Round 3 (unofficial online mirror, Div. 1 only) {542} | PROGRAMMING | 17697 | 2600 | |
| 14109 | Soldier and Number Game | constructive algorithms dp math number theory | Statement | D | Codeforces Round 304 (Div. 2) {546} | PROGRAMMING | Codeforces Round #304 (Div.2) editorial | 1700 | |
| 3555 | Mike and Foam | bitmasks combinatorics dp math number theory | Statement | C | Codeforces Round 305 (Div. 1) {547} | PROGRAMMING | Codeforces Round #305 Editorial | 2700 | |
| 5899 | Vanya and Scales | brute force dp greedy math meet-in-the-middle number theory | Statement | C | Codeforces Round 308 (Div. 2) {552} | PROGRAMMING | Codeforces #308 (Div. 2) Editorial | 1800 | |
| 735 | Kyoya and Train | dp fft graphs math probabilities | Statement | E | Codeforces Round 309 (Div. 1) {553} | PROGRAMMING | Codeforces Round #309 Editorial | 3300 | |
| 4256 | Arthur and Table | brute force data structures dp greedy math sortings | Statement | C | Codeforces Round 311 (Div. 2) {557} | PROGRAMMING | Codeforces Round #311 (Div.2) Editorial | 1900 | |
| 8456 | Gerald and Giant Chess | combinatorics dp math number theory | Statement | C | Codeforces Round 313 (Div. 1) {559} | PROGRAMMING | Codeforces Round 313 — Extended editoral | 2500 | |
| 4363 | Clique in the Divisibility Graph | dp math number theory | Statement | F | VK Cup 2015 - Finals, online mirror {566} | PROGRAMMING | Editorial for VK Cup 2015 — Finals | 1600 | |
| 844 | Number of Binominal Coefficients | dp math number theory | Statement | D | Codeforces Round 323 (Div. 1) {582} | PROGRAMMING | Codeforces Round #323 Editorial | 3100 | |
| 771 | Wilbur and Trees | dp math probabilities sortings | Statement | D | Codeforces Round 331 (Div. 2) {596} | PROGRAMMING | Codeforces Round #331 Editorial | 2500 | |
| 1470 | Kleofáš and the n-thlon | dp math probabilities | Statement | C | Codeforces Round 333 (Div. 1) {601} | PROGRAMMING | Codeforces Round #333 — editorial | 2400 | |
| 274 | Combining Slimes | dp math matrices probabilities | Statement | G | Wunder Fund Round 2016 (Div. 1 + Div. 2 combined) {618} | PROGRAMMING | Wunder Fund Round 2016 Editorials | 3300 | |
| 1604 | Little Artem and Random Variable | dp implementation math probabilities | Statement | D | VK Cup 2016 - Round 2 {641} | PROGRAMMING | VK Cup 2016 — Раунд 2 (editorial) | 2300 | |
| 756 | Bear and Destroying Subtrees | dp math probabilities trees | Statement | E | VK Cup 2016 - Round 3 {643} | PROGRAMMING | VK Cup 2016 — Round 3 — Editorial | 2600 | |
| 909 | Bears and Juice | dp math meet-in-the-middle | Statement | F | VK Cup 2016 - Round 3 {643} | PROGRAMMING | VK Cup 2016 — Round 3 — Editorial | 2900 | |
| 839 | Four Divisors | dp math number theory | Statement | F | Educational Codeforces Round 12 {665} | PROGRAMMING | Editorial | 2600 | |
| 4516 | Robbers' watch | brute force combinatorics dp math | Statement | A | Codeforces Round 359 (Div. 1) {685} | PROGRAMMING | Codeforces Round #359 Editorial | 1700 | |
| 2318 | PLEASE | combinatorics dp implementation math matrices | Statement | C | Codeforces Round 362 (Div. 1) {696} | PROGRAMMING | Codeforces Round #362 (Editorial) | 2200 | |
| 1480 | LRU | bitmasks dp math probabilities | Statement | C | Codeforces Round 363 (Div. 1) {698} | PROGRAMMING | Solution | 2700 | |
| 2856 | Gosha is hunting | brute force data structures dp flows math probabilities sortings | Statement | E | Codeforces Round 381 (Div. 1) {739} | PROGRAMMING | 48582 | 2900 | |
| 1150 | PolandBall and Many Other Balls | combinatorics divide and conquer dp fft math number theory | Statement | G | 8VC Venture Cup 2017 - Elimination Round {755} | PROGRAMMING | 8VC Venture Cup 2017 — Elimination Round [Editorial] | 3100 | |
| 2965 | Ability To Convert | constructive algorithms dp greedy math strings | Statement | D | Codeforces Round 392 (Div. 2) {758} | PROGRAMMING | Codeforces Round #392 (Div. 2) Editorial | 1900 | |
| 119 | Math, math everywhere | brute force dp math meet-in-the-middle number theory | Statement | G | Codeforces Round 397 by Kaspersky Lab and Barcelona Bootcamp (Div. 1 + Div. 2 combined) {765} | PROGRAMMING | Codeforces Round #397 Editorial | 2800 | |
| 3614 | Mahmoud and a xor trip | bitmasks constructive algorithms data structures dfs and similar dp math trees | Statement | E | Codeforces Round 396 (Div. 2) {766} | PROGRAMMING | Codeforces round #396 editorial | 2200 | |
| 3562 | Jon and Orbs | dp math probabilities | Statement | D | Divide by Zero 2017 and Codeforces Round 399 (Div. 1 + Div. 2, combined) {768} | PROGRAMMING | Editorial Divide by Zero and Codeforces Round #399 (Div. 1+2, combined) | 2100 | |
| 1494 | Vulnerable Kerbals | constructive algorithms dp graphs math number theory | Statement | C | VK Cup 2017 - Round 2 {772} | PROGRAMMING | VK Cup Round 2 + Codeforces Round #409 Tutorial | 2400 | |
| 396 | Test Data Generation | combinatorics divide and conquer dp fft math number theory | Statement | F | VK Cup 2017 - Round 3 {773} | PROGRAMMING | VK Cup 2017 Round 3 + Codeforces Round #412 -- Tutorial | 3400 | |
| 3948 | Anton and School - 2 | combinatorics dp math number theory | Statement | D | Codeforces Round 404 (Div. 2) {785} | PROGRAMMING | Editorial | 2200 | |
| 5113 | Divide by Three | dp greedy math number theory | Statement | C | Educational Codeforces Round 18 {792} | PROGRAMMING | Educational Codeforces Round 18 - Editorial | 2000 | |
| 407 | Send the Fool Further! (hard) | dfs and similar dp math trees | Statement | J3 | Helvetic Coding Contest 2017 online mirror (teams allowed, unrated) {802} | PROGRAMMING | helvetic-coding-contest-2017-editorial.pdf | 2400 | |
| 364 | Send the Fool Further! (hard) | dfs and similar dp math trees | Statement | L | Helvetic Coding Contest 2017 online mirror (teams allowed, unrated) {802} | PROGRAMMING | helvetic-coding-contest-2017-editorial.pdf | 2800 | |
| 3308 | My pretty girl Noora | brute force dp greedy math number theory | Statement | D | Codeforces Round 422 (Div. 2) {822} | PROGRAMMING | Codeforces Round #422 (Div. 2) Editorial | 1800 | |
| 402 | Perpetual Motion Machine | constructive algorithms dp graphs implementation math trees | Statement | E | Codeforces Round 424 (Div. 1, rated, based on VK Cup Finals) {830} | PROGRAMMING | Codeforces Round #424 Editorial | 3100 | |
| 3682 | Winter is here | combinatorics dp math number theory | Statement | D | Codeforces Round 428 (Div. 2) {839} | PROGRAMMING | Codeforces Round #428 editorial | 2200 | |
| 9840 | Maximum splitting | dp greedy math number theory | Statement | C | Technocup 2018 - Elimination Round 2 {870} | PROGRAMMING | Editorial Codeforces Round 440 Div.1+Div.2 (and Technocup 2018 — Elimination Round 2) | 1300 | |
| 15093 | Pride | brute force dp greedy math number theory | Statement | A | Codeforces Round 446 (Div. 1) {891} | PROGRAMMING | Codeforces Round #446 Editorial | 1600 | |
| 4335 | Counting Arrays | combinatorics dp math number theory | Statement | E | Educational Codeforces Round 33 (Rated for Div. 2) {893} | PROGRAMMING | 55989 | 2000 | |
| 3949 | Unusual Sequences | bitmasks combinatorics dp math number theory | Statement | D | Codeforces Round 450 (Div. 2) {900} | PROGRAMMING | Codeforces Round #450(Div. 2). Editorial. | 2100 | |
| 2755 | New Year and Arbitrary Arrangement | dp math probabilities | Statement | D | Good Bye 2017 {908} | PROGRAMMING | Good Bye 2017 Editorial | 2200 | |
| 845 | Strongly Connected Tournament | dp graphs math probabilities | Statement | F | Hello 2018 {913} | PROGRAMMING | Tutorial | 2700 | |
| 1528 | Stranger Trees | dp math matrices trees | Statement | D | Codeforces Round 459 (Div. 1) {917} | PROGRAMMING | Codeforces Round #459 Editorial | 2600 | |
| 2966 | Mahmoud and Ehab and yet another xor task | bitmasks dp math matrices | Statement | F | Codeforces Round 473 (Div. 2) {959} | PROGRAMMING | Codeforces round #473 editorial | 2600 | |
| 2267 | Kuro and GCD and XOR and SUM | binary search bitmasks brute force data structures dp dsu greedy math number theory strings trees | Statement | D | Codeforces Round 482 (Div. 2) {979} | PROGRAMMING | 1750.0 | Codeforces Round #482 (Div. 2) Editorial | 2200 |
| 3096 | Perfect Groups | dp math number theory | Statement | D | Codeforces Round 480 (Div. 2) {980} | PROGRAMMING | Tutorial | 2100 | |
| 1850 | Cowmpany Cowmpensation | combinatorics dp math trees | Statement | F | Codeforces Round 492 (Div. 1) [Thanks, uDebug!] {995} | PROGRAMMING | Editorial for Codeforces Round #492 [Thanks u-Debug!] | 2700 | |
| 4308 | Recovering BST | brute force dp math number theory trees | Statement | D | Codeforces Round 505 (rated, Div. 1 + Div. 2, based on VK Cup 2018 Final) {1025} | PROGRAMMING | Codeforces Round #505 Editorial | 2000 | |
| 2142 | Vasya and Magic Matrix | dp math probabilities | Statement | E | Codeforces Round 510 (Div. 2) {1042} | PROGRAMMING | Tutorial | 2300 | |
| 3186 | Make It One | bitmasks combinatorics dp math number theory shortest paths | Statement | F | Codeforces Round 519 by Botan Investments {1043} | PROGRAMMING | Codeforces Round #519 Editorial | 2500 | |
| 11071 | Multiplicity | data structures dp implementation math number theory | Statement | C | Codeforces Round 523 (Div. 2) {1061} | PROGRAMMING | Tutorial (en) | 1700 | |
| 636 | Random Forest Rank | dp graph matchings math trees | Statement | E | Codeforces Round 518 (Div. 1) [Thanks, Mail.Ru!] {1067} | PROGRAMMING | Tutorial | 2800 | |
| 749 | Computer Game | dp greedy math probabilities | Statement | D | Codeforces Round 518 (Div. 1) [Thanks, Mail.Ru!] {1067} | PROGRAMMING | Tutorial | 2800 | |
| 1657 | Ehab and a component choosing problem | dp greedy math trees | Statement | E | Codeforces Round 525 (Div. 2) {1088} | PROGRAMMING | Codeforces round #525 editorial | 2400 | |
| 2146 | Inversion Expectation | dp math probabilities | Statement | F | Educational Codeforces Round 57 (Rated for Div. 2) {1096} | PROGRAMMING | Разбор Educational Codeforces Round 57 | 2300 | |
| 1367 | The Top Scorer | combinatorics dp math probabilities | Statement | E | Educational Codeforces Round 57 (Rated for Div. 2) {1096} | PROGRAMMING | Разбор Educational Codeforces Round 57 | 2600 | |
| 3320 | Makoto and a Blackboard | dp math number theory probabilities | Statement | D | Hello 2019 {1097} | PROGRAMMING | 64310 | 2200 | |
| 3932 | Compression | dp implementation math number theory | Statement | D | Educational Codeforces Round 59 (Rated for Div. 2) {1107} | PROGRAMMING | Educational Codeforces Round 59 Editorial | 1800 | |
| 1551 | Sasha and Interesting Fact from Graph Theory | brute force combinatorics dp math trees | Statement | D | Codeforces Round 539 (Div. 1) {1109} | PROGRAMMING | Codeforces Round #539 Editorial | 2600 | |
| 5590 | Magic Gems | dp math matrices | Statement | D | Educational Codeforces Round 60 (Rated for Div. 2) {1117} | PROGRAMMING | 65365 | 2000 | |
| 2812 | Steps to One | dp math number theory probabilities | Statement | D | Codeforces Round 548 (Div. 2) {1139} | PROGRAMMING | Codeforces Round #548 Editorial | 2300 | |
| 4012 | Lynyrd Skynyrd | data structures dfs and similar dp math trees | Statement | B | Codeforces Round 549 (Div. 1) {1142} | PROGRAMMING | Codeforces Round #549 Editorial | 2300 | |
| 1016 | Serval and Bonus Problem | combinatorics dp math probabilities | Statement | F | Codeforces Round 551 (Div. 2) {1153} | PROGRAMMING | Editorial | 2800 | |
| 1770 | Card Bag | dp math probabilities | Statement | F | Educational Codeforces Round 64 (Rated for Div. 2) {1156} | PROGRAMMING | 66827 | 2500 | |
| 1847 | Ehab and the Expected GCD Problem | combinatorics dp math number theory | Statement | E | Codeforces Round 563 (Div. 2) {1174} | PROGRAMMING | Codeforces round #563 editorial | 2500 | |
| 3475 | Product Oriented Recurrence | dp math matrices number theory | Statement | E | Codeforces Round 566 (Div. 2) {1182} | PROGRAMMING | 67614 | 2200 | |
| 1190 | Expected Square Beauty | dp math probabilities | Statement | F | Educational Codeforces Round 67 (Rated for Div. 2) {1187} | PROGRAMMING | Разбор Educational Codeforces Round 67 | 2600 | |
| 1198 | Graph Traveler | brute force data structures dfs and similar dp graphs implementation math number theory | Statement | F | Codeforces Round 578 (Div. 2) {1200} | PROGRAMMING | Codeforces Round #578 (Div. 2) Editorial | 2500 | |
| 2800 | You Are Given a WASD-string... | brute force data structures dp greedy implementation math strings | Statement | C | Educational Codeforces Round 70 (Rated for Div. 2) {1202} | PROGRAMMING | 68972 | 2100 | |
| 2271 | Natasha, Sasha and the Prefix Sums | combinatorics dp math number theory | Statement | E | Codeforces Round 581 (Div. 2) {1204} | PROGRAMMING | 69244 | 2400 | |
| 15620 | Sweets Eating | dp greedy math sortings | Statement | C | Codeforces Round 600 (Div. 2) {1253} | PROGRAMMING | Editorial | 1500 | |
| 4687 | Beautiful Mirrors | data structures dp math probabilities | Statement | E | Codeforces Round 604 (Div. 2) {1265} | PROGRAMMING | Codeforces Round #604 Editorial | 2100 | |
| 144 | Red-Blue Graph | dp graphs math matrices meet-in-the-middle | Statement | H | Codeforces Global Round 6 {1266} | PROGRAMMING | Codeforces Global Round 6 Editorial | 3400 | |
| 2851 | Cards | combinatorics dp math number theory probabilities | Statement | F | Educational Codeforces Round 78 (Rated for Div. 2) {1278} | PROGRAMMING | Educational Codeforces Round 78 Editorial | 2600 | |
| 1060 | Chaotic V. | dp graphs greedy math number theory trees | Statement | D | Codeforces Round 614 (Div. 1) {1292} | PROGRAMMING | 1750.0 | Codeforces Round #614 Editorial | 2700 |
| 708 | Around the World | bitmasks combinatorics dfs and similar dp graphs graphs math trees | Statement | D | Codeforces Round 618 (Div. 1) {1299} | PROGRAMMING | 1750.0 | Codeforces Round #618 Editorial | 2900 |
| 12815 | Cow and Message | brute force dp math strings | Statement | C | Codeforces Round 621 (Div. 1 + Div. 2) {1307} | PROGRAMMING | 1500.0 | Codeforces Round #621 (Div. 1 + Div. 2) Editorial | 1500 |
| 30919 | Orac and Models | dp math number theory | Statement | B | Codeforces Round 641 (Div. 2) {1350} | PROGRAMMING | 1000.0 | Codeforces Round #641 Editorial | 1400 |
| 9285 | TediousLee | dp graphs greedy math matrices trees | Statement | D | Codeforces Round 652 (Div. 2) {1369} | PROGRAMMING | 2000.0 | Codeforces Round #652 (Div. 2) Editorial | 1900 |
| 2994 | Sum of Digits | brute force constructive algorithms dp greedy math number theory | Statement | E | Educational Codeforces Round 90 (Rated for Div. 2) {1373} | PROGRAMMING | Educational Codeforces Round 90 Editorial | ||
| 600 | Inverse Genealogy | constructive algorithms divide and conquer dp math trees | Statement | E | Codeforces Round 657 (Div. 2) {1379} | PROGRAMMING | 2500.0 | Codeforces Round #657 Editorial | 2400 |
| 10504 | Uncle Bogdan and Country Happiness | dfs and similar dp greedy math trees | Statement | C | Codeforces Round 660 (Div. 2) {1388} | PROGRAMMING | 1500.0 | Codeforces Round #660 Editorial | 1800 |
| 10023 | Omkar and Bed Wars | constructive algorithms dp greedy math strings | Statement | D | Codeforces Global Round 10 {1392} | PROGRAMMING | 1500.0 | Codeforces Global Round 10 — Editorial | |
| 11536 | Zigzags | brute force data structures dp math two pointers | Statement | D | Educational Codeforces Round 94 (Rated for Div. 2) {1400} | PROGRAMMING | 81942 | ||
| 1381 | Fancy Fence | *special data structures dp dsu math sortings | Statement | A | Central-European Olympiad in Informatics, CEOI 2020, Day 1 (IOI, Unofficial Mirror Contest, Unrated) {1402} | PROGRAMMING | Editorial | ||
| 8891 | Bargain | dp math probabilities | Statement | C | Codeforces Round 675 (Div. 2) {1422} | PROGRAMMING | 1000.0 | Codeforces Round #675 (Div. 2) Editorial | |
| 8061 | Strange Beauty | dfs and similar dp math number theory | Statement | G | Codeforces Round 697 (Div. 3) {1475} | PROGRAMMING | Codeforces Round #697 (Div. 3) Editorial | ||
| 471 | School Clubs | dp fft math number theory probabilities | Statement | E | Codeforces Round 700 (Div. 1) {1479} | PROGRAMMING | 4000.0 | Editorial of Codeforces Round #700 | |
| 9194 | Square-free division (easy version) | data structures dp greedy math number theory | Statement | E1 | Codeforces Round 708 (Div. 2) {1497} | PROGRAMMING | 1500.0 | Codeforces Round #708 Editorial | 1700 |
| 1961 | Square-free division (hard version) | data structures dp greedy hashing math number theory | Statement | E2 | Codeforces Round 708 (Div. 2) {1497} | PROGRAMMING | 1500.0 | Codeforces Round #708 Editorial | 2500 |
| 1105 | Christmas Game | data structures dfs and similar dp games math trees | Statement | F | CodeCraft-21 and Codeforces Round 711 (Div. 2) {1498} | PROGRAMMING | 3000.0 | CodeCraft-21 and Codeforces Round #711 (Div. 2) Editorial | |
| 2141 | Digits | brute force dp math number theory | Statement | D | 2020-2021 ICPC, NERC, Northern Eurasia Onsite (Unrated, Online Mirror, ICPC Rules, Teams Preferred) {1510} | PROGRAMMING | nerc-2020-offline-tutorial.pdf | ||
| 605 | Chainword | data structures dp math matrices strings | Statement | F | Educational Codeforces Round 107 (Rated for Div. 2) {1511} | PROGRAMMING | 89634 | ||
| 9650 | Short Task | brute force dp math number theory | Statement | G | Codeforces Round 713 (Div. 3) {1512} | PROGRAMMING | Codeforces Round #713 (Div. 3) Editorial | ||
| 17921 | Maximum Sum of Products | brute force dp implementation math ternary search two pointers | Statement | D | Educational Codeforces Round 108 (Rated for Div. 2) {1519} | PROGRAMMING | Educational Codeforces Round 108 Editorial | ||
| 2542 | Assimilation IV | combinatorics dp math probabilities | Statement | E | Educational Codeforces Round 109 (Rated for Div. 2) {1525} | PROGRAMMING | 90793 | ||
| 37741 | I Hate 1111 | dp math number theory | Statement | B | Codeforces Round 723 (Div. 2) {1526} | PROGRAMMING | 1000.0 | Codeforces Round #723 (Div. 2) Editorial | |
| 3082 | Tree Array | brute force combinatorics dp math probabilities trees | Statement | B | Codeforces Round 728 (Div. 1) {1540} | PROGRAMMING | 1250.0 | Tutorial | |
| 1443 | You | dfs and similar dp math number theory | Statement | E | Codeforces Round 735 (Div. 2) {1554} | PROGRAMMING | 3000.0 | Editorial of Codeforces Round #735 (Div. 2) | 2600 |
| 1470 | Sports Betting | bitmasks combinatorics dp graphs math probabilities | Statement | F | Deltix Round, Summer 2021 (open for everyone, rated, Div. 1 + Div. 2) {1556} | PROGRAMMING | 2500.0 | 94384 | 2500 |
| 5365 | Up the Strip | brute force dp math number theory | Statement | B | Codeforces Round 740 (Div. 1, based on VK Cup 2021 - Final (Engine)) {1558} | PROGRAMMING | 1250.0 | Codeforces Round #740 Editorial | 1900 |
| 2805 | Mocha and Stars | combinatorics dp fft math number theory | Statement | E | Codeforces Round 738 (Div. 2) {1559} | PROGRAMMING | 3000.0 | Tutorial (en) | 2200 |
| 6184 | Up the Strip (simplified version) | brute force data structures dp math number theory | Statement | D1 | Codeforces Round 740 (Div. 2, based on VK Cup 2021 - Final (Engine)) {1561} | PROGRAMMING | 1500.0 | Codeforces Round #740 Editorial | 1700 |
| 184 | Xor-quiz | constructive algorithms dp interactive math number theory | Statement | H | Codeforces Global Round 16 {1566} | PROGRAMMING | 3750.0 | Codeforces Global Round 16 Editorial | |
| 43476 | Make it Divisible by 25 | dp greedy math math | Statement | B | Codeforces Round 748 (Div. 3) {1593} | PROGRAMMING | Editorial for Codeforces Round #748 (Div.3) | ||
| 5628 | Half of Same | dp math number theory | Statement | D2 | Codeforces Round 748 (Div. 3) {1593} | PROGRAMMING | Editorial for Codeforces Round #748 (Div.3) | ||
| 1690 | Rubik's Cube Coloring (hard version) | brute force dp implementation math trees | Statement | E2 | Codeforces Round 747 (Div. 2) {1594} | PROGRAMMING | 1500.0 | 95525 | 2300 |
| 2345 | Extreme Extension | dp greedy math number theory | Statement | C | Codeforces Round 752 (Div. 1) {1603} | PROGRAMMING | 1750.0 | Editorial of Codeforces Round #752 | 2300 |
| 1762 | Purple Crayon | dp games greedy math trees | Statement | E | Codeforces Global Round 18 {1615} | PROGRAMMING | 2750.0 | Global Round 18 Editorial | |
| 1077 | Christmas Chocolates | dfs and similar dp games graphs implementation math number theory shortest paths trees | Statement | E | Codeforces Round 761 (Div. 2) {1617} | PROGRAMMING | 3000.0 | Editorial for Codeforces Round #761 (Div. 2) | |
| 10359 | MEX and Increments | constructive algorithms data structures dp greedy math sortings | Statement | E | Codeforces Round 762 (Div. 3) {1619} | PROGRAMMING | Tutorial | ||
| 7336 | BA-String | bitmasks brute force dp greedy implementation math shortest paths | Statement | C | Educational Codeforces Round 119 (Rated for Div. 2) {1620} | PROGRAMMING | 98061 | ||
| 1499 | Robot Cleaner Revisit | dp implementation math probabilities | Statement | D | Codeforces Round 763 (Div. 2) {1623} | PROGRAMMING | 2500.0 | Codeforces Round #763 (Div. 2) Editorial | |
| 929 | A Random Code Problem | combinatorics dp math number theory | Statement | F | Educational Codeforces Round 121 (Rated for Div. 2) {1626} | PROGRAMMING | 99136 | ||
| 9548 | Not Adding | dp math number theory | Statement | D | Codeforces Round 766 (Div. 2) {1627} | PROGRAMMING | 1750.0 | Codeforces Round #766 (Div. 2) Editorial | |
| 5457 | New Year Concert | binary search data structures dp greedy math number theory two pointers | Statement | D | Codeforces Round 769 (Div. 2) {1632} | PROGRAMMING | 2000.0 | Editorial of Codeforces Round #769 | |
| 7143 | Infinite Set | dp math matrices number theory strings | Statement | D | Codeforces Round 772 (Div. 2) {1635} | PROGRAMMING | 2250.0 | Codeforces Round #772 Editorial | |
| 5731 | Madoka and the Best School in Russia | dp math number theory | Statement | D | Codeforces Round 777 (Div. 2) {1647} | PROGRAMMING | 2000.0 | Codeforces Round #777 Editorial | |
| 5368 | For Gamers. By Gamers. | binary search dp math sortings two pointers | Statement | D | Educational Codeforces Round 125 (Rated for Div. 2) {1657} | PROGRAMMING | 101161 | ||
| 1257 | Gojou and Matrix Game | data structures dp games math number theory sortings | Statement | E | Codeforces Round 779 (Div. 2) {1658} | PROGRAMMING | 2500.0 | Codeforces Round #779 (Div. 2) Editorial | |
| 19081 | Palindrome Basis | dp math number theory | Statement | C | Codeforces Round 785 (Div. 2) {1673} | PROGRAMMING | 1500.0 | Codeforces Round #785 (Div. 2) Editorial | |
| 1188 | K-Set Tree | combinatorics dfs and similar dp math trees | Statement | F | CodeCraft-22 and Codeforces Round 795 (Div. 2) {1691} | PROGRAMMING | 2750.0 | Editorial for CodeCraft-22 and Codeforces Round #795 (Div. 2) | |
| 219 | Maximum Product? | brute force combinatorics dp greedy math two pointers | Statement | H | Codeforces Global Round 21 {1696} | PROGRAMMING | 4000.0 | Editorial of Codeforces Global Round 21 | |
| 1428 | Three Days Grace | dp math two pointers | Statement | E | Codeforces Round 804 (Div. 2) {1699} | PROGRAMMING | 2500.0 | Codeforces Round #804 (Div. 2) Editorial | |
| 1021 | Partial Virtual Trees | combinatorics dp math trees | Statement | D | Codeforces Round 808 (Div. 1) {1707} | PROGRAMMING | 1750.0 | 104930 | |
| 5995 | Burenka and Traditions (hard version) | data structures dp greedy math two pointers | Statement | A2 | Codeforces Round 814 (Div. 1) {1718} | PROGRAMMING | 500.0 | Codeforces Round #814 (Div. 1, Div. 2) Editorial | |
| 3572 | Graph Cost | dp greedy math number theory | Statement | E | Codeforces Round 841 (Div. 2) and Divide by Zero 2022 {1731} | PROGRAMMING | 2000.0 | Codeforces Round #841 (Div. 2) and Divide By Zero 2022 Editorial | |
| 1866 | Balance Addicts | combinatorics dp math two pointers | Statement | E | Codeforces Global Round 22 {1738} | PROGRAMMING | 2500.0 | Editorial of Codeforces Global Round <strong>22</strong> | |
| 1871 | Intersection and Union | combinatorics data structures dp math matrices | Statement | F | Educational Codeforces Round 137 (Rated for Div. 2) {1743} | PROGRAMMING | Educational Codeforces Round 137 Editorial | 2300 | |
| 7637 | Count GCD | bitmasks combinatorics dp math number theory | Statement | D | CodeTON Round 3 (Div. 1 + Div. 2, Rated, Prizes!) {1750} | PROGRAMMING | 1750.0 | CodeTON Round 3 (Div. 1 + Div. 2) Editorial | |
| 452 | Doping | dp dp math math | Statement | G | CodeTON Round 3 (Div. 1 + Div. 2, Rated, Prizes!) {1750} | PROGRAMMING | 3250.0 | CodeTON Round 3 (Div. 1 + Div. 2) Editorial | |
| 5473 | Wish I Knew How to Sort | dp math probabilities | Statement | C | Codeforces Round 829 (Div. 1) {1753} | PROGRAMMING | 1750.0 | Tutorial | 2000 |
| 10989 | Lucky Chains | brute force dp greedy math number theory | Statement | D | Educational Codeforces Round 139 (Rated for Div. 2) {1766} | PROGRAMMING | 110066 | ||
| 1646 | Koxia and Tree | combinatorics dp math probabilities trees | Statement | E | Good Bye 2022: 2023 is NEAR {1770} | PROGRAMMING | 2000.0 | Good Bye 2022 -- Editorial | |
| 563 | Game of Questions | bitmasks dp math probabilities | Statement | G | 2022-2023 ICPC, NERC, Northern Eurasia Onsite (Unrated, Online Mirror, ICPC Rules, Teams Preferred) {1773} | PROGRAMMING | 2800 | ||
| 3567 | Flexible String Revisit | combinatorics dp math probabilities | Statement | D | Codeforces Round 848 (Div. 2) {1778} | PROGRAMMING | 1750.0 | Codeforces Round #848 (Div. 2) Editorial | |
| 968 | Maximizing Root | dfs and similar dp graphs math trees | Statement | F | Codeforces Round 848 (Div. 2) {1778} | PROGRAMMING | 2750.0 | Codeforces Round #848 (Div. 2) Editorial | |
| 1374 | Bracket Insertion | brute force combinatorics constructive algorithms dp math trees | Statement | F | VK Cup 2022 - Отборочный раунд (Engine) {1781} | PROGRAMMING | 3250.0 | Tutorial | |
| 4789 | Moving Dots | binary search brute force combinatorics dp math two pointers | Statement | D | Codeforces Round 851 (Div. 2) {1788} | PROGRAMMING | 2250.0 | Codeforces Round #851 (Div. 2) Editorial | |
| 4638 | Counting Factorizations | combinatorics dp math number theory | Statement | D | Codeforces Round 856 (Div. 2) {1794} | PROGRAMMING | 2000.0 | Codeforces Round 856 (Div. 2) Editorial | |
| 694 | Gifts from Grandfather Ahmed | dp math number theory | Statement | F | Codeforces Round 860 (Div. 2) {1798} | PROGRAMMING | 3000.0 | Editorial of Codeforces Round 860 (Div. 2) | 2500 |
| 29661 | Subsequence Addition (Hard Version) | dp greedy implementation math sortings | Statement | G2 | Codeforces Round 859 (Div. 4) {1807} | PROGRAMMING | 114143 | ||
| 2202 | Vlad and the Nice Paths (hard version) | binary search combinatorics data structures dp math two pointers | Statement | G2 | Codeforces Round 863 (Div. 3) {1811} | PROGRAMMING | 114788 | ||
| 14679 | Living Sequence | binary search dp math number theory | Statement | E | Codeforces Round 863 (Div. 3) {1811} | PROGRAMMING | 114788 | ||
| 487 | Bosco and Particle | dp math number theory strings | Statement | E | Codeforces Round 865 (Div. 1) {1815} | PROGRAMMING | 3000.0 | Editorial of Codeforces Round #865 | 3100 |
| 1782 | The Fox and the Complete Tree Traversal | constructive algorithms dp games implementation math trees | Statement | C | Codeforces Round 866 (Div. 1) {1819} | PROGRAMMING | 1500.0 | Codeforces Round #866 (Div.1, Div.2, based on Lipetsk Team Olympiad) Editorial | |
| 2773 | Rearrange Brackets | dp greedy math sortings | Statement | E | Educational Codeforces Round 147 (Rated for Div. 2) {1821} | PROGRAMMING | 115296 | ||
| 1399 | Random Walk | dp graphs math probabilities trees | Statement | F | Codeforces Round 868 (Div. 2) {1823} | PROGRAMMING | 2500.0 | 115465 | |
| 353 | Old Mobile | dp math probabilities | Statement | E | Codeforces Round 880 (Div. 1) {1835} | PROGRAMMING | 2250.0 | Codeforces Round 880 Editorial | |
| 9258 | Ranom Numbers | brute force dp greedy math strings | Statement | C | Educational Codeforces Round 150 (Rated for Div. 2) {1841} | PROGRAMMING | 117262 | ||
| 1756 | Tenzing and Random Operations | combinatorics dp math probabilities | Statement | G | CodeTON Round 5 (Div. 1 + Div. 2, Rated, Prizes!) {1842} | PROGRAMMING | 3000.0 | CodeTON Round 5 Editorial | |
| 2255 | Omsk Metro (hard version) | data structures dfs and similar divide and conquer dp implementation math trees | Statement | F2 | Codeforces Round 881 (Div. 3) {1843} | PROGRAMMING | Codeforces Round #881 (Div. 3) Editorial | ||
| 6495 | Omsk Metro (simple version) | data structures dfs and similar dp greedy math trees | Statement | F1 | Codeforces Round 881 (Div. 3) {1843} | PROGRAMMING | Codeforces Round #881 (Div. 3) Editorial | ||
| 1977 | Expected Destruction | dp math probabilities | Statement | C | Codeforces Round 889 (Div. 1) {1854} | PROGRAMMING | 1500.0 | Editorial of Codeforces Round 889 (Div. 1 + Div. 2) | |
| 628 | Asterism Stream | dp math matrices probabilities | Statement | H | Harbour.Space Scholarship Contest 2023-2024 (Div. 1 + Div. 2) {1864} | PROGRAMMING | 3500.0 | Harbour.Space Scholarship Contest 2023-2024 (Div. 1 + Div. 2) Editorial | |
| 1011 | Mighty Rock Tower | combinatorics dp math probabilities | Statement | M | COMPFEST 15 - Preliminary Online Mirror (Unrated, ICPC Rules, Teams Preferred) {1866} | PROGRAMMING | COMPFEST 15 Preliminary — Editorial | ||
| 1408 | Travel Plan | combinatorics divide and conquer dp math trees | Statement | C | Codeforces Round 896 (Div. 1) {1868} | PROGRAMMING | 1000.0 | Codeforces Round 896 (Div. 1, Div. 2) Editorial | |
| 13304 | Colorful Table | binary search data structures dp implementation math sortings two pointers | Statement | C | CodeTON Round 6 (Div. 1 + Div. 2, Rated, Prizes!) {1870} | PROGRAMMING | 1500.0 | CodeTON Round 6 (Div. 1 + Div. 2, Rated, Prizes!) Editorial | |
| 2239 | Jellyfish and EVA | dp graphs greedy math probabilities | Statement | C | Codeforces Round 901 (Div. 1) {1874} | PROGRAMMING | 1500.0 | Codeforces Round 901 (Div. 1, Div. 2) Editorial | |
| 1005 | Jellyfish and Miku | dp math probabilities | Statement | D | Codeforces Round 901 (Div. 1) {1874} | PROGRAMMING | 2250.0 | Codeforces Round 901 (Div. 1, Div. 2) Editorial | |
| 4296 | Counting Rhyme | brute force combinatorics dp math number theory sortings | Statement | D | Codeforces Round 904 (Div. 2) {1884} | PROGRAMMING | 2500.0 | Codeforces Round #904 (Div. 2) Editorial | |
| 214 | Cyclic Hamming (Easy Version) | divide and conquer dp fft math number theory | Statement | H1 | CodeTON Round 7 (Div. 1 + Div. 2, Rated, Prizes!) {1896} | PROGRAMMING | 4000.0 | CodeTON Round 7 (Div. 1 + Div. 2, Rated, Prizes!) Editorial | |
| 173 | Cyclic Hamming (Hard Version) | dp fft math number theory | Statement | H2 | CodeTON Round 7 (Div. 1 + Div. 2, Rated, Prizes!) {1896} | PROGRAMMING | 1000.0 | CodeTON Round 7 (Div. 1 + Div. 2, Rated, Prizes!) Editorial | |
| 754 | Matrix Rank (Easy Version) | brute force combinatorics dp math matrices | Statement | H1 | Good Bye 2023 {1916} | PROGRAMMING | 2750.0 | ||
| 686 | Matrix Rank (Hard Version) | combinatorics dp math matrices | Statement | H2 | Good Bye 2023 {1916} | PROGRAMMING | 1750.0 | ||
| 3514 | Counting Binary Strings | combinatorics dp math strings | Statement | E | Codeforces Round 919 (Div. 2) {1920} | PROGRAMMING | 2250.0 | Editorial for Codeforces Round #919 (Div. 2) | |
| 4967 | Good Trip | combinatorics dp math probabilities | Statement | D | Codeforces Round 921 (Div. 2) {1925} | PROGRAMMING | 1750.0 | Codeforces Round 921 (Div. 1, Div. 2) Editorial | |
| 15239 | Vlad and an Odd Ordering | binary search bitmasks data structures dp implementation math number theory | Statement | E | Codeforces Round 928 (Div. 4) {1926} | PROGRAMMING | 126132 | ||
| 2260 | Modular Sequence | constructive algorithms dp greedy implementation math number theory | Statement | E | Codeforces Round 924 (Div. 2) {1928} | PROGRAMMING | 2250.0 | Codeforces Round 924 Editorial | |
| 5927 | Sasha and a Walk in the City | combinatorics dfs and similar dp math trees | Statement | D | Codeforces Round 926 (Div. 2) {1929} | PROGRAMMING | 2000.0 | Codeforces Round #926 (Div. 2) Editorial. | |
| 1297 | Nobody is needed | brute force data structures dp math number theory | Statement | F | Codeforces Round 936 (Div. 2) {1946} | PROGRAMMING | 2750.0 | Codeforces Round #936 (Div. 2) Editorial | |
| 3251 | Girl Permutation | combinatorics dp math number theory | Statement | E | Codeforces Round 936 (Div. 2) {1946} | PROGRAMMING | 2250.0 | Codeforces Round #936 (Div. 2) Editorial | |
| 8380 | Colored Balls | combinatorics dp greedy math sortings | Statement | D | Educational Codeforces Round 164 (Rated for Div. 2) {1954} | PROGRAMMING | Educational Codeforces Round 164 Editorial | ||
| 6083 | GCD on a grid | brute force dfs and similar dp math number theory | Statement | G | Codeforces Round 938 (Div. 3) {1955} | PROGRAMMING | 128243 | ||
| 1685 | Carousel of Combinations | brute force combinatorics dp math number theory | Statement | E | Codeforces Round 940 (Div. 2) and CodeCraft-23 {1957} | PROGRAMMING | 2250.0 | Codeforces Round #940 and CodeCraft-23 (Div. 2) Editorial | 2400 |
| 2313 | Fenwick Tree | bitmasks brute force combinatorics data structures dp math trees | Statement | C | Codeforces Round 942 (Div. 1) {1967} | PROGRAMMING | 1250.0 | Tutorial | 2300 |
| 2658 | Division + LCP (hard version) | binary search brute force data structures dp hashing math string suffix structures strings | Statement | G2 | Codeforces Round 943 (Div. 3) {1968} | PROGRAMMING | 129096 | 2200 | |
| 8198 | Nikita and LCM | brute force data structures dp greedy math number theory sortings | Statement | C | Codeforces Round 948 (Div. 2) {1977} | PROGRAMMING | 1750.0 | 129858 | 1900 |
| 1953 | Number of k-good subarrays | bitmasks combinatorics divide and conquer dp math meet-in-the-middle | Statement | E | Codeforces Round 955 (Div. 2, with prizes from NEAR!) {1982} | PROGRAMMING | 2500.0 | 130839 | |
| 11094 | Beautiful Array | dp math sortings | Statement | E | Codeforces Round 954 (Div. 3) {1986} | PROGRAMMING | 130762 | ||
| 7253 | Smithing Skill | brute force dp greedy math sortings two pointers | Statement | D | Educational Codeforces Round 167 (Rated for Div. 2) {1989} | PROGRAMMING | Educational Codeforces Round 167 Editorial | ||
| 1026 | Court Blue (Easy Version) | brute force dfs and similar dp math number theory | Statement | F1 | EPIC Institute of Technology Round August 2024 (Div. 1 + Div. 2) {2002} | PROGRAMMING | 2000.0 | EPIC Institute of Technology Round August 2024 (Div. 1 + Div. 2) Editorial | |
| 600 | Court Blue (Hard Version) | brute force dp math number theory | Statement | F2 | EPIC Institute of Technology Round August 2024 (Div. 1 + Div. 2) {2002} | PROGRAMMING | 1250.0 | EPIC Institute of Technology Round August 2024 (Div. 1 + Div. 2) Editorial | |
| 4392 | Prefix GCD | brute force dp greedy math number theory | Statement | E | Codeforces Round 973 (Div. 2) {2013} | PROGRAMMING | 2500.0 | 134298 | |
| 5333 | Speedbreaker | binary search dp greedy implementation math two pointers | Statement | B | Codeforces Round 975 (Div. 1) {2018} | PROGRAMMING | 750.0 | Editorial of Codeforces Round 975 (Div. 1, Div. 2) | |
| 4111 | Expected Power | bitmasks brute force dp math number theory probabilities | Statement | E | Codeforces Round 976 (Div. 2) and Divide By Zero 9.0 {2020} | PROGRAMMING | 2000.0 | Tutorial for Codeforces Round 976 (Div. 2) and Divide By Zero 9.0 | |
| 7602 | Connect the Dots | brute force dfs and similar dp dsu graphs math trees | Statement | D | Codeforces Round 976 (Div. 2) and Divide By Zero 9.0 {2020} | PROGRAMMING | 1500.0 | Tutorial for Codeforces Round 976 (Div. 2) and Divide By Zero 9.0 | |
| 275 | Count Leaves | dp math number theory | Statement | F | Codeforces Round 976 (Div. 2) and Divide By Zero 9.0 {2020} | PROGRAMMING | 2750.0 | Tutorial for Codeforces Round 976 (Div. 2) and Divide By Zero 9.0 | |
| 1969 | Digital Village (Easy Version) | brute force data structures dp dsu graphs greedy implementation math shortest paths trees | Statement | E1 | Codeforces Round 977 (Div. 2, based on COMPFEST 16 - Final Round) {2021} | PROGRAMMING | 1750.0 | Codeforces Round #977 (Div. 2, based on COMPFEST 16 — Final Round) Editorial | |
| 1261 | Digital Village (Hard Version) | data structures dp dsu graphs math trees | Statement | E2 | Codeforces Round 977 (Div. 2, based on COMPFEST 16 - Final Round) {2021} | PROGRAMMING | 750.0 | Codeforces Round #977 (Div. 2, based on COMPFEST 16 — Final Round) Editorial | |
| 1994 | Alice's Adventures in the Rabbit Hole | constructive algorithms dfs and similar dp greedy math probabilities trees | Statement | E | Codeforces Round 986 (Div. 2) {2028} | PROGRAMMING | 2000.0 | Codeforces Round 986 (Div. 2) Editorial | |
| 21299 | Penchick and Modern Monument | dp greedy math two pointers | Statement | A | Codeforces Round 987 (Div. 2) {2031} | PROGRAMMING | 500.0 | Codeforces Round 987 (Div. 2) Editorial | |
| 5926 | Yet Another Real Number Problem | binary search brute force data structures dp greedy implementation math two pointers | Statement | D | Codeforces Global Round 27 {2035} | PROGRAMMING | 1500.0 | Codeforces Global Round 27 Editorial | |
| 3900 | Natlan Exploring | combinatorics dp math number theory | Statement | G | Codeforces Round 988 (Div. 3) {2037} | PROGRAMMING | Video Tutorial | ||
| 1829 | Grid Walk | dp greedy math number theory | Statement | K | 2024-2025 ICPC, NERC, Southern and Volga Russian Regional Contest (Unrated, Online Mirror, ICPC Rules, Preferably Teams) {2038} | PROGRAMMING | 2100 | ||
| 529 | Shohag Loves Counting (Easy Version) | combinatorics dp math number theory | Statement | F1 | CodeTON Round 9 (Div. 1 + Div. 2, Rated, Prizes!) {2039} | PROGRAMMING | 2000.0 | Editorial of CodeTON Round 9 (Div. 1 + Div. 2) | |
| 1351 | Kevin and Math Class | brute force data structures divide and conquer dp math trees two pointers | Statement | F | Codeforces Global Round 28 {2048} | PROGRAMMING | 2000.0 | Tutorial | |
| 406 | Managing Cluster | dp graphs math trees | Statement | M | 2024-2025 ICPC, NERC, Northern Eurasia Finals (Unrated, Online Mirror, ICPC Rules, Teams Preferred) {2052} | PROGRAMMING | |||
| 111 | Affectionate Arrays (Hard Version) | data structures dp graphs greedy math shortest paths two pointers | Statement | I2 | Good Bye 2024: 2025 is NEAR {2053} | PROGRAMMING | 2000.0 | Good Bye 2024: 2025 is NEAR Editorial | |
| 1063 | Nested Segments | combinatorics dp math trees | Statement | E | Codeforces Round 997 (Div. 2) {2056} | PROGRAMMING | 2250.0 | Codeforces Round #997 (Div. 2) Editorial | |
| 638 | Traveling Salescat | dp geometry greedy math sortings | Statement | F | Ethflow Round 1 (Codeforces Round 1001, Div. 1 + Div. 2) {2062} | PROGRAMMING | 3500.0 | Ethflow Round 1 (Codeforces Round 1001, Div. 1 + Div. 2) Editorial | |
| 5185 | Game With Triangles | binary search data structures dp greedy math ternary search two pointers | Statement | D | Codeforces Round 1000 (Div. 2) {2063} | PROGRAMMING | 2250.0 | Codeforces Round 1000 (Div. 2) — Editorial | |
| 637 | Another Folding Strip | combinatorics data structures divide and conquer dp math sortings | Statement | E | Codeforces Round 1008 (Div. 1) {2077} | PROGRAMMING | 2250.0 | Codeforces Round 1008 (Div. 1, Div. 2) Editorial | |
| 4267 | Math Division | bitmasks dp math probabilities | Statement | A | Codeforces Round 1010 (Div. 1, Unrated) {2081} | PROGRAMMING | 500.0 | Codeforces Round 1010 (Div. 1, Div. 2, based on Zhili Cup 2025) Editorial | |
| 8631 | Even String | combinatorics dp math strings | Statement | D | Educational Codeforces Round 177 (Rated for Div. 2) {2086} | PROGRAMMING | Educational Codeforces Round 177 Editorial | ||
| 1489 | Key of Like (Easy Version) | dp math probabilities | Statement | C1 | Codeforces Round 1012 (Div. 1) {2089} | PROGRAMMING | 1000.0 | Codeforces Round 1012 (Div.1, Div. 2, based on THUPC 2025 — Finals) Editorial | |
| 271 | Key of Like (Hard Version) | dp math probabilities | Statement | C2 | Codeforces Round 1012 (Div. 1) {2089} | PROGRAMMING | 1250.0 | Codeforces Round 1012 (Div.1, Div. 2, based on THUPC 2025 — Finals) Editorial | |
| 1638 | Gleb and Boating | brute force constructive algorithms data structures dp graphs greedy math shortest paths | Statement | G | Codeforces Round 1013 (Div. 3) {2091} | PROGRAMMING | Codeforces Round 1013 (Div. 3) Editorial | ||
| 3459 | Tree Colorings | combinatorics dp graphs math trees | Statement | E | Educational Codeforces Round 180 (Rated for Div. 2) {2112} | PROGRAMMING | Educational Codeforces Round 180 — Editorial | ||
| 5648 | Small Operations | binary search bitmasks brute force dfs and similar dp math number theory sortings | Statement | F | Codeforces Round 1027 (Div. 3) {2114} | PROGRAMMING | 143268 | ||
| 2091 | Build an Array | bitmasks dp math number theory | Statement | G | Codeforces Round 1027 (Div. 3) {2114} | PROGRAMMING | 143268 | ||
| 17327 | Gellyfish and Flaming Peony | brute force constructive algorithms dp greedy math number theory shortest paths | Statement | A | Codeforces Round 1028 (Div. 1) {2115} | PROGRAMMING | 500.0 | Codeforces Round 1028 (Div.1, Div.2) Editorial | |
| 1931 | Gellyfish and Eternal Violet | combinatorics dp greedy math meet-in-the-middle probabilities | Statement | C | Codeforces Round 1028 (Div. 1) {2115} | PROGRAMMING | 1750.0 | Codeforces Round 1028 (Div.1, Div.2) Editorial | |
| 1449 | Sets of Complementary Sums | combinatorics dp math two pointers | Statement | E | Educational Codeforces Round 181 (Rated for Div. 2) {2125} | PROGRAMMING | Educational Codeforces Round 181 Editorial | ||
| 3906 | Wafu! | bitmasks brute force dp math | Statement | G | Codeforces Round 1042 (Div. 3) {2131} | PROGRAMMING | Codeforces Round 1042 (Div. 3) Editorial | ||
| 251 | Beyond the Palindrome (Hard Version) | combinatorics dp math number theory | Statement | E2 | Codeforces Round 1046 (Div. 1) {2135} | PROGRAMMING | 2000.0 | Codeforces Round 1046 (Div. 1, Div. 2) Editorial |