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< 1 2 3 4 5 6 ... 13 14 15 >Solved |
Name |
Tags |
Solutions |
Index |
Contest |
Type |
Points |
Tutorial |
Rating Level |
|---|---|---|---|---|---|---|---|---|---|
| 4962 | Santa Claus and Robot | constructive algorithms math | Statement | C | Technocup 2017 - Elimination Round 3 {748} | PROGRAMMING | Codeforces Round 389 (Div.2) Editorial | 1400 | |
| 9391 | Santa Claus and a Place in a Class | implementation math | Statement | A | Technocup 2017 - Elimination Round 3 {748} | PROGRAMMING | Codeforces Round 389 (Div.2) Editorial | 900 | |
| 58386 | Bachgold Problem | greedy implementation math number theory | Statement | A | Codeforces Round 388 (Div. 2) {749} | PROGRAMMING | Tutorial | 700 | |
| 7140 | New Year and Rating | binary search greedy math | Statement | C | Good Bye 2016 {750} | PROGRAMMING | Good Bye 2016 — hints and codes | 1600 | |
| 95783 | New Year and Hurry | binary search brute force implementation math | Statement | A | Good Bye 2016 {750} | PROGRAMMING | Good Bye 2016 — hints and codes | 800 | |
| 10166 | Santa Claus and Candies | dp greedy math | Statement | A | Testing Round 13 {753} | PROGRAMMING | 1100 | ||
| 1154 | 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 | |
| 20259 | PolandBall and Hypothesis | brute force graphs math number theory | Statement | A | 8VC Venture Cup 2017 - Elimination Round {755} | PROGRAMMING | 8VC Venture Cup 2017 — Elimination Round [Editorial] | 900 | |
| 328 | Byteland coins | combinatorics dp math | Statement | E | 8VC Venture Cup 2017 - Final Round {756} | PROGRAMMING | 8VC Venture Cup 2017 — Final Round and Codeforces Round #393 Editorial | 3200 | |
| 270 | Long number | expression parsing math number theory | Statement | F | 8VC Venture Cup 2017 - Final Round {756} | PROGRAMMING | 8VC Venture Cup 2017 — Final Round and Codeforces Round #393 Editorial | 3200 | |
| 11637 | Bash's Big Day | greedy math number theory | Statement | B | Codecraft-17 and Codeforces Round 391 (Div. 1 + Div. 2, combined) {757} | PROGRAMMING | CodeCraft-17 and Codeforces Round #391 (Div. 1 + Div. 2, combined) Editorial | 1400 | |
| 4079 | Unfair Poll | binary search constructive algorithms implementation math | Statement | C | Codeforces Round 392 (Div. 2) {758} | PROGRAMMING | Codeforces Round #392 (Div. 2) Editorial | 1700 | |
| 2967 | 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 | |
| 762 | Geometrical Progression | brute force math number theory | Statement | F | Codeforces Round 392 (Div. 2) {758} | PROGRAMMING | Codeforces Round #392 (Div. 2) Editorial | 2500 | |
| 77511 | Holiday Of Equality | implementation math | Statement | A | Codeforces Round 392 (Div. 2) {758} | PROGRAMMING | Codeforces Round #392 (Div. 2) Editorial | 700 | |
| 8707 | Petr and a calendar | implementation math | Statement | A | Codeforces Round 393 (Div. 2) (8VC Venture Cup 2017 - Final Round Div. 2 Edition) {760} | PROGRAMMING | 8VC Venture Cup 2017 — Final Round and Codeforces Round #393 Editorial | 900 | |
| 15250 | Dasha and Stairs | brute force constructive algorithms implementation math | Statement | A | Codeforces Round 394 (Div. 2) {761} | PROGRAMMING | Codeforces Round #394 (Div. 2) [Editorial] | 1100 | |
| 7086 | Dasha and friends | brute force implementation math | Statement | B | Codeforces Round 394 (Div. 2) {761} | PROGRAMMING | Codeforces Round #394 (Div. 2) [Editorial] | 1300 | |
| 27177 | k-th divisor | math number theory | Statement | A | Educational Codeforces Round 17 {762} | PROGRAMMING | Tutorial | 1500 | |
| 820 | Timofey and remoduling | brute force implementation math number theory | Statement | C | Codeforces Round 395 (Div. 1) {763} | PROGRAMMING | Codeforces Round #395 [Editorial] | 2500 | |
| 17224 | Taymyr is calling you | brute force implementation math | Statement | A | Codeforces Round 395 (Div. 2) {764} | PROGRAMMING | Codeforces Round #395 [Editorial] | 800 | |
| 7479 | Table Tennis Game 2 | math | Statement | C | Codeforces Round 397 by Kaspersky Lab and Barcelona Bootcamp (Div. 1 + Div. 2 combined) {765} | PROGRAMMING | Codeforces Round #397 Editorial | 1300 | |
| 2609 | Artsem and Saunders | constructive algorithms dsu math | Statement | D | Codeforces Round 397 by Kaspersky Lab and Barcelona Bootcamp (Div. 1 + Div. 2 combined) {765} | PROGRAMMING | Codeforces Round #397 Editorial | 1700 | |
| 120 | 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 | |
| 9639 | Neverending competitions | implementation math | Statement | A | Codeforces Round 397 by Kaspersky Lab and Barcelona Bootcamp (Div. 1 + Div. 2 combined) {765} | PROGRAMMING | Codeforces Round #397 Editorial | 900 | |
| 39121 | Mahmoud and a Triangle | constructive algorithms geometry greedy math number theory sortings | Statement | B | Codeforces Round 396 (Div. 2) {766} | PROGRAMMING | Codeforces round #396 editorial | 1100 | |
| 3645 | 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 | |
| 3585 | 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 | |
| 1158 | Barrels and boxes | brute force combinatorics math number theory probabilities | Statement | F | 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) | 2300 | |
| 3095 | Maximize Sum of Digits | *special implementation math | Statement | B | VK Cup 2017 - Qualification 2 {770} | PROGRAMMING | Tutorial of VK Cup 2017 Qualification Round 2 | 1700 | |
| 1637 | Draw Brackets! | *special implementation | Statement | D | VK Cup 2017 - Qualification 2 {770} | PROGRAMMING | Tutorial of VK Cup 2017 Qualification Round 2 | 1900 | |
| 5037 | Voltage Keepsake | binary search math | Statement | A | VK Cup 2017 - Round 2 {772} | PROGRAMMING | VK Cup Round 2 + Codeforces Round #409 Tutorial | 1800 | |
| 1498 | 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 | |
| 4820 | Success Rate | binary search math | Statement | A | VK Cup 2017 - Round 3 {773} | PROGRAMMING | VK Cup 2017 Round 3 + Codeforces Round #412 -- Tutorial | 1700 | |
| 1023 | Prairie Partition | binary search constructive algorithms greedy math | Statement | C | VK Cup 2017 - Round 3 {773} | PROGRAMMING | VK Cup 2017 Round 3 + Codeforces Round #412 -- Tutorial | 2300 | |
| 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 | |
| 282 | Big Number and Remainder | *special math number theory | Statement | E | VK Cup 2017 - Wild Card Round 1 {774} | PROGRAMMING | VK Cup 2017 — Уайлд-кард раунд 1 — Разбор | 2400 | |
| 6323 | Molly's Chemicals | binary search brute force data structures implementation math | Statement | C | ICM Technex 2017 and Codeforces Round 400 (Div. 1 + Div. 2, combined) {776} | PROGRAMMING | ICM Technex 2017 and Codeforces Round #400 (Div. 1 + Div. 2, combined) Editorial | 1800 | |
| 2542 | The Holmes Children | math number theory | Statement | E | ICM Technex 2017 and Codeforces Round 400 (Div. 1 + Div. 2, combined) {776} | PROGRAMMING | ICM Technex 2017 and Codeforces Round #400 (Div. 1 + Div. 2, combined) Editorial | 2100 | |
| 11017 | Shell Game | constructive algorithms implementation math | Statement | A | Codeforces Round 401 (Div. 2) {777} | PROGRAMMING | Problem analysis of Codeforces Round #401 (Div. 2) | 1100 | |
| 9784 | Pupils Redistribution | constructive algorithms math | Statement | A | Codeforces Round 402 (Div. 2) {779} | PROGRAMMING | Codeforces Round #402, Editorial | 1100 | |
| 778 | INTERCALC | *special implementation | Statement | C | April Fools Contest 2017 {784} | PROGRAMMING | 51351 | 2300 | |
| 7923 | Anton and Fairy Tale | binary search math | Statement | C | Codeforces Round 404 (Div. 2) {785} | PROGRAMMING | Editorial | 1600 | |
| 3993 | Anton and School - 2 | combinatorics dp math number theory | Statement | D | Codeforces Round 404 (Div. 2) {785} | PROGRAMMING | Editorial | 2200 | |
| 12286 | The Monster | brute force math number theory | Statement | A | Codeforces Round 406 (Div. 2) {787} | PROGRAMMING | Codeforces Round #406 Editorial | 1300 | |
| 5825 | Not Afraid | greedy implementation math | Statement | B | Codeforces Round 406 (Div. 2) {787} | PROGRAMMING | Codeforces Round #406 Editorial | 1300 | |
| 10325 | Functions again | dp two pointers | Statement | A | Codeforces Round 407 (Div. 1) {788} | PROGRAMMING | Codeforces Round #407(Div.1 + Div.2) Editorial | 1500 | |
| 9959 | Anastasia and pebbles | implementation math | Statement | A | Codeforces Round 407 (Div. 2) {789} | PROGRAMMING | Codeforces Round #407(Div.1 + Div.2) Editorial | 1100 | |
| 5090 | Masha and geometric depression | brute force implementation math | Statement | B | Codeforces Round 407 (Div. 2) {789} | PROGRAMMING | Codeforces Round #407(Div.1 + Div.2) Editorial | 1700 | |
| 5132 | Divide by Three | dp greedy math number theory | Statement | C | Educational Codeforces Round 18 {792} | PROGRAMMING | Educational Codeforces Round 18 - Editorial | 2000 | |
| 1305 | Colored Balls | greedy math number theory | Statement | E | Educational Codeforces Round 18 {792} | PROGRAMMING | Educational Codeforces Round 18 - Editorial | 2400 | |
| 8218 | Oleg and shares | implementation math | Statement | A | Tinkoff Challenge - Elimination Round {793} | PROGRAMMING | 51685 | 1000 | |
| 1402 | Mice problem | geometry implementation math sortings | Statement | C | Tinkoff Challenge - Elimination Round {793} | PROGRAMMING | 51685 | 2200 | |
| 7501 | Cutting Carrot | geometry math | Statement | B | Tinkoff Challenge - Final Round (Codeforces Round 414, rated, Div. 1 + Div. 2) {794} | PROGRAMMING | Editorial | 1300 | |
| 1238 | Choosing Carrot | games math | Statement | E | Tinkoff Challenge - Final Round (Codeforces Round 414, rated, Div. 1 + Div. 2) {794} | PROGRAMMING | 2700 | ||
| 584 | Replace All | combinatorics dp math | Statement | G | Tinkoff Challenge - Final Round (Codeforces Round 414, rated, Div. 1 + Div. 2) {794} | PROGRAMMING | 3400 | ||
| 20758 | k-Factorization | implementation math number theory | Statement | A | Educational Codeforces Round 19 {797} | PROGRAMMING | 51588 | 1100 | |
| 541 | Marmots (easy) | math | Statement | D | Helvetic Coding Contest 2017 online mirror (teams allowed, unrated) {802} | PROGRAMMING | helvetic-coding-contest-2017-editorial.pdf | 2100 | |
| 561 | Marmots (easy) | math | Statement | D1 | Helvetic Coding Contest 2017 online mirror (teams allowed, unrated) {802} | PROGRAMMING | helvetic-coding-contest-2017-editorial.pdf | 2100 | |
| 336 | Marmots (medium) | math | Statement | D2 | Helvetic Coding Contest 2017 online mirror (teams allowed, unrated) {802} | PROGRAMMING | helvetic-coding-contest-2017-editorial.pdf | 2200 | |
| 410 | 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 | |
| 295 | Marmots (medium) | math | Statement | E | 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 | |
| 156 | Marmots (hard) | math probabilities | Statement | D3 | Helvetic Coding Contest 2017 online mirror (teams allowed, unrated) {802} | PROGRAMMING | helvetic-coding-contest-2017-editorial.pdf | 2800 | |
| 151 | Marmots (hard) | math probabilities | Statement | F | Helvetic Coding Contest 2017 online mirror (teams allowed, unrated) {802} | PROGRAMMING | helvetic-coding-contest-2017-editorial.pdf | 2800 | |
| 5970 | Maximal GCD | constructive algorithms greedy math | Statement | C | Educational Codeforces Round 20 {803} | PROGRAMMING | 51768 | 2000 | |
| 16632 | Find Amir | constructive algorithms greedy math | Statement | A | Codeforces Round 411 (Div. 1) {804} | PROGRAMMING | Codeforces Round #411 Editorial | 1100 | |
| 10315 | Minimum number of steps | combinatorics greedy implementation math | Statement | B | Codeforces Round 411 (Div. 1) {804} | PROGRAMMING | Codeforces Round #411 Editorial | 1400 | |
| 19477 | Fake NP | greedy math | Statement | A | Codeforces Round 411 (Div. 2) {805} | PROGRAMMING | 51846 | 1000 | |
| 16729 | Average Sleep Time | data structures implementation math | Statement | B | Educational Codeforces Round 21 {808} | PROGRAMMING | 52010 | 1300 | |
| 4917 | Do you want a date? | implementation math sortings | Statement | A | Codeforces Round 415 (Div. 1) {809} | PROGRAMMING | 52099 | 1500 | |
| 1011 | Surprise me! | divide and conquer math number theory trees | Statement | E | Codeforces Round 415 (Div. 1) {809} | PROGRAMMING | 52099 | 3000 | |
| 9412 | Straight <<A>> | implementation math | Statement | A | Codeforces Round 415 (Div. 2) {810} | PROGRAMMING | 52099 | 1000 | |
| 4524 | The Golden Age | brute force math | Statement | B | Educational Codeforces Round 22 {813} | PROGRAMMING | 52410 | 1700 | |
| 1669 | Karen and Test | brute force combinatorics constructive algorithms math | Statement | B | Codeforces Round 419 (Div. 1) {815} | PROGRAMMING | Codeforces Round #419 Editorial | 2200 | |
| 6979 | Treasure Hunt | implementation math number theory | Statement | A | Educational Codeforces Round 23 {817} | PROGRAMMING | 52638 | 1200 | |
| 6524 | Makes And The Product | combinatorics implementation math sortings | Statement | B | Educational Codeforces Round 23 {817} | PROGRAMMING | 52638 | 1500 | |
| 8658 | Really Big Numbers | binary search brute force dp math | Statement | C | Educational Codeforces Round 23 {817} | PROGRAMMING | 52638 | 1600 | |
| 7950 | Diplomas and Certificates | implementation math | Statement | A | Educational Codeforces Round 24 {818} | PROGRAMMING | 52991 | 1000 | |
| 2002 | Level Generation | binary search math ternary search | Statement | F | Educational Codeforces Round 24 {818} | PROGRAMMING | 52991 | 2200 | |
| 1802 | Mister B and PR Shifts | data structures implementation math | Statement | B | Codeforces Round 421 (Div. 1) {819} | PROGRAMMING | Codeforces Round #421 Editorial | 2100 | |
| 5546 | Mister B and Angle in Polygon | constructive algorithms geometry math | Statement | B | Codeforces Round 421 (Div. 2) {820} | PROGRAMMING | Codeforces Round #421 Editorial | 1300 | |
| 6142 | Okabe and Banana Trees | brute force math | Statement | B | Codeforces Round 420 (Div. 2) {821} | PROGRAMMING | Tutorial | 1300 | |
| 3312 | 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 | |
| 37642 | I'm bored with life | implementation math number theory | Statement | A | Codeforces Round 422 (Div. 2) {822} | PROGRAMMING | Codeforces Round #422 (Div. 2) Editorial | 800 | |
| 1306 | Rusty String | fft math strings | Statement | E | Codeforces Round 423 (Div. 1, rated, based on VK Cup Finals) {827} | PROGRAMMING | Codeforces Round #423 Analysis | 2700 | |
| 1393 | Bamboo Partition | brute force data structures implementation math number theory sortings two pointers | Statement | C | Codeforces Round 424 (Div. 1, rated, based on VK Cup Finals) {830} | PROGRAMMING | Codeforces Round #424 Editorial | 2500 | |
| 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 | |
| 511 | Strange Radiation | binary search implementation math | Statement | C | Codeforces Round 425 (Div. 2) {832} | PROGRAMMING | Codeforces Round #425 (Div.2) Editorial | 2500 | |
| 22323 | Sasha and Sticks | games math | Statement | A | Codeforces Round 425 (Div. 2) {832} | PROGRAMMING | Codeforces Round #425 (Div.2) Editorial | 800 | |
| 6631 | The Meaningless Game | math number theory | Statement | A | Codeforces Round 426 (Div. 1) {833} | PROGRAMMING | Codeforces Round #426 Editorial | 1700 | |
| 534 | Ever-Hungry Krakozyabra | brute force combinatorics greedy math | Statement | C | Codeforces Round 426 (Div. 1) {833} | PROGRAMMING | Codeforces Round #426 Editorial | 2600 | |
| 21994 | Key races | math | Statement | A | Codeforces Round 427 (Div. 2) {835} | PROGRAMMING | Editorial | 700 | |
| 8186 | Round Subset | dp math | Statement | D | Educational Codeforces Round 26 {837} | PROGRAMMING | 53662 | 2100 | |
| 2209 | Vasya's Function | binary search implementation math | Statement | E | Educational Codeforces Round 26 {837} | PROGRAMMING | 53662 | 2200 | |
| 1104 | Prefix Sums | binary search brute force combinatorics math matrices | Statement | F | Educational Codeforces Round 26 {837} | PROGRAMMING | 53662 | 2500 | |
| 1204 | Airplane Arrangements | math number theory | Statement | D | IndiaHacks 2nd Elimination 2017 (unofficial, unrated mirror, ICPC rules) {838} | PROGRAMMING | 53736 | 2700 | |
| 3729 | Winter is here | combinatorics dp math number theory | Statement | D | Codeforces Round 428 (Div. 2) {839} | PROGRAMMING | Codeforces Round #428 editorial | 2200 | |
| 1067 | Mother of Dragons | brute force graphs math meet-in-the-middle | Statement | E | Codeforces Round 428 (Div. 2) {839} | PROGRAMMING | Codeforces Round #428 editorial | 2600 | |
| 7607 | Leha and Function | combinatorics greedy math number theory sortings | Statement | A | Codeforces Round 429 (Div. 1) {840} | PROGRAMMING | Editorial | 1300 | |
| 13304 | Godsend | games math | Statement | B | Codeforces Round 429 (Div. 2) {841} | PROGRAMMING | T | 1200 | |
| 3830 | Ilya And The Tree | dfs and similar graphs math number theory trees | Statement | C | Codeforces Round 430 (Div. 2) {842} | PROGRAMMING | Tutorial Codeforces Round #430 (Div. 2) | 2000 | |
| 6018 | Sorting by Subsequences | dfs and similar dsu implementation math sortings | Statement | A | AIM Tech Round 4 (Div. 1) {843} | PROGRAMMING | AIM Tech Round 4 -- Editorial | 1400 | |
| 417 | Upgrading Tree | constructive algorithms dfs and similar graphs math trees | Statement | C | AIM Tech Round 4 (Div. 1) {843} | PROGRAMMING | AIM Tech Round 4 -- Editorial | 2900 | |
| 9379 | Rectangles | combinatorics math | Statement | B | AIM Tech Round 4 (Div. 2) {844} | PROGRAMMING | AIM Tech Round 4 -- Editorial | 1300 | |
| 2273 | Shortest Path Problem? | dfs and similar graphs math | Statement | G | Educational Codeforces Round 27 {845} | PROGRAMMING | 53986 | 2400 | |
| 2857 | Math Show | brute force greedy | Statement | B | Educational Codeforces Round 28 {846} | PROGRAMMING | 54357 | 1800 | |
| 2746 | Random Query | data structures math probabilities two pointers | Statement | F | Educational Codeforces Round 28 {846} | PROGRAMMING | 54357 | 2000 | |
| 316 | Days of Floral Colours | combinatorics divide and conquer dp fft math | Statement | E | Codeforces Round 431 (Div. 1) {848} | PROGRAMMING | Codeforces Round #431 Editorial | 3400 | |
| 3416 | Five Dimensional Points | brute force geometry math | Statement | A | Codeforces Round 432 (Div. 1, based on IndiaHacks Final Round 2017) {850} | PROGRAMMING | Codeforces Round #432 editorial | 1700 | |
| 545 | Tournament Construction | constructive algorithms dp graphs greedy math | Statement | D | Codeforces Round 432 (Div. 1, based on IndiaHacks Final Round 2017) {850} | PROGRAMMING | Codeforces Round #432 editorial | 2700 | |
| 579 | Random Elections | bitmasks brute force divide and conquer fft math | Statement | E | Codeforces Round 432 (Div. 1, based on IndiaHacks Final Round 2017) {850} | PROGRAMMING | Codeforces Round #432 editorial | 2800 | |
| 892 | Rainbow Balls | math | Statement | F | Codeforces Round 432 (Div. 1, based on IndiaHacks Final Round 2017) {850} | PROGRAMMING | Codeforces Round #432 editorial | 2800 | |
| 5928 | Arpa and an exam about geometry | geometry math | Statement | B | Codeforces Round 432 (Div. 2, based on IndiaHacks Final Round 2017) {851} | PROGRAMMING | Codeforces Round #432 editorial | 1400 | |
| 10366 | Arpa and a research in Mexican wave | implementation math | Statement | A | Codeforces Round 432 (Div. 2, based on IndiaHacks Final Round 2017) {851} | PROGRAMMING | Codeforces Round #432 editorial | 800 | |
| 671 | Product transformation | combinatorics math number theory | Statement | F | Bubble Cup X - Finals [Online Mirror] {852} | PROGRAMMING | Tutorial | 2300 | |
| 684 | Property | greedy sortings | Statement | C | Bubble Cup X - Finals [Online Mirror] {852} | PROGRAMMING | Tutorial | 2500 | |
| 448 | Digits | brute force implementation math | Statement | A | Bubble Cup X - Finals [Online Mirror] {852} | PROGRAMMING | Tutorial | 2700 | |
| 8622 | Maxim Buys an Apartment | constructive algorithms math | Statement | B | Codeforces Round 433 (Div. 2, based on Olympiad of Metropolises) {854} | PROGRAMMING | 1200 | ||
| 14684 | Fraction | brute force constructive algorithms math | Statement | A | Codeforces Round 433 (Div. 2, based on Olympiad of Metropolises) {854} | PROGRAMMING | 900 | ||
| 754 | Eleventh Birthday | combinatorics dp math | Statement | C | Russian Code Cup 2017 - Finals [Unofficial Mirror, Div. 1 Only Recommended, Teams Allowed] {856} | PROGRAMMING | Tutorial | 2400 | |
| 130 | To Play or not to Play | greedy | Statement | F | Russian Code Cup 2017 - Finals [Unofficial Mirror, Div. 1 Only Recommended, Teams Allowed] {856} | PROGRAMMING | Tutorial | 3100 | |
| 9421 | k-rounding | brute force math number theory | Statement | A | Технокубок 2018 - Отборочный Раунд 1 {858} | PROGRAMMING | Codeforces Round 434 Div.1+Div.2 (and Technocup 2018 — Elimination Round 1) Editorial | 1200 | |
| 7992 | Lazy Security Guard | brute force geometry math | Statement | B | MemSQL Start[c]UP 3.0 - Round 1 {859} | PROGRAMMING | Tutorial | 1000 | |
| 327 | Circle of Numbers | math | Statement | G | MemSQL Start[c]UP 3.0 - Round 1 {859} | PROGRAMMING | Tutorial | 2900 | |
| 2371 | Mahmoud and Ehab and the function | binary search data structures sortings | Statement | E | Codeforces Round 435 (Div. 2) {862} | PROGRAMMING | Codeforces round #435 editorial | 2200 | |
| 6255 | Bus | greedy implementation math | Statement | C | Codeforces Round 436 (Div. 2) {864} | PROGRAMMING | 1500 | ||
| 6401 | Make a Permutation! | greedy implementation math | Statement | D | Codeforces Round 436 (Div. 2) {864} | PROGRAMMING | 1500 | ||
| 339 | Flowers and Chocolate | combinatorics math matrices | Statement | G | MemSQL Start[c]UP 3.0 - Round 2 (onsite finalists) {865} | PROGRAMMING | MemSQL Start[c]UP 3.0 Round 2 Editorial | 3200 | |
| 81 | Egg Roulette | bitmasks brute force divide and conquer math meet-in-the-middle | Statement | F | MemSQL Start[c]UP 3.0 - Round 2 (onsite finalists) {865} | PROGRAMMING | MemSQL Start[c]UP 3.0 Round 2 Editorial | 3300 | |
| 199 | El Toll Caves | math | Statement | G | Codeforces Round 438 by Sberbank and Barcelona Bootcamp (Div. 1 + Div. 2 combined) {868} | PROGRAMMING | 55046 | 3300 | |
| 15905 | The Eternal Immortality | math | Statement | B | Codeforces Round 439 (Div. 2) {869} | PROGRAMMING | Tutorial | 1100 | |
| 5331 | The Intriguing Obsession | combinatorics dp math | Statement | C | Codeforces Round 439 (Div. 2) {869} | PROGRAMMING | Tutorial | 1800 | |
| 9851 | 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 | |
| 10358 | Classroom Watch | brute force math | Statement | A | Codeforces Round 441 (Div. 1, by Moscow Team Olympiad) {875} | PROGRAMMING | Codeforces Round #441. Editorial. | 1200 | |
| 10163 | Trip For Meal | math | Statement | A | Codeforces Round 441 (Div. 2, by Moscow Team Olympiad) {876} | PROGRAMMING | Codeforces Round #441. Editorial. | 1000 | |
| 10511 | Divisiblity of Differences | implementation math number theory | Statement | B | Codeforces Round 441 (Div. 2, by Moscow Team Olympiad) {876} | PROGRAMMING | Codeforces Round #441. Editorial. | 1300 | |
| 2483 | Ann and Books | data structures flows hashing | Statement | F | Codeforces Round 442 (Div. 2) {877} | PROGRAMMING | 55362 | 2500 | |
| 3922 | Quadcopter Competition | greedy math | Statement | M | 2017-2018 ACM-ICPC, NEERC, Southern Subregional Contest (Online Mirror, ACM-ICPC Rules, Teams Preferred) {883} | PROGRAMMING | 1100 | ||
| 5241 | Bertown Subway | dfs and similar greedy math | Statement | C | Educational Codeforces Round 31 {884} | PROGRAMMING | 55470 | 1500 | |
| 1258 | Maximum Element | combinatorics dp math | Statement | E | Технокубок 2018 - Отборочный Раунд 3 {886} | PROGRAMMING | Editorial Codeforces Round 445 (and Technocup 2018 — Elimination Round 3) | 2500 | |
| 12044 | Div. 64 | implementation | Statement | A | Codeforces Round 444 (Div. 2) {887} | PROGRAMMING | Codeforces Round #444 (Div. 2) Editorial | 1100 | |
| 10984 | Almost Identity Permutations | combinatorics dp math | Statement | D | Educational Codeforces Round 32 {888} | PROGRAMMING | Educational Codeforces Round 32 - Editorial | 1600 | |
| 819 | Mod Mod Mod | binary search dp math | Statement | E | Codeforces Round 445 (Div. 1, based on Technocup 2018 Elimination Round 3) {889} | PROGRAMMING | Editorial Codeforces Round 445 (and Technocup 2018 — Elimination Round 3) | 3100 | |
| 15236 | Pride | brute force dp greedy math number theory | Statement | A | Codeforces Round 446 (Div. 1) {891} | PROGRAMMING | Codeforces Round #446 Editorial | 1600 | |
| 1284 | Lust | combinatorics math matrices | Statement | E | Codeforces Round 446 (Div. 1) {891} | PROGRAMMING | Codeforces Round #446 Editorial | 2800 | |
| 4358 | Counting Arrays | combinatorics dp math number theory | Statement | E | Educational Codeforces Round 33 (Rated for Div. 2) {893} | PROGRAMMING | 55989 | 2000 | |
| 4731 | Ralph And His Magic Field | combinatorics constructive algorithms math number theory | Statement | B | Codeforces Round 447 (Div. 2) {894} | PROGRAMMING | Codeforces Round #447 (Div.2 Only) Editorial | 1800 | |
| 4666 | Marco and GCD Sequence | constructive algorithms math | Statement | C | Codeforces Round 447 (Div. 2) {894} | PROGRAMMING | Codeforces Round #447 (Div.2 Only) Editorial | 1800 | |
| 3845 | XK Segments | binary search math sortings two pointers | Statement | B | Codeforces Round 448 (Div. 2) {895} | PROGRAMMING | Codeforces Round #448(Div.2) Editorial | 1700 | |
| 7841 | Square Subsets | bitmasks combinatorics dp math | Statement | C | Codeforces Round 448 (Div. 2) {895} | PROGRAMMING | Codeforces Round #448(Div.2) Editorial | 2000 | |
| 1287 | String Mark | combinatorics math strings | Statement | D | Codeforces Round 448 (Div. 2) {895} | PROGRAMMING | Codeforces Round #448(Div.2) Editorial | 2300 | |
| 1320 | Eyes Closed | data structures probabilities | Statement | E | Codeforces Round 448 (Div. 2) {895} | PROGRAMMING | Codeforces Round #448(Div.2) Editorial | 2500 | |
| 770 | Nephren Runs a Cinema | chinese remainder theorem combinatorics math number theory | Statement | D | Codeforces Round 449 (Div. 1) {896} | PROGRAMMING | Codeforces Round #449 Editorial | 2800 | |
| 1502 | Restoring the Expression | brute force hashing math | Statement | F | Codeforces Round 451 (Div. 2) {898} | PROGRAMMING | Codeforces Round #451 (Div.2) Editorial | 2300 | |
| 17732 | Rounding | implementation math | Statement | A | Codeforces Round 451 (Div. 2) {898} | PROGRAMMING | Codeforces Round #451 (Div.2) Editorial | 800 | |
| 9114 | Dividing the numbers | constructive algorithms graphs math | Statement | C | Codeforces Round 452 (Div. 2) {899} | PROGRAMMING | Codeforces Round #452 (Div.2) Editorial | 1300 | |
| 3284 | Shovel Sale | constructive algorithms math | Statement | D | Codeforces Round 452 (Div. 2) {899} | PROGRAMMING | Codeforces Round #452 (Div.2) Editorial | 1800 | |
| 11171 | Splitting in Teams | constructive algorithms greedy math | Statement | A | Codeforces Round 452 (Div. 2) {899} | PROGRAMMING | Codeforces Round #452 (Div.2) Editorial | 900 | |
| 8480 | Position in Fraction | math number theory | Statement | B | Codeforces Round 450 (Div. 2) {900} | PROGRAMMING | Codeforces Round #450(Div. 2). Editorial. | 1300 | |
| 5089 | Remove Extra One | brute force data structures math | Statement | C | Codeforces Round 450 (Div. 2) {900} | PROGRAMMING | Codeforces Round #450(Div. 2). Editorial. | 1700 | |
| 3983 | Unusual Sequences | bitmasks combinatorics dp math number theory | Statement | D | Codeforces Round 450 (Div. 2) {900} | PROGRAMMING | Codeforces Round #450(Div. 2). Editorial. | 2100 | |
| 1654 | GCD of Polynomials | constructive algorithms math | Statement | B | Codeforces Round 453 (Div. 1) {901} | PROGRAMMING | Codeforces Round #453 (Div. 1 & Div. 2) Editorial | 2100 | |
| 107 | Cyclic Cipher | fft math | Statement | E | Codeforces Round 453 (Div. 1) {901} | PROGRAMMING | Codeforces Round #453 (Div. 1 & Div. 2) Editorial | 3300 | |
| 5163 | Almost Difference | data structures math | Statement | D | Educational Codeforces Round 34 (Rated for Div. 2) {903} | PROGRAMMING | Educational Codeforces Round 34 Editorial | 2200 | |
| 1364 | Seating of Students | brute force constructive algorithms math | Statement | B | Codeforces Round 454 (Div. 1, based on Technocup 2018 Elimination Round 4) {906} | PROGRAMMING | Editorial Codeforces Round 454 (and Technocup 2018 — Elimination Round 4) | 2300 | |
| 2860 | Power Tower | chinese remainder theorem math number theory | Statement | D | Codeforces Round 454 (Div. 1, based on Technocup 2018 Elimination Round 4) {906} | PROGRAMMING | Editorial Codeforces Round 454 (and Technocup 2018 — Elimination Round 4) | 2600 | |
| 7266 | New Year and Curling | brute force geometry implementation math | Statement | C | Good Bye 2017 {908} | PROGRAMMING | Good Bye 2017 Editorial | 1500 | |
| 2774 | New Year and Arbitrary Arrangement | dp math probabilities | Statement | D | Good Bye 2017 {908} | PROGRAMMING | Good Bye 2017 Editorial | 2200 | |
| 878 | New Year and Entity Enumeration | bitmasks combinatorics dp math | Statement | E | Good Bye 2017 {908} | PROGRAMMING | Good Bye 2017 Editorial | 2400 | |
| 1766 | New Year and Original Order | dp math | Statement | G | Good Bye 2017 {908} | PROGRAMMING | Good Bye 2017 Editorial | 2700 | |
| 6828 | Segments | constructive algorithms math | Statement | B | Codeforces Round 455 (Div. 2) {909} | PROGRAMMING | Codeforces Round #455 (Div. 2) Editorial | 1300 | |
| 2193 | Minimum Sum | constructive algorithms greedy math | Statement | C | Testing Round 14 (Unrated) {910} | PROGRAMMING | 1700 | ||
| 5189 | Inversion Counting | brute force math | Statement | D | Educational Codeforces Round 35 (Rated for Div. 2) {911} | PROGRAMMING | T | 1700 | |
| 2260 | Prime Gift | binary search dfs and similar math meet-in-the-middle number theory two pointers | Statement | E | Codeforces Round 456 (Div. 2) {912} | PROGRAMMING | Codeforces Round #456 (Div. 2) Editorial | 2600 | |
| 24619 | Modular Exponentiation | implementation math | Statement | A | Hello 2018 {913} | PROGRAMMING | Tutorial | 1000 | |
| 847 | Strongly Connected Tournament | dp graphs math probabilities | Statement | F | Hello 2018 {913} | PROGRAMMING | Tutorial | 2700 | |
| 299 | Power Substring | math number theory | Statement | G | Hello 2018 {913} | PROGRAMMING | Tutorial | 3100 | |
| 306 | Don't Exceed | math probabilities | Statement | H | Hello 2018 {913} | PROGRAMMING | Tutorial | 3400 | |
| 15915 | Perfect Squares | brute force implementation math | Statement | A | Codecraft-18 and Codeforces Round 458 (Div. 1 + Div. 2, combined) {914} | PROGRAMMING | Tutorial | 1100 | |
| 6716 | Bash and a Tough Math Puzzle | data structures number theory | Statement | D | Codecraft-18 and Codeforces Round 458 (Div. 1 + Div. 2, combined) {914} | PROGRAMMING | Tutorial | 1900 | |
| 1275 | Sum the Fibonacci | bitmasks divide and conquer dp fft math | Statement | G | Codecraft-18 and Codeforces Round 458 (Div. 1 + Div. 2, combined) {914} | PROGRAMMING | Tutorial | 2500 | |
| 1545 | Coprime Arrays | math number theory | Statement | G | Educational Codeforces Round 36 (Rated for Div. 2) {915} | PROGRAMMING | 57123 | 2500 | |
| 9714 | Jamie and Alarm Snooze | brute force implementation math | Statement | A | Codeforces Round 457 (Div. 2) {916} | PROGRAMMING | Codeforces Round #457 (Div. 2) Editorial | 1200 | |
| 2055 | Jamie and Binary Sequence (changed after round) | bitmasks greedy math | Statement | B | Codeforces Round 457 (Div. 2) {916} | PROGRAMMING | Codeforces Round #457 (Div. 2) Editorial | 1700 | |
| 3692 | The Monster | dp greedy implementation math | Statement | A | Codeforces Round 459 (Div. 1) {917} | PROGRAMMING | Codeforces Round #459 Editorial | 1900 | |
| 1534 | Stranger Trees | dp math matrices trees | Statement | D | Codeforces Round 459 (Div. 1) {917} | PROGRAMMING | Codeforces Round #459 Editorial | 2600 | |
| 2576 | Congruence Equation | chinese remainder theorem math number theory | Statement | E | Codeforces Round 460 (Div. 2) {919} | PROGRAMMING | Codeforces Round #460 (Div. 2) Editorial | 2100 | |
| 10107 | Swap Adjacent Elements | dfs and similar greedy math sortings two pointers | Statement | C | Educational Codeforces Round 37 (Rated for Div. 2) {920} | PROGRAMMING | T | 1500 | |
| 2075 | List Of Integers | binary search bitmasks brute force combinatorics math number theory | Statement | G | Educational Codeforces Round 37 (Rated for Div. 2) {920} | PROGRAMMING | T | 2300 | |
| 5483 | Primal Sport | math number theory | Statement | A | VK Cup 2018 - Round 1 {923} | PROGRAMMING | VK Cup 2018 Round 1 and CF Round #470 (div. 1 & 2) editorial | 1700 | |
| 646 | Perpetual Subtraction | fft math matrices | Statement | E | VK Cup 2018 - Round 1 {923} | PROGRAMMING | VK Cup 2018 Round 1 and CF Round #470 (div. 1 & 2) editorial | 3100 | |
| 1453 | Big Secret | constructive algorithms math | Statement | C | VK Cup 2018 - Round 3 {925} | PROGRAMMING | Разбор VK 2018 Round 3 + Codeforces Round #477 | 2200 | |
| 4215 | 2-3-numbers | implementation math | Statement | A | VK Cup 2018 - Wild-card Round 1 {926} | PROGRAMMING | Разбор VK Cup 2018 — Уайлд-кард Раунд 1 | 1300 | |
| 1205 | Красивая команда | *special combinatorics math | Statement | C | VK Cup 2018 - Квалификация 2 {929} | PROGRAMMING | Разбор VK Cup 2018 — Квалификация 2 | 2000 | |
| 567 | Coins Exhibition | data structures dp math | Statement | E | Codeforces Round 468 (Div. 1, based on Technocup 2018 Final Round) {930} | PROGRAMMING | Codeforces Round #468 and Technocup 2018 Final Round Analysis | 2700 | |
| 3543 | Laboratory Work | implementation math | Statement | C | Codeforces Round 468 (Div. 2, based on Technocup 2018 Final Round) {931} | PROGRAMMING | Codeforces Round #468 and Technocup 2018 Final Round Analysis | 1700 | |
| 13184 | Friends Meeting | brute force greedy implementation math | Statement | A | Codeforces Round 468 (Div. 2, based on Technocup 2018 Final Round) {931} | PROGRAMMING | Codeforces Round #468 and Technocup 2018 Final Round Analysis | 800 | |
| 3646 | Team Work | combinatorics dp math | Statement | E | ICM Technex 2018 and Codeforces Round 463 (Div. 1 + Div. 2, combined) {932} | PROGRAMMING | 57796 | 2400 | |
| 2090 | A Determined Cleanup | math | Statement | B | Codeforces Round 462 (Div. 1) {933} | PROGRAMMING | 57763 | 2100 | |
| 403 | A Creative Cutout | brute force combinatorics math | Statement | D | Codeforces Round 462 (Div. 1) {933} | PROGRAMMING | 57763 | 2900 | |
| 2884 | Fafa and Ancient Alphabet | math probabilities | Statement | D | Codeforces Round 465 (Div. 2) {935} | PROGRAMMING | 1900 | ||
| 1010 | Fafa and Ancient Mathematics | dfs and similar dp trees | Statement | E | Codeforces Round 465 (Div. 2) {935} | PROGRAMMING | editorial | 2500 | |
| 4692 | Save Energy! | binary search implementation math | Statement | A | Codeforces Round 467 (Div. 1) {936} | PROGRAMMING | Codeforces Round #467, Editorial | 1700 | |
| 7316 | Vile Grasshoppers | brute force math number theory | Statement | B | Codeforces Round 467 (Div. 2) {937} | PROGRAMMING | Codeforces Round #467, Editorial | 1500 | |
| 1612 | Max History | combinatorics math | Statement | E | Educational Codeforces Round 38 (Rated for Div. 2) {938} | PROGRAMMING | Educational Codeforces Round 38 — Editorial | 2300 | |
| 4548 | Cashback | data structures dp greedy math | Statement | E | Codeforces Round 466 (Div. 2) {940} | PROGRAMMING | [Editorial] Codeforces Round #466 (Div. 2) | 2000 | |
| 11553 | Weird Subtraction Process | math number theory | Statement | B | Educational Codeforces Round 39 (Rated for Div. 2) {946} | PROGRAMMING | 58210 | 1200 | |
| 3848 | A Leapfrog in the Array | constructive algorithms math | Statement | B | Codeforces Round 469 (Div. 1) {949} | PROGRAMMING | 58291 | 1700 | |
| 16518 | Left-handers, Right-handers and Ambidexters | implementation math | Statement | A | Codeforces Round 469 (Div. 2) {950} | PROGRAMMING | 58291 | 900 | |
| 12096 | Quirky Quantifiers | math | Statement | A | April Fools Contest 2018 {952} | PROGRAMMING | April Fools Day Contest 2018: editorial | 800 | |
| 1433 | Yet Another String Matching Problem | fft math | Statement | I | Educational Codeforces Round 40 (Rated for Div. 2) {954} | PROGRAMMING | 58519 | 2600 | |
| 7065 | Feed the cat | greedy math | Statement | A | Codeforces Round 471 (Div. 2) {955} | PROGRAMMING | Editorial | 1100 | |
| 2948 | Sad powers | binary search math number theory | Statement | C | Codeforces Round 471 (Div. 2) {955} | PROGRAMMING | Editorial | 2100 | |
| 2246 | Hyperspace Jump (easy) | expression parsing math | Statement | D1 | Helvetic Coding Contest 2018 online mirror (teams allowed, unrated) {958} | PROGRAMMING | helvetic-coding-contest-2018-editorial.pdf | 1500 | |
| 1795 | Guard Duty (easy) | brute force geometry greedy math | Statement | E1 | Helvetic Coding Contest 2018 online mirror (teams allowed, unrated) {958} | PROGRAMMING | helvetic-coding-contest-2018-editorial.pdf | 1800 | |
| 3841 | Mahmoud and Ehab and the xor-MST | bitmasks dp graphs implementation math | Statement | E | Codeforces Round 473 (Div. 2) {959} | PROGRAMMING | Codeforces round #473 editorial | 1900 | |
| 3320 | Mahmoud and Ehab and another array construction task | constructive algorithms greedy math number theory | Statement | D | Codeforces Round 473 (Div. 2) {959} | PROGRAMMING | Codeforces round #473 editorial | 2000 | |
| 2998 | 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 | |
| 56891 | Mahmoud and Ehab and the even-odd game | games math | Statement | A | Codeforces Round 473 (Div. 2) {959} | PROGRAMMING | Codeforces round #473 editorial | 600 | |
| 1296 | Bandit Blues | combinatorics dp fft math | Statement | G | Divide by Zero 2018 and Codeforces Round 474 (Div. 1 + Div. 2, combined) {960} | PROGRAMMING | Divide by Zero 2018 and Codeforces Round #474 (Div. 1 + Div. 2, combined) Editorial | 2800 | |
| 1829 | Partitions | combinatorics math number theory | Statement | G | Educational Codeforces Round 41 (Rated for Div. 2) {961} | PROGRAMMING | Educational Codeforces Round 41 Editorial | 2700 | |
| 8515 | Make a Square | brute force implementation math | Statement | C | Educational Codeforces Round 42 (Rated for Div. 2) {962} | PROGRAMMING | Educational Codeforces Round 42 Editorial | 1400 | |
| 3674 | Alternating Sum | math number theory | Statement | A | Tinkoff Internship Warmup Round 2018 and Codeforces Round 475 (Div. 1) {963} | PROGRAMMING | Editorial Tinkoff Internship Warmup Round 2018 and Codeforces Round #475 (Div. 1 + Div. 2) | 1800 | |
| 707 | Cutting Rectangle | brute force math number theory | Statement | C | Tinkoff Internship Warmup Round 2018 and Codeforces Round 475 (Div. 1) {963} | PROGRAMMING | Editorial Tinkoff Internship Warmup Round 2018 and Codeforces Round #475 (Div. 1 + Div. 2) | 2600 | |
| 874 | Circles of Waiting | math | Statement | E | Tinkoff Internship Warmup Round 2018 and Codeforces Round 475 (Div. 1) {963} | PROGRAMMING | Editorial Tinkoff Internship Warmup Round 2018 and Codeforces Round #475 (Div. 1 + Div. 2) | 3100 | |
| 4610 | Messages | math | Statement | B | Tinkoff Internship Warmup Round 2018 and Codeforces Round 475 (Div. 2) {964} | PROGRAMMING | Editorial Tinkoff Internship Warmup Round 2018 and Codeforces Round #475 (Div. 1 + Div. 2) | 1300 | |
| 10406 | Splits | math | Statement | A | Tinkoff Internship Warmup Round 2018 and Codeforces Round 475 (Div. 2) {964} | PROGRAMMING | Editorial Tinkoff Internship Warmup Round 2018 and Codeforces Round #475 (Div. 1 + Div. 2) | 900 | |
| 2244 | Greedy Arkady | math | Statement | C | Codeforces Round 476 (Div. 2) [Thanks, Telegram!] {965} | PROGRAMMING | Analysis of Codeforces Round #476 (Div. 2) [Thanks, Telegram!] | 1900 | |
| 10455 | Paper Airplanes | math | Statement | A | Codeforces Round 476 (Div. 2) [Thanks, Telegram!] {965} | PROGRAMMING | Analysis of Codeforces Round #476 (Div. 2) [Thanks, Telegram!] | 900 | |
| 8001 | Watering System | math sortings | Statement | B | Codeforces Round 477 (rated, Div. 2, based on VK Cup 2018 Round 3) {967} | PROGRAMMING | Разбор VK 2018 Round 3 + Codeforces Round #477 | 1000 | |
| 2432 | Ghosts | geometry math | Statement | D | Codeforces Round 478 (Div. 2) {975} | PROGRAMMING | Codeforces Round #478 (Div. 2), Editorial | 2000 | |
| 6095 | Lara Croft and the New Game | implementation math | Statement | B | Educational Codeforces Round 43 (Rated for Div. 2) {976} | PROGRAMMING | 59195 | 1300 | |
| 20998 | Divide by three, multiply by two | dfs and similar math sortings | Statement | D | Codeforces Round 479 (Div. 3) {977} | PROGRAMMING | Codeforces Round #479 (Div. 3) Editorial | 1400 | |
| 10744 | Bus Video System | combinatorics math | Statement | E | Codeforces Round 481 (Div. 3) {978} | PROGRAMMING | T | 1400 | |
| 10126 | Almost Arithmetic Progression | brute force implementation math | Statement | D | Codeforces Round 481 (Div. 3) {978} | PROGRAMMING | T | 1500 | |
| 14799 | Pizza, Pizza, Pizza!!! | math | Statement | A | Codeforces Round 482 (Div. 2) {979} | PROGRAMMING | Codeforces Round #482 (Div. 2) Editorial | 1000 | |
| 2272 | 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 |
| 3104 | Perfect Groups | dp math number theory | Statement | D | Codeforces Round 480 (Div. 2) {980} | PROGRAMMING | Tutorial | 2100 | |
| 11044 | Links and Pearls | implementation math | Statement | A | Codeforces Round 480 (Div. 2) {980} | PROGRAMMING | Tutorial | 900 | |
| 502 | K Paths | combinatorics data structures dp fft math | Statement | H | Avito Code Challenge 2018 {981} | PROGRAMMING | Avito Code Challenge 2018 — разбор | 2900 | |
| 4865 | Finite or not? | implementation math | Statement | A | Codeforces Round 483 (Div. 1) [Thanks, Botan Investments and Victor Shaburov!] {983} | PROGRAMMING | Codeforces Round #483 [Thanks, Botan Investments and Victor Shaburov!] Editoral | 1700 | |
| 2886 | Sand Fortress | binary search constructive algorithms math | Statement | D | Educational Codeforces Round 44 (Rated for Div. 2) {985} | PROGRAMMING | Educational Codeforces Round 44 Editorial | 2100 | |
| 5107 | Petr and Permutations | combinatorics math | Statement | B | Codeforces Round 485 (Div. 1) {986} | PROGRAMMING | Codeforces Round #485 Editorial | 1800 | |
| 400 | Perfect Encoding | fft math | Statement | D | Codeforces Round 485 (Div. 1) {986} | PROGRAMMING | Codeforces Round #485 Editorial | 2600 | |
| 970 | Prince's Problem | brute force data structures math number theory trees | Statement | E | Codeforces Round 485 (Div. 1) {986} | PROGRAMMING | Codeforces Round #485 Editorial | 2900 | |
| 895 | Oppa Funcan Style Remastered | graphs math number theory shortest paths | Statement | F | Codeforces Round 485 (Div. 1) {986} | PROGRAMMING | Codeforces Round #485 Editorial | 3200 | |
| 12295 | High School: Become Human | math | Statement | B | Codeforces Round 485 (Div. 2) {987} | PROGRAMMING | Codeforces Round #485 Editorial | 1200 | |
| 8149 | Points and Powers of Two | brute force math | Statement | D | Codeforces Round 486 (Div. 3) {988} | PROGRAMMING | 59810 | 1800 | |
| 630 | A Shade of Moonlight | binary search geometry math sortings two pointers | Statement | D | Codeforces Round 487 (Div. 2) {989} | PROGRAMMING | Codeforces Round #487 (Div. 2) Editorial | 2500 |