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< 1 2 3 4 5 6 7 8 ... 13 14 15 >Solved |
Name |
Tags |
Solutions |
Index |
Contest |
Type |
Points |
Tutorial |
Rating Level |
|---|---|---|---|---|---|---|---|---|---|
| 36303 | Filling Shapes | dp math | Statement | A | Codeforces Round 566 (Div. 2) {1182} | PROGRAMMING | 67614 | 1000 | |
| 3490 | Product Oriented Recurrence | dp math matrices number theory | Statement | E | Codeforces Round 566 (Div. 2) {1182} | PROGRAMMING | 67614 | 2200 | |
| 19856 | Equalize Prices | math | Statement | B | Codeforces Round 570 (Div. 3) {1183} | PROGRAMMING | Tutorial | 1000 | |
| 15246 | Computer Game | binary search math | Statement | C | Codeforces Round 570 (Div. 3) {1183} | PROGRAMMING | Tutorial | 1400 | |
| 2303 | Topforces Strikes Back | brute force math sortings | Statement | F | Codeforces Round 570 (Div. 3) {1183} | PROGRAMMING | Tutorial | 2400 | |
| 6668 | Heidi Learns Hashing (Easy) | brute force math number theory | Statement | A1 | Helvetic Coding Contest 2019 online mirror (teams allowed, unrated) {1184} | PROGRAMMING | helvetic-coding-contest-2019-editorial.pdf | 1200 | |
| 177 | Heidi Learns Hashing (Hard) | fft math number theory | Statement | A3 | Helvetic Coding Contest 2019 online mirror (teams allowed, unrated) {1184} | PROGRAMMING | helvetic-coding-contest-2019-editorial.pdf | 3100 | |
| 169 | Parallel Universes (Hard) | math matrices | Statement | D2 | Helvetic Coding Contest 2019 online mirror (teams allowed, unrated) {1184} | PROGRAMMING | helvetic-coding-contest-2019-editorial.pdf | 3300 | |
| 7875 | Exam in BerSU (hard version) | brute force data structures greedy math | Statement | C2 | Codeforces Round 568 (Div. 2) {1185} | PROGRAMMING | Editorial for Codeforces Round #568 (Div. 2) | 1700 | |
| 7086 | Extra Element | implementation math | Statement | D | Codeforces Round 568 (Div. 2) {1185} | PROGRAMMING | Editorial for Codeforces Round #568 (Div. 2) | 1700 | |
| 15485 | Ropewalkers | math | Statement | A | Codeforces Round 568 (Div. 2) {1185} | PROGRAMMING | Editorial for Codeforces Round #568 (Div. 2) | 900 | |
| 9400 | Vus the Cossack and Numbers | constructive algorithms greedy math | Statement | D | Codeforces Round 571 (Div. 2) {1186} | PROGRAMMING | E | 1600 | |
| 6622 | Vus the Cossack and Strings | implementation math | Statement | C | Codeforces Round 571 (Div. 2) {1186} | PROGRAMMING | E | 1800 | |
| 775 | Vus the Cossack and a Field | divide and conquer implementation math | Statement | E | Codeforces Round 571 (Div. 2) {1186} | PROGRAMMING | E | 2500 | |
| 1200 | Expected Square Beauty | dp math probabilities | Statement | F | Educational Codeforces Round 67 (Rated for Div. 2) {1187} | PROGRAMMING | Разбор Educational Codeforces Round 67 | 2600 | |
| 15683 | Stickers and Toys | math | Statement | A | Educational Codeforces Round 67 (Rated for Div. 2) {1187} | PROGRAMMING | Разбор Educational Codeforces Round 67 | 900 | |
| 5424 | Count Pairs | math matrices number theory two pointers | Statement | B | Codeforces Round 572 (Div. 1) {1188} | PROGRAMMING | Editorial of Codeforces Round #572 | 2200 | |
| 15488 | Number Circle | greedy math sortings | Statement | B | Codeforces Round 572 (Div. 2) {1189} | PROGRAMMING | Editorial of Codeforces Round #572 | 1100 | |
| 11145 | Candies! | data structures dp implementation math | Statement | C | Codeforces Round 572 (Div. 2) {1189} | PROGRAMMING | Editorial of Codeforces Round #572 | 1400 | |
| 247 | Tokitsukaze and Powers | number theory probabilities | Statement | F | Codeforces Round 573 (Div. 1) {1190} | PROGRAMMING | E | 3300 | |
| 481 | Amusement Park | *special dp math | Statement | A | CEOI 2019 day 2 online mirror (unrated, IOI format) {1193} | PROGRAMMING | T | ||
| 7397 | 1-2-K Game | games math | Statement | D | Educational Codeforces Round 68 (Rated for Div. 2) {1194} | PROGRAMMING | Разбор Educational Codeforces Round 68 | 1700 | |
| 17549 | Remove a Progression | math | Statement | A | Educational Codeforces Round 68 (Rated for Div. 2) {1194} | PROGRAMMING | Разбор Educational Codeforces Round 68 | 800 | |
| 22232 | Sport Mafia | binary search brute force math | Statement | B | Codeforces Round 574 (Div. 2) {1195} | PROGRAMMING | Разбор Codeforces Round #574 (Div. 2) | 1100 | |
| 14385 | Drinks Choosing | greedy math | Statement | A | Codeforces Round 574 (Div. 2) {1195} | PROGRAMMING | Разбор Codeforces Round #574 (Div. 2) | 1100 | |
| 8249 | Submarine in the Rybinsk Sea (easy edition) | combinatorics math number theory | Statement | D1 | Codeforces Round 574 (Div. 2) {1195} | PROGRAMMING | Разбор Codeforces Round #574 (Div. 2) | 1500 | |
| 4928 | Submarine in the Rybinsk Sea (hard edition) | combinatorics math number theory | Statement | D2 | Codeforces Round 574 (Div. 2) {1195} | PROGRAMMING | Разбор Codeforces Round #574 (Div. 2) | 1700 | |
| 1120 | Geometers Anonymous Club | data structures geometry math sortings | Statement | F | Codeforces Round 574 (Div. 2) {1195} | PROGRAMMING | Разбор Codeforces Round #574 (Div. 2) | 2700 | |
| 17687 | Odd Sum Segments | constructive algorithms math | Statement | B | Codeforces Round 575 (Div. 3) {1196} | PROGRAMMING | Editorial | 1200 | |
| 29345 | Three Piles of Candies | brute force constructive algorithms math | Statement | A | Codeforces Round 575 (Div. 3) {1196} | PROGRAMMING | Editorial | 700 | |
| 14115 | DIY Wooden Ladder | greedy math sortings | Statement | A | Educational Codeforces Round 69 (Rated for Div. 2) {1197} | PROGRAMMING | E | 1000 | |
| 5861 | Yet Another Subarray Problem | dp greedy math | Statement | D | Educational Codeforces Round 69 (Rated for Div. 2) {1197} | PROGRAMMING | E | 1900 | |
| 22749 | Water Lily | geometry math | Statement | B | Codeforces Round 576 (Div. 2) {1199} | PROGRAMMING | E | 1000 | |
| 10714 | Round Corridor | math number theory | Statement | C | Codeforces Round 578 (Div. 2) {1200} | PROGRAMMING | Codeforces Round #578 (Div. 2) Editorial | 1500 | |
| 1245 | 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 | |
| 36388 | Maximum Median | binary search greedy math sortings | Statement | C | Codeforces Round 577 (Div. 2) {1201} | PROGRAMMING | Codeforces Round #577 (Div 2) Editorial | 1400 | |
| 26857 | Zero Array | greedy math | Statement | B | Codeforces Round 577 (Div. 2) {1201} | PROGRAMMING | Codeforces Round #577 (Div 2) Editorial | 1500 | |
| 5538 | Print a 1337-string... | combinatorics constructive algorithms math strings | Statement | D | Educational Codeforces Round 70 (Rated for Div. 2) {1202} | PROGRAMMING | 68972 | 1900 | |
| 2806 | 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 | |
| 667 | You Are Given Some Letters... | binary search implementation math | Statement | F | Educational Codeforces Round 70 (Rated for Div. 2) {1202} | PROGRAMMING | 68972 | 2800 | |
| 17112 | Equal Rectangles | greedy math | Statement | B | Codeforces Round 579 (Div. 3) {1203} | PROGRAMMING | Codeforces Round #579 (Div. 3) Editorial | 1200 | |
| 25437 | Common Divisors | implementation math | Statement | C | Codeforces Round 579 (Div. 3) {1203} | PROGRAMMING | Codeforces Round #579 (Div. 3) Editorial | 1300 | |
| 18450 | Mislove Has Lost an Array | greedy math | Statement | B | Codeforces Round 581 (Div. 2) {1204} | PROGRAMMING | 69244 | 1000 | |
| 22557 | BowWow and the Timetable | math | Statement | A | Codeforces Round 581 (Div. 2) {1204} | PROGRAMMING | 69244 | 1100 | |
| 3431 | Kirk and a Binary String (hard version) | data structures greedy math strings | Statement | D2 | Codeforces Round 581 (Div. 2) {1204} | PROGRAMMING | 69244 | 2100 | |
| 2302 | Natasha, Sasha and the Prefix Sums | combinatorics dp math number theory | Statement | E | Codeforces Round 581 (Div. 2) {1204} | PROGRAMMING | 69244 | 2400 | |
| 14808 | Almost Equal | constructive algorithms greedy math | Statement | A | Codeforces Round 580 (Div. 1) {1205} | PROGRAMMING | 69158 | 1300 | |
| 191 | Beauty of a Permutation | constructive algorithms math | Statement | F | Codeforces Round 580 (Div. 1) {1205} | PROGRAMMING | 69158 | 3400 | |
| 26263 | Choose Two Numbers | math sortings | Statement | A | Codeforces Round 580 (Div. 2) {1206} | PROGRAMMING | Editorial of Codeforces Round #580 | 800 | |
| 6809 | XOR Guessing | bitmasks interactive math | Statement | E | Educational Codeforces Round 71 (Rated for Div. 2) {1207} | PROGRAMMING | Educational Codeforces Round 71 Editorial | 1800 | |
| 23626 | There Are Two Types Of Burgers | brute force greedy implementation math | Statement | A | Educational Codeforces Round 71 (Rated for Div. 2) {1207} | PROGRAMMING | Educational Codeforces Round 71 Editorial | 700 | |
| 983 | Polygons | greedy math number theory | Statement | G | Manthan, Codefest 19 (open for everyone, rated, Div. 1 + Div. 2) {1208} | PROGRAMMING | 69357 | 2700 | |
| 18330 | XORinacci | math | Statement | A | Manthan, Codefest 19 (open for everyone, rated, Div. 1 + Div. 2) {1208} | PROGRAMMING | 69357 | 900 | |
| 8601 | Koala and Lights | implementation math number theory | Statement | B | Codeforces Round 584 - Dasha Code Championship - Elimination Round (rated, open for everyone, Div. 1 + Div. 2) {1209} | PROGRAMMING | 69791 | 1300 | |
| 373 | Moving Walkways | data structures greedy math | Statement | H | Codeforces Round 584 - Dasha Code Championship - Elimination Round (rated, open for everyone, Div. 1 + Div. 2) {1209} | PROGRAMMING | 69791 | 3300 | |
| 12951 | Paint the Numbers | greedy implementation math | Statement | A | Codeforces Round 584 - Dasha Code Championship - Elimination Round (rated, open for everyone, Div. 1 + Div. 2) {1209} | PROGRAMMING | 69791 | 900 | |
| 3669 | Kamil and Making a Stream | math number theory trees | Statement | C | Dasha Code Championship - SPb Finals Round (only for onsite-finalists) {1210} | PROGRAMMING | Dasha Code Championship Finals and Mirror Round 588 Editorial | 2100 | |
| 472 | Wojtek and Card Tricks | math | Statement | E | Dasha Code Championship - SPb Finals Round (only for onsite-finalists) {1210} | PROGRAMMING | Dasha Code Championship Finals and Mirror Round 588 Editorial | 2700 | |
| 503 | Marek and Matching (easy version) | brute force probabilities | Statement | F1 | Dasha Code Championship - SPb Finals Round (only for onsite-finalists) {1210} | PROGRAMMING | Dasha Code Championship Finals and Mirror Round 588 Editorial | 2900 | |
| 529 | Marek and Matching (hard version) | brute force probabilities | Statement | F2 | Dasha Code Championship - SPb Finals Round (only for onsite-finalists) {1210} | PROGRAMMING | Dasha Code Championship Finals and Mirror Round 588 Editorial | 3100 | |
| 254 | Teams | *special binary search greedy math | Statement | D | Kotlin Heroes: Episode 2 {1211} | PROGRAMMING | Kotlin Heroes: Episode 2 Editorial | 2200 | |
| 89 | King's Path | *special math trees | Statement | G | Kotlin Heroes: Episode 2 {1211} | PROGRAMMING | Kotlin Heroes: Episode 2 Editorial | 2500 | |
| 19802 | Book Reading | math | Statement | C | Codeforces Round 582 (Div. 3) {1213} | PROGRAMMING | Codeforces Round #582 (Div. 3) Editorial | 1200 | |
| 12429 | Equalizing by Division (hard version) | brute force math sortings | Statement | D2 | Codeforces Round 582 (Div. 3) {1213} | PROGRAMMING | Codeforces Round #582 (Div. 3) Editorial | 1600 | |
| 25830 | Chips Moving | math | Statement | A | Codeforces Round 582 (Div. 3) {1213} | PROGRAMMING | Codeforces Round #582 (Div. 3) Editorial | 900 | |
| 11550 | Badges | brute force math | Statement | B | Codeforces Round 583 (Div. 1 + Div. 2, based on Olympiad of Metropolises) {1214} | PROGRAMMING | Tutorial | 1100 | |
| 9542 | Optimal Currency Exchange | brute force math | Statement | A | Codeforces Round 583 (Div. 1 + Div. 2, based on Olympiad of Metropolises) {1214} | PROGRAMMING | Tutorial | 1300 | |
| 2890 | Petya and Construction Set | constructive algorithms graphs math sortings trees | Statement | E | Codeforces Round 583 (Div. 1 + Div. 2, based on Olympiad of Metropolises) {1214} | PROGRAMMING | Tutorial | 2000 | |
| 12328 | Yellow Cards | greedy implementation math | Statement | A | Codeforces Round 585 (Div. 2) {1215} | PROGRAMMING | Codeforces Round #585 Editorial | 1000 | |
| 6635 | Ticket Game | games greedy math | Statement | D | Codeforces Round 585 (Div. 2) {1215} | PROGRAMMING | Codeforces Round #585 Editorial | 1700 | |
| 12481 | Swords | math | Statement | D | Codeforces Round 587 (Div. 3) {1216} | PROGRAMMING | Codeforces Round #587 (Div. 3) Editorial | 1300 | |
| 10600 | White Sheet | geometry math | Statement | C | Codeforces Round 587 (Div. 3) {1216} | PROGRAMMING | Codeforces Round #587 (Div. 3) Editorial | 1500 | |
| 3798 | Numerical Sequence (easy version) | binary search brute force math | Statement | E1 | Codeforces Round 587 (Div. 3) {1216} | PROGRAMMING | Codeforces Round #587 (Div. 3) Editorial | 1900 | |
| 1705 | Numerical Sequence (hard version) | binary search math | Statement | E2 | Codeforces Round 587 (Div. 3) {1216} | PROGRAMMING | Codeforces Round #587 (Div. 3) Editorial | 2300 | |
| 15893 | Creating a Character | binary search math | Statement | A | Educational Codeforces Round 72 (Rated for Div. 2) {1217} | PROGRAMMING | Educational Codeforces Round 72 Editorial | 1300 | |
| 11925 | Zmei Gorynich | greedy math | Statement | B | Educational Codeforces Round 72 (Rated for Div. 2) {1217} | PROGRAMMING | Educational Codeforces Round 72 Editorial | 1600 | |
| 2130 | Sum Queries? | data structures greedy implementation math | Statement | E | Educational Codeforces Round 72 (Rated for Div. 2) {1217} | PROGRAMMING | Educational Codeforces Round 72 Editorial | 2300 | |
| 12203 | Multiplication Table | math number theory | Statement | B | Codeforces Round 586 (Div. 1 + Div. 2) {1220} | PROGRAMMING | Codeforces Round #586 Editorial | 1300 | |
| 4153 | Alex and Julian | bitmasks math number theory | Statement | D | Codeforces Round 586 (Div. 1 + Div. 2) {1220} | PROGRAMMING | Codeforces Round #586 Editorial | 1900 | |
| 18363 | 2048 Game | brute force greedy math | Statement | A | Educational Codeforces Round 73 (Rated for Div. 2) {1221} | PROGRAMMING | Разбор Educational Codeforces Round 73 | 1000 | |
| 25263 | Perfect Team | binary search math | Statement | C | Educational Codeforces Round 73 (Rated for Div. 2) {1221} | PROGRAMMING | Разбор Educational Codeforces Round 73 | 1200 | |
| 431 | Wooden Raft | binary search math number theory | Statement | G | Technocup 2020 - Elimination Round 1 {1223} | PROGRAMMING | Сodeforces Round 591 (and Technocup 2020 — Elimination Round 1) Editorial | 3100 | |
| 22415 | CME | math | Statement | A | Technocup 2020 - Elimination Round 1 {1223} | PROGRAMMING | Сodeforces Round 591 (and Technocup 2020 — Elimination Round 1) Editorial | 600 | |
| 9946 | p-binary | bitmasks brute force math | Statement | C | Technocup 2020 - Elimination Round 2 {1225} | PROGRAMMING | 70898 | 1600 | |
| 10568 | Power Products | hashing math number theory | Statement | D | Technocup 2020 - Elimination Round 2 {1225} | PROGRAMMING | 70898 | 1900 | |
| 16742 | Forgetting Things | math | Statement | A | Technocup 2020 - Elimination Round 2 {1225} | PROGRAMMING | 70898 | 900 | |
| 10335 | Math Problem | math | Statement | A | Technocup 2020 - Elimination Round 3 {1227} | PROGRAMMING | Разбор задач №2 | 1100 | |
| 1988 | Wrong Answer on test 233 (Hard Version) | combinatorics math | Statement | F2 | Technocup 2020 - Elimination Round 3 {1227} | PROGRAMMING | Разбор задач №2 | 2400 | |
| 11965 | Filling the Grid | implementation math | Statement | B | Codeforces Round 589 (Div. 2) {1228} | PROGRAMMING | 70162 | 1300 | |
| 9788 | Primes and Multiplication | math number theory | Statement | C | Codeforces Round 589 (Div. 2) {1228} | PROGRAMMING | 70162 | 1600 | |
| 3713 | Another Filling the Grid | combinatorics dp math | Statement | E | Codeforces Round 589 (Div. 2) {1228} | PROGRAMMING | 70162 | 2300 | |
| 3094 | Special Permutations | math | Statement | E | Codeforces Round 590 (Div. 3) {1234} | PROGRAMMING | Codeforces Round #590 (Div. 3) Editorial | 2000 | |
| 29789 | Equalize Prices Again | math | Statement | A | Codeforces Round 590 (Div. 3) {1234} | PROGRAMMING | Codeforces Round #590 (Div. 3) Editorial | 900 | |
| 12229 | Alice and the List of Presents | combinatorics math | Statement | B | Codeforces Round 593 (Div. 2) {1236} | PROGRAMMING | 70654 | 1400 | |
| 437 | Alice and the Cactus | dfs and similar graphs math probabilities | Statement | F | Codeforces Round 593 (Div. 2) {1236} | PROGRAMMING | 70654 | 2900 | |
| 17352 | Stones | brute force greedy math | Statement | A | Codeforces Round 593 (Div. 2) {1236} | PROGRAMMING | 70654 | 800 | |
| 22581 | Balanced Rating Changes | implementation math | Statement | A | Codeforces Global Round 5 {1237} | PROGRAMMING | T | 1100 | |
| 1747 | Balanced Binary Search Trees | dp math | Statement | E | Codeforces Global Round 5 {1237} | PROGRAMMING | T | 2400 | |
| 7896 | Standard Free2play | dp greedy math | Statement | C | Educational Codeforces Round 74 (Rated for Div. 2) {1238} | PROGRAMMING | Educational Codeforces Round 74 Editorial | 1600 | |
| 28662 | Prime Subtraction | math number theory | Statement | A | Educational Codeforces Round 74 (Rated for Div. 2) {1238} | PROGRAMMING | Educational Codeforces Round 74 Editorial | 900 | |
| 7908 | Ivan the Fool and the Probability Theory | combinatorics dp math | Statement | A | Codeforces Round 594 (Div. 1) {1239} | PROGRAMMING | Editorial of Codeforces Round #594 (on the problems of Moscow Team Olympiad) | 1700 | |
| 13344 | Tile Painting | constructive algorithms math number theory | Statement | A | Codeforces Round 599 (Div. 1) {1242} | PROGRAMMING | Codeforces Round #599 Editorial | 1500 | |
| 9763 | 0-1 MST | dfs and similar dsu graphs sortings | Statement | B | Codeforces Round 599 (Div. 1) {1242} | PROGRAMMING | Codeforces Round #599 Editorial | 1900 | |
| 254 | Number Discovery | math | Statement | D | Codeforces Round 599 (Div. 1) {1242} | PROGRAMMING | Codeforces Round #599 Editorial | 3400 | |
| 8489 | The Football Season | brute force math number theory | Statement | C | Codeforces Round 592 (Div. 2) {1244} | PROGRAMMING | Codeforces Round #592 (Div. 2) Tutorial | 1900 | |
| 1581 | Running in Pairs | constructive algorithms greedy math | Statement | G | Codeforces Round 592 (Div. 2) {1244} | PROGRAMMING | Codeforces Round #592 (Div. 2) Tutorial | 2500 | |
| 20215 | Pens and Pencils | math | Statement | A | Codeforces Round 592 (Div. 2) {1244} | PROGRAMMING | Codeforces Round #592 (Div. 2) Tutorial | 700 | |
| 15008 | Good ol' Numbers Coloring | math number theory | Statement | A | Codeforces Round 597 (Div. 2) {1245} | PROGRAMMING | Codeforces Round #597 (Div. 2) Editorial | 1000 | |
| 219 | Cursor Distance | Statement | F | Codeforces Round 596 (Div. 1, based on Technocup 2020 Elimination Round 2) {1246} | PROGRAMMING | Tutorial | 3400 | ||
| 15170 | Integer Points | geometry math | Statement | A | Codeforces Round 594 (Div. 2) {1248} | PROGRAMMING | Editorial of Codeforces Round #594 (on the problems of Moscow Team Olympiad) | 900 | |
| 18155 | Grow The Tree | greedy math sortings | Statement | B | Codeforces Round 594 (Div. 2) {1248} | PROGRAMMING | Editorial of Codeforces Round #594 (on the problems of Moscow Team Olympiad) | 900 | |
| 22613 | Books Exchange (easy version) | dsu math | Statement | B1 | Codeforces Round 595 (Div. 3) {1249} | PROGRAMMING | Codeforces Round #595 (Div. 3) Editorial | 1000 | |
| 18723 | Books Exchange (hard version) | dfs and similar dsu math | Statement | B2 | Codeforces Round 595 (Div. 3) {1249} | PROGRAMMING | Codeforces Round #595 (Div. 3) Editorial | 1300 | |
| 13747 | Good Numbers (hard version) | binary search greedy math meet-in-the-middle | Statement | C2 | Codeforces Round 595 (Div. 3) {1249} | PROGRAMMING | Codeforces Round #595 (Div. 3) Editorial | 1500 | |
| 23842 | Yet Another Dividing into Teams | math | Statement | A | Codeforces Round 595 (Div. 3) {1249} | PROGRAMMING | Codeforces Round #595 (Div. 3) Editorial | 900 | |
| 4343 | Happy Birthday | math | Statement | H | 2019-2020 ICPC, NERC, Southern and Volga Russian Regional Contest (Online Mirror, ICPC Rules, Teams Preferred) {1250} | PROGRAMMING | 1500 | ||
| 4787 | Divide The Students | binary search greedy math | Statement | L | 2019-2020 ICPC, NERC, Southern and Volga Russian Regional Contest (Online Mirror, ICPC Rules, Teams Preferred) {1250} | PROGRAMMING | 1700 | ||
| 2832 | The Feast and the Bus | brute force constructive algorithms greedy math | Statement | B | 2019-2020 ICPC, NERC, Southern and Volga Russian Regional Contest (Online Mirror, ICPC Rules, Teams Preferred) {1250} | PROGRAMMING | 1900 | ||
| 2124 | Addition Robot | data structures math matrices | Statement | K | 2019-2020 ICPC, Asia Jakarta Regional Contest (Online Mirror, ICPC Rules, Teams Preferred) {1252} | PROGRAMMING | T | 2200 | |
| 1393 | Songwriter | greedy two pointers | Statement | E | 2019-2020 ICPC, Asia Jakarta Regional Contest (Online Mirror, ICPC Rules, Teams Preferred) {1252} | PROGRAMMING | T | 2300 | |
| 15659 | Sweets Eating | dp greedy math sortings | Statement | C | Codeforces Round 600 (Div. 2) {1253} | PROGRAMMING | Editorial | 1500 | |
| 5099 | Send Boxes to Alice (Easy Version) | constructive algorithms greedy math number theory ternary search two pointers | Statement | B1 | Codeforces Round 601 (Div. 1) {1254} | PROGRAMMING | Codeforces Round #601 Editorial | 2000 | |
| 3574 | Send Boxes to Alice (Hard Version) | constructive algorithms greedy math number theory ternary search two pointers | Statement | B2 | Codeforces Round 601 (Div. 1) {1254} | PROGRAMMING | Codeforces Round #601 Editorial | 2100 | |
| 1832 | Point Ordering | constructive algorithms geometry interactive math | Statement | C | Codeforces Round 601 (Div. 1) {1254} | PROGRAMMING | Codeforces Round #601 Editorial | 2300 | |
| 1743 | Tree Queries | data structures probabilities trees | Statement | D | Codeforces Round 601 (Div. 1) {1254} | PROGRAMMING | Codeforces Round #601 Editorial | 2600 | |
| 18129 | Changing Volume | math | Statement | A | Codeforces Round 601 (Div. 2) {1255} | PROGRAMMING | Codeforces Round #601 Editorial | 800 | |
| 32797 | Payment Without Change | math | Statement | A | Codeforces Round 598 (Div. 3) {1256} | PROGRAMMING | Codeforces Round #598 (Div. 3) Editorial | 1000 | |
| 22757 | Magic Stick | math | Statement | B | Educational Codeforces Round 76 (Rated for Div. 2) {1257} | PROGRAMMING | Educational Codeforces Round 76 Editorial | 1000 | |
| 806 | Divisor Set | divide and conquer fft greedy math number theory | Statement | G | Educational Codeforces Round 76 (Rated for Div. 2) {1257} | PROGRAMMING | Educational Codeforces Round 76 Editorial | 2700 | |
| 21755 | Two Rival Students | greedy math | Statement | A | Educational Codeforces Round 76 (Rated for Div. 2) {1257} | PROGRAMMING | Educational Codeforces Round 76 Editorial | 700 | |
| 16094 | Heating | math | Statement | A | Educational Codeforces Round 77 (Rated for Div. 2) {1260} | PROGRAMMING | Educational Codeforces Round 77 Editorial | 1000 | |
| 16917 | Obtain Two Zeroes | binary search math | Statement | B | Educational Codeforces Round 77 (Rated for Div. 2) {1260} | PROGRAMMING | Educational Codeforces Round 77 Editorial | 1200 | |
| 8961 | Infinite Fence | greedy math number theory | Statement | C | Educational Codeforces Round 77 (Rated for Div. 2) {1260} | PROGRAMMING | Educational Codeforces Round 77 Editorial | 1700 | |
| 538 | Xor-Set | bitmasks divide and conquer math | Statement | F | Codeforces Round 602 (Div. 1, based on Technocup 2020 Elimination Round 3) {1261} | PROGRAMMING | Tutorial | 3100 | |
| 17391 | Sweet Problem | math | Statement | A | Codeforces Round 603 (Div. 2) {1263} | PROGRAMMING | Разбор Codeforces Round #603 (Div. 2) | 1200 | |
| 14827 | Everyone is a Winner! | binary search math meet-in-the-middle number theory | Statement | C | Codeforces Round 603 (Div. 2) {1263} | PROGRAMMING | Разбор Codeforces Round #603 (Div. 2) | 1400 | |
| 13693 | Beautiful Numbers | data structures implementation math two pointers | Statement | B | Codeforces Round 604 (Div. 2) {1265} | PROGRAMMING | Codeforces Round #604 Editorial | 1300 | |
| 4760 | Beautiful Mirrors | data structures dp math probabilities | Statement | E | Codeforces Round 604 (Div. 2) {1265} | PROGRAMMING | Codeforces Round #604 Editorial | 2100 | |
| 17845 | Competitive Programmer | chinese remainder theorem math | Statement | A | Codeforces Global Round 6 {1266} | PROGRAMMING | Codeforces Global Round 6 Editorial | 1000 | |
| 16763 | Dice Tower | constructive algorithms math | Statement | B | Codeforces Global Round 6 {1266} | PROGRAMMING | Codeforces Global Round 6 Editorial | 1000 | |
| 10122 | Diverse Matrix | constructive algorithms greedy math number theory | Statement | C | Codeforces Global Round 6 {1266} | PROGRAMMING | Codeforces Global Round 6 Editorial | 1400 | |
| 3972 | Decreasing Debts | constructive algorithms data structures graphs greedy implementation math two pointers | Statement | D | Codeforces Global Round 6 {1266} | PROGRAMMING | Codeforces Global Round 6 Editorial | 2000 | |
| 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 | |
| 3132 | Just Arrange the Icons | greedy implementation math | Statement | J | 2019-2020 ICPC, NERC, Northern Eurasia Finals (Unrated, Online Mirror, ICPC Rules, Teams Preferred) {1267} | PROGRAMMING | nerc-2019-tutorial.pdf | 1900 | |
| 2187 | Key Storage | combinatorics math | Statement | K | 2019-2020 ICPC, NERC, Northern Eurasia Finals (Unrated, Online Mirror, ICPC Rules, Teams Preferred) {1267} | PROGRAMMING | nerc-2019-tutorial.pdf | 2200 | |
| 873 | Game Relics | math probabilities | Statement | G | 2019-2020 ICPC, NERC, Northern Eurasia Finals (Unrated, Online Mirror, ICPC Rules, Teams Preferred) {1267} | PROGRAMMING | nerc-2019-tutorial.pdf | 3100 | |
| 6583 | Domino for Young | dp greedy math | Statement | B | Codeforces Round 609 (Div. 1) {1268} | PROGRAMMING | Codeforces Round #609 — Editorial | 2000 | |
| 964 | Invertation in Tournament | brute force divide and conquer graphs math | Statement | D | Codeforces Round 609 (Div. 1) {1268} | PROGRAMMING | Codeforces Round #609 — Editorial | 3100 | |
| 24593 | Equation | brute force math | Statement | A | Codeforces Round 609 (Div. 2) {1269} | PROGRAMMING | Codeforces Round #609 — Editorial | 800 | |
| 17586 | Interesting Subarray | constructive algorithms greedy math | Statement | B | Good Bye 2019 {1270} | PROGRAMMING | Разбор Goodbye 2019 | 1300 | |
| 15224 | Make Good | bitmasks constructive algorithms math | Statement | C | Good Bye 2019 {1270} | PROGRAMMING | Разбор Goodbye 2019 | 1500 | |
| 5011 | Strange Device | constructive algorithms interactive math sortings | Statement | D | Good Bye 2019 {1270} | PROGRAMMING | Разбор Goodbye 2019 | 1900 | |
| 2786 | Divide Points | constructive algorithms geometry math | Statement | E | Good Bye 2019 {1270} | PROGRAMMING | Разбор Goodbye 2019 | 2300 | |
| 1389 | Awesome Substrings | math strings | Statement | F | Good Bye 2019 {1270} | PROGRAMMING | Разбор Goodbye 2019 | 2600 | |
| 3222 | Subset with Zero Sum | constructive algorithms dfs and similar graphs math | Statement | G | Good Bye 2019 {1270} | PROGRAMMING | Разбор Goodbye 2019 | 2700 | |
| 417 | Xor on Figures | constructive algorithms fft math | Statement | I | Good Bye 2019 {1270} | PROGRAMMING | Разбор Goodbye 2019 | 3400 | |
| 17915 | Card Game | games greedy math | Statement | A | Good Bye 2019 {1270} | PROGRAMMING | Разбор Goodbye 2019 | 700 | |
| 12161 | Blocks | greedy math | Statement | B | Codeforces Round 608 (Div. 2) {1271} | PROGRAMMING | 72247 | 1300 | |
| 3838 | Common Number | binary search combinatorics dp math | Statement | E | Codeforces Round 608 (Div. 2) {1271} | PROGRAMMING | 72247 | 2100 | |
| 323 | Divide The Students | brute force | Statement | F | Codeforces Round 608 (Div. 2) {1271} | PROGRAMMING | 72247 | 3000 | |
| 15746 | Suits | brute force greedy math | Statement | A | Codeforces Round 608 (Div. 2) {1271} | PROGRAMMING | 72247 | 900 | |
| 22270 | Three Friends | brute force greedy math sortings | Statement | A | Codeforces Round 605 (Div. 3) {1272} | PROGRAMMING | Codeforces Round #605 (Div. 3) Editorial | 900 | |
| 1804 | Beautiful Rectangle | brute force combinatorics constructive algorithms data structures greedy math | Statement | C | Codeforces Round 606 (Div. 1, based on Technocup 2020 Elimination Round 4) {1276} | PROGRAMMING | Technocup 2020 — Elimination Round 4 + Codeforces Round 606: Editorial | 2300 | |
| 604 | Asterisk Substrings | string suffix structures | Statement | F | Codeforces Round 606 (Div. 1, based on Technocup 2020 Elimination Round 4) {1276} | PROGRAMMING | Technocup 2020 — Elimination Round 4 + Codeforces Round 606: Editorial | 3300 | |
| 3287 | Let's Play the Words? | data structures hashing implementation math | Statement | D | Codeforces Round 606 (Div. 2, based on Technocup 2020 Elimination Round 4) {1277} | PROGRAMMING | Technocup 2020 — Elimination Round 4 + Codeforces Round 606: Editorial | 1800 | |
| 14314 | A and B | greedy math | Statement | B | Educational Codeforces Round 78 (Rated for Div. 2) {1278} | PROGRAMMING | Educational Codeforces Round 78 Editorial | 1500 | |
| 2894 | 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 | |
| 18019 | New Year Garland | math | Statement | A | Educational Codeforces Round 79 (Rated for Div. 2) {1279} | PROGRAMMING | Educational Codeforces Round 79 Editorial | 1000 | |
| 7580 | Santa's Bot | combinatorics math probabilities | Statement | D | Educational Codeforces Round 79 (Rated for Div. 2) {1279} | PROGRAMMING | Educational Codeforces Round 79 Editorial | 1700 | |
| 5896 | Cut and Paste | implementation math | Statement | A | Codeforces Round 607 (Div. 1) {1280} | PROGRAMMING | Codeforces Round #607 Editorial | 1700 | |
| 4228 | Beingawesomeism | implementation math | Statement | B | Codeforces Round 607 (Div. 1) {1280} | PROGRAMMING | Codeforces Round #607 Editorial | 1800 | |
| 1307 | Miss Punyverse | dp greedy trees | Statement | D | Codeforces Round 607 (Div. 1) {1280} | PROGRAMMING | Codeforces Round #607 Editorial | 2700 | |
| 274 | Kirchhoff's Current Loss | math | Statement | E | Codeforces Round 607 (Div. 1) {1280} | PROGRAMMING | Codeforces Round #607 Editorial | 2900 | |
| 115 | Intergalactic Sliding Puzzle | combinatorics constructive algorithms math | Statement | F | Codeforces Round 607 (Div. 1) {1280} | PROGRAMMING | Codeforces Round #607 Editorial | 3400 | |
| 4710 | Petya and Exam | greedy sortings two pointers | Statement | C | Codeforces Round 610 (Div. 2) {1282} | PROGRAMMING | 72461 | 1800 | |
| 15579 | Temporarily unavailable | implementation math | Statement | A | Codeforces Round 610 (Div. 2) {1282} | PROGRAMMING | 72461 | 900 | |
| 23243 | Candies Division | math | Statement | B | Codeforces Round 611 (Div. 3) {1283} | PROGRAMMING | Codeforces Round #611 (Div. 3) Editorial | 1000 | |
| 14293 | Friends and Gifts | constructive algorithms data structures math | Statement | C | Codeforces Round 611 (Div. 3) {1283} | PROGRAMMING | Codeforces Round #611 (Div. 3) Editorial | 1500 | |
| 62505 | Minutes Before the New Year | math | Statement | A | Codeforces Round 611 (Div. 3) {1283} | PROGRAMMING | Codeforces Round #611 (Div. 3) Editorial | 800 | |
| 9005 | New Year and Permutation | combinatorics math | Statement | C | Hello 2020 {1284} | PROGRAMMING | Hello 2020 Editorial | 1700 | |
| 1436 | New Year and Castle Construction | combinatorics geometry math sortings | Statement | E | Hello 2020 {1284} | PROGRAMMING | Hello 2020 Editorial | 2500 | |
| 427 | New Year and Social Network | data structures graph matchings graphs math trees | Statement | F | Hello 2020 {1284} | PROGRAMMING | Hello 2020 Editorial | 3100 | |
| 29083 | Fadi and LCM | brute force math number theory | Statement | C | Codeforces Round 613 (Div. 2) {1285} | PROGRAMMING | Codeforces Round #613 (Div. 2) Editorial | 1400 | |
| 30164 | Mezo Playing Zoma | math | Statement | A | Codeforces Round 613 (Div. 2) {1285} | PROGRAMMING | Codeforces Round #613 (Div. 2) Editorial | 700 | |
| 1629 | Madhouse (Easy version) | brute force constructive algorithms interactive math | Statement | C1 | Codeforces Round 612 (Div. 1) {1286} | PROGRAMMING | Codeforces Round #612 - Editorial | 2400 | |
| 776 | Madhouse (Hard version) | brute force constructive algorithms hashing interactive math | Statement | C2 | Codeforces Round 612 (Div. 1) {1286} | PROGRAMMING | Codeforces Round #612 - Editorial | 2900 | |
| 931 | LCC | data structures math matrices probabilities | Statement | D | Codeforces Round 612 (Div. 1) {1286} | PROGRAMMING | Codeforces Round #612 - Editorial | 2900 | |
| 541 | Harry The Potter | brute force constructive algorithms dp fft implementation math | Statement | F | Codeforces Round 612 (Div. 1) {1286} | PROGRAMMING | Codeforces Round #612 - Editorial | 3200 | |
| 19487 | Deadline | binary search brute force math ternary search | Statement | A | Educational Codeforces Round 80 (Rated for Div. 2) {1288} | PROGRAMMING | Educational Codeforces Round 80 Editorial | 1100 | |
| 17923 | Yet Another Meme Problem | math | Statement | B | Educational Codeforces Round 80 (Rated for Div. 2) {1288} | PROGRAMMING | Educational Codeforces Round 80 Editorial | 1100 | |
| 20943 | Even But Not Even | greedy math strings | Statement | A | Codeforces Round 616 (Div. 2) {1291} | PROGRAMMING | 500.0 | Codeforces Round #616 Editorial | 1000 |
| 1069 | 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 |
| 480 | Rin and The Unknown Flower | constructive algorithms greedy interactive math | Statement | E | Codeforces Round 614 (Div. 1) {1292} | PROGRAMMING | 2250.0 | Codeforces Round #614 Editorial | 3500 |
| 22481 | JOE is on TV! | combinatorics greedy math | Statement | B | Codeforces Round 614 (Div. 2) {1293} | PROGRAMMING | 750.0 | Codeforces Round #614 Editorial | 1000 |
| 49325 | Product of Three Numbers | greedy math number theory | Statement | C | Codeforces Round 615 (Div. 3) {1294} | PROGRAMMING | Codeforces Round #615 (Div. 3) Editorial | 1300 | |
| 12846 | MEX maximizing | data structures greedy implementation math | Statement | D | Codeforces Round 615 (Div. 3) {1294} | PROGRAMMING | Codeforces Round #615 (Div. 3) Editorial | 1600 | |
| 5278 | Obtain a Permutation | greedy implementation math | Statement | E | Codeforces Round 615 (Div. 3) {1294} | PROGRAMMING | Codeforces Round #615 (Div. 3) Editorial | 2000 | |
| 54784 | Collecting Coins | math | Statement | A | Codeforces Round 615 (Div. 3) {1294} | PROGRAMMING | Codeforces Round #615 (Div. 3) Editorial | 900 | |
| 10011 | Infinite Prefixes | math strings | Statement | B | Educational Codeforces Round 81 (Rated for Div. 2) {1295} | PROGRAMMING | Educational Codeforces Round 81 Editorial | 1700 | |
| 10608 | Same GCDs | math number theory | Statement | D | Educational Codeforces Round 81 (Rated for Div. 2) {1295} | PROGRAMMING | Educational Codeforces Round 81 Editorial | 1800 | |
| 33063 | Food Buying | math | Statement | B | Codeforces Round 617 (Div. 3) {1296} | PROGRAMMING | Codeforces Round #617 (Div. 3) Editorial | 1000 | |
| 49532 | Array with Odd Sum | math | Statement | A | Codeforces Round 617 (Div. 3) {1296} | PROGRAMMING | Codeforces Round #617 (Div. 3) Editorial | 800 | |
| 78 | M-numbers | *special dp math | Statement | G | Kotlin Heroes: Episode 3 {1297} | PROGRAMMING | Kotlin Heroes: Episode 3 Editorial | ||
| 12699 | Anu Has a Function | brute force greedy math | Statement | A | Codeforces Round 618 (Div. 1) {1299} | PROGRAMMING | 500.0 | Codeforces Round #618 Editorial | 1500 |
| 723 | 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 |
| 272 | So Mean | interactive math | Statement | E | Codeforces Round 618 (Div. 1) {1299} | PROGRAMMING | 2250.0 | Codeforces Round #618 Editorial | 3400 |
| 21791 | Non-zero | implementation math | Statement | A | Codeforces Round 618 (Div. 2) {1300} | PROGRAMMING | 500.0 | Codeforces Round #618 Editorial | 700 |
| 9984 | Ayoub's function | binary search combinatorics greedy math strings | Statement | C | Codeforces Round 619 (Div. 2) {1301} | PROGRAMMING | 1250.0 | Codeforces Round #619 (Div. 2) Editorial | 1700 |
| 17064 | National Project | math | Statement | B | Educational Codeforces Round 82 (Rated for Div. 2) {1303} | PROGRAMMING | Educational Codeforces Round 82 | 1300 | |
| 26934 | Two Rabbits | math | Statement | A | Codeforces Round 620 (Div. 2) {1304} | PROGRAMMING | 500.0 | Codeforces Round #620 (Div. 2) Editorial | 800 |
| 20021 | Kuroni and Impossible Calculation | brute force combinatorics math number theory | Statement | C | Ozon Tech Challenge 2020 (Div.1 + Div.2, Rated, T-shirts + prizes!) {1305} | PROGRAMMING | 1250.0 | Ozon Tech Challenge 2020 Editorial | 1600 |
| 3305 | Kuroni and the Score Distribution | constructive algorithms greedy implementation math | Statement | E | Ozon Tech Challenge 2020 (Div.1 + Div.2, Rated, T-shirts + prizes!) {1305} | PROGRAMMING | 2000.0 | Ozon Tech Challenge 2020 Editorial | 2100 |
| 3391 | Kuroni and the Punishment | math number theory probabilities | Statement | F | Ozon Tech Challenge 2020 (Div.1 + Div.2, Rated, T-shirts + prizes!) {1305} | PROGRAMMING | 2500.0 | Ozon Tech Challenge 2020 Editorial | 2500 |
| 13946 | Cow and Friend | geometry greedy math | Statement | B | Codeforces Round 621 (Div. 1 + Div. 2) {1307} | PROGRAMMING | 1000.0 | Codeforces Round #621 (Div. 1 + Div. 2) Editorial | 1300 |
| 12824 | 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 |
| 1475 | Cow and Treats | binary search combinatorics dp greedy implementation math | Statement | E | Codeforces Round 621 (Div. 1 + Div. 2) {1307} | PROGRAMMING | 2500.0 | Codeforces Round #621 (Div. 1 + Div. 2) Editorial | 2400 |
| 250 | Bad Cryptography | math number theory | Statement | F | VK Cup 2019-2020 - Elimination Round (Engine) {1310} | PROGRAMMING | 3500.0 | VK Cup 2019-2020 - Elimination Round (Engine) and Codeforces Round #623 | 3300 |
| 10083 | Three Integers | brute force math | Statement | D | Codeforces Round 624 (Div. 3) {1311} | PROGRAMMING | 74224 | 1900 | |
| 46836 | Add Odd or Subtract Even | greedy implementation math | Statement | A | Codeforces Round 624 (Div. 3) {1311} | PROGRAMMING | 74224 | 700 | |
| 18640 | Adding Powers | bitmasks greedy implementation math number theory ternary search | Statement | C | Educational Codeforces Round 83 (Rated for Div. 2) {1312} | PROGRAMMING | 74640 | ||
| 10851 | Count the Arrays | combinatorics math | Statement | D | Educational Codeforces Round 83 (Rated for Div. 2) {1312} | PROGRAMMING | 74640 | ||
| 27765 | Two Regular Polygons | geometry math number theory | Statement | A | Educational Codeforces Round 83 (Rated for Div. 2) {1312} | PROGRAMMING | 74640 | ||
| 7075 | Different Rules | binary search constructive algorithms greedy implementation math | Statement | B | Codeforces Round 622 (Div. 2) {1313} | PROGRAMMING | 1000.0 | Editorial | 1700 |
| 7630 | Primitive Primes | constructive algorithms math ternary search | Statement | C | CodeCraft-20 (Div. 2) {1316} | PROGRAMMING | 1500.0 | Codecraft-20 (Div.2) Editorial | 1700 |
| 23098 | Journey Planning | data structures math sortings | Statement | A | Codeforces Round 625 (Div. 1, based on Technocup 2020 Final Round) {1320} | PROGRAMMING | 500.0 | Codeforces Round #625 Editorial | |
| 4734 | Present | binary search bitmasks constructive algorithms data structures math sortings | Statement | B | Codeforces Round 626 (Div. 1, based on Moscow Open Olympiad in Informatics) {1322} | PROGRAMMING | 1000.0 | Codeforces Round #626 Editorial | |
| 2795 | Instant Noodles | graphs hashing math number theory | Statement | C | Codeforces Round 626 (Div. 1, based on Moscow Open Olympiad in Informatics) {1322} | PROGRAMMING | 1500.0 | Codeforces Round #626 Editorial | |
| 12958 | Unusual Competitions | greedy | Statement | A | Codeforces Round 626 (Div. 1, based on Moscow Open Olympiad in Informatics) {1322} | PROGRAMMING | 500.0 | Codeforces Round #626 Editorial | |
| 16585 | Permutation Partitions | combinatorics greedy math | Statement | C | Codeforces Global Round 7 {1326} | PROGRAMMING | 1000.0 | 74961 | 1300 |
| 740 | Wise Men (Hard Version) | bitmasks dp math | Statement | F2 | Codeforces Global Round 7 {1326} | PROGRAMMING | 1500.0 | 74961 | 3200 |
| 25484 | Maximums | implementation math | Statement | B | Codeforces Global Round 7 {1326} | PROGRAMMING | 1000.0 | 74961 | 900 |
| 47045 | Sum of Odd Integers | math | Statement | A | Educational Codeforces Round 84 (Rated for Div. 2) {1327} | PROGRAMMING | Educational Codeforces Round 84 Editorial | 1100 | |
| 9821 | Count The Blocks | combinatorics dp math | Statement | E | Educational Codeforces Round 84 (Rated for Div. 2) {1327} | PROGRAMMING | Educational Codeforces Round 84 Editorial | 1800 | |
| 3603 | Infinite Path | brute force dfs and similar graphs math number theory | Statement | D | Educational Codeforces Round 84 (Rated for Div. 2) {1327} | PROGRAMMING | Educational Codeforces Round 84 Editorial | 2200 | |
| 32631 | K-th Beautiful String | combinatorics implementation math | Statement | B | Codeforces Round 629 (Div. 3) {1328} | PROGRAMMING | 75246 | 1300 | |
| 14750 | Carousel | greedy math | Statement | D | Codeforces Round 629 (Div. 3) {1328} | PROGRAMMING | 75246 | 1800 | |
| 137655 | Divisibility Problem | math | Statement | A | Codeforces Round 629 (Div. 3) {1328} | PROGRAMMING | 75246 | 800 | |
| 9814 | Dreamoon Likes Coloring | constructive algorithms greedy implementation math | Statement | A | Codeforces Round 631 (Div. 1) - Thanks, Denis aramis Shitov! {1329} | PROGRAMMING | 500.0 | Codeforces Round #631 Editorial | 1800 |
| 7199 | Dreamoon Likes Sequences | bitmasks combinatorics dp math | Statement | B | Codeforces Round 631 (Div. 1) - Thanks, Denis aramis Shitov! {1329} | PROGRAMMING | 750.0 | Codeforces Round #631 Editorial | 1900 |
| 14661 | Dreamoon Likes Permutations | implementation math | Statement | B | Codeforces Round 631 (Div. 2) - Thanks, Denis aramis Shitov! {1330} | PROGRAMMING | 1000.0 | Codeforces Round #631 Editorial | 1400 |
| 7173 | Limericks | math number theory | Statement | B | April Fools Day Contest 2020 {1331} | PROGRAMMING | April Fools Day Contest 2020: editorial | ||
| 19921 | Exercising Walk | greedy implementation math | Statement | A | Codeforces Round 630 (Div. 2) {1332} | PROGRAMMING | 500.0 | Codeforces Round #630 Editorial | 1200 |
| 19375 | Composite Coloring | brute force constructive algorithms greedy math number theory | Statement | B | Codeforces Round 630 (Div. 2) {1332} | PROGRAMMING | 1000.0 | Codeforces Round #630 Editorial | 1500 |
| 8519 | Walk on Matrix | bitmasks constructive algorithms math | Statement | D | Codeforces Round 630 (Div. 2) {1332} | PROGRAMMING | 1250.0 | Codeforces Round #630 Editorial | 1700 |
| 4415 | Height All the Same | combinatorics constructive algorithms math matrices | Statement | E | Codeforces Round 630 (Div. 2) {1332} | PROGRAMMING | 1750.0 | Codeforces Round #630 Editorial | 2100 |
| 424 | No Monotone Triples | data structures | Statement | G | Codeforces Round 630 (Div. 2) {1332} | PROGRAMMING | 3000.0 | Codeforces Round #630 Editorial | 3000 |
| 4187 | Challenges in school №41 | brute force constructive algorithms games graphs greedy implementation sortings | Statement | D | Codeforces Round 632 (Div. 2) {1333} | PROGRAMMING | 1750.0 | Codeforces Round #632 (Div. 2) editorial | |
| 4658 | Kate and imperfection | greedy implementation math number theory sortings two pointers | Statement | F | Codeforces Round 632 (Div. 2) {1333} | PROGRAMMING | 2500.0 | Codeforces Round #632 (Div. 2) editorial | |
| 18252 | Circle of Monsters | brute force constructive algorithms greedy math | Statement | C | Educational Codeforces Round 85 (Rated for Div. 2) {1334} | PROGRAMMING | Educational Codeforces Round 85 Editorial | ||
| 3238 | Divisor Paths | combinatorics graphs greedy math number theory | Statement | E | Educational Codeforces Round 85 (Rated for Div. 2) {1334} | PROGRAMMING | Educational Codeforces Round 85 Editorial |