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< 1 2 3 4 >Solved |
Name |
Tags |
Solutions |
Index |
Contest |
Type |
Points |
Tutorial |
Rating Level |
|---|---|---|---|---|---|---|---|---|---|
| 1069 | Beautiful Matrix | combinatorics data structures dp | Statement | G | Технокубок 2019 - Отборочный Раунд 4 {1085} | PROGRAMMING | Technocup 2019 — Elimination Round 4 + Codeforces Round 528: editorial | 2600 | |
| 7572 | New Year and the Permutation Concatenation | combinatorics dp math | Statement | D | Good Bye 2018 {1091} | PROGRAMMING | Editorial | 1700 | |
| 11932 | Substring Removal | combinatorics math strings | Statement | B | Educational Codeforces Round 57 (рейтинговый для Див. 2) {1096} | PROGRAMMING | Разбор Educational Codeforces Round 57 | 1400 | |
| 1374 | The Top Scorer | combinatorics dp math probabilities | Statement | E | Educational Codeforces Round 57 (рейтинговый для Див. 2) {1096} | PROGRAMMING | Разбор Educational Codeforces Round 57 | 2600 | |
| 1554 | Alex and a TV Show | bitmasks combinatorics number theory | Statement | F | Hello 2019 {1097} | PROGRAMMING | 64310 | 2400 | |
| 1198 | Vladislav and a Great Legend | combinatorics dp trees | Statement | G | Hello 2019 {1097} | PROGRAMMING | 64310 | 2900 | |
| 7141 | Monotonic Renumeration | combinatorics sortings | Statement | E | Codeforces Round 531 (Div. 3) {1102} | PROGRAMMING | 64439 | 1800 | |
| 11799 | Ayoub and Lost Array | combinatorics dp math | Statement | C | Codeforces Round 533 (Div. 2) {1105} | PROGRAMMING | Tutorial | 1500 | |
| 1555 | 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 | |
| 1192 | Destroy the Colony | combinatorics dp math | Statement | D | CodeCraft-19 and Codeforces Round 537 (Div. 2) {1111} | PROGRAMMING | CodeCraft-19 and Codeforces Round #537 (Div. 2) Editorial | 2500 | |
| 712 | Tree Cutting (Hard Version) | combinatorics dfs and similar dp trees | Statement | F2 | Codeforces Round 540 (Div. 3) {1118} | PROGRAMMING | 65396 | 2700 | |
| 2156 | Palindrome-less Arrays | combinatorics divide and conquer dp | Statement | E | Educational Codeforces Round 62 (рейтинговый для Див. 2) {1140} | PROGRAMMING | Educational Codeforces Round 62 Editorial | 2200 | |
| 3876 | Number of Components | combinatorics data structures dp math | Statement | E | Codeforces Round 553 (Div. 2) {1151} | PROGRAMMING | Codeforces Round #553 (Div. 2) Editorial | 2100 | |
| 1533 | Sonya and Informatics | combinatorics dp matrices probabilities | Statement | F | Codeforces Round 553 (Div. 2) {1151} | PROGRAMMING | Codeforces Round #553 (Div. 2) Editorial | 2500 | |
| 1019 | Serval and Bonus Problem | combinatorics dp math probabilities | Statement | F | Codeforces Round 551 (Div. 2) {1153} | PROGRAMMING | Editorial | 2800 | |
| 15208 | Silent Classroom | combinatorics greedy | Statement | A | Codeforces Round 561 (Div. 2) {1166} | PROGRAMMING | Codeforces Round #561 (Div. 2) Editorial | 900 | |
| 3001 | Range Deleting | binary search combinatorics data structures two pointers | Statement | E | Educational Codeforces Round 65 (рейтинговый для Див. 2) {1167} | PROGRAMMING | 67058 | 2100 | |
| 1937 | Scalar Queries | combinatorics data structures math sortings | Statement | F | Educational Codeforces Round 65 (рейтинговый для Див. 2) {1167} | PROGRAMMING | 67058 | 2300 | |
| 4468 | Nauuo and Circle | combinatorics dfs and similar dp trees | Statement | B | Codeforces Round 564 (Div. 1) {1172} | PROGRAMMING | Codeforces Round #564 Editorial | 2000 | |
| 1854 | 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 | |
| 13549 | Tiles | combinatorics greedy math | Statement | C | Codeforces Global Round 4 {1178} | PROGRAMMING | E | 1300 | |
| 2355 | Short Colorful Strip | combinatorics dfs and similar dp | Statement | F1 | Codeforces Global Round 4 {1178} | PROGRAMMING | E | 2200 | |
| 3418 | Flag | brute force combinatorics dp implementation | Statement | C | Codeforces Round 567 (Div. 2) {1181} | PROGRAMMING | Editorial of Codeforces Round #567 (based on All-Russian olympiad in the name of Keldysh) | 1900 | |
| 3276 | Playlist for Polycarp (easy version) | bitmasks combinatorics dp | Statement | G1 | Codeforces Round 568 (Div. 2) {1185} | PROGRAMMING | Editorial for Codeforces Round #568 (Div. 2) | 2100 | |
| 989 | Playlist for Polycarp (hard version) | combinatorics dp | Statement | G2 | Codeforces Round 568 (Div. 2) {1185} | PROGRAMMING | Editorial for Codeforces Round #568 (Div. 2) | 2800 | |
| 319 | Problem from Red Panda | combinatorics | Statement | E | Codeforces Round 572 (Div. 1) {1188} | PROGRAMMING | Editorial of Codeforces Round #572 | 3200 | |
| 1257 | Crossword Expert | combinatorics dp number theory probabilities two pointers | Statement | F | Educational Codeforces Round 68 (рейтинговый для Див. 2) {1194} | PROGRAMMING | Разбор Educational Codeforces Round 68 | 2500 | |
| 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 | |
| 4929 | 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 | |
| 1914 | Culture Code | binary search combinatorics data structures dp shortest paths sortings | Statement | E | Educational Codeforces Round 69 (рейтинговый для Див. 2) {1197} | PROGRAMMING | E | 2300 | |
| 5564 | Print a 1337-string... | combinatorics constructive algorithms math strings | Statement | D | Educational Codeforces Round 70 (рейтинговый для Див. 2) {1202} | PROGRAMMING | 68972 | 1900 | |
| 2303 | Natasha, Sasha and the Prefix Sums | combinatorics dp math number theory | Statement | E | Codeforces Round 581 (Div. 2) {1204} | PROGRAMMING | 69244 | 2400 | |
| 543 | Expected Value Again | combinatorics strings | Statement | E | Codeforces Round 580 (Div. 1) {1205} | PROGRAMMING | 69158 | 3100 | |
| 6793 | Number Of Permutations | combinatorics | Statement | D | Educational Codeforces Round 71 (рейтинговый для Див. 2) {1207} | PROGRAMMING | Educational Codeforces Round 71 Editorial | 1800 | |
| 19758 | The Number of Products | combinatorics dp implementation | Statement | B | Codeforces Round 585 (Div. 2) {1215} | PROGRAMMING | Codeforces Round #585 Editorial | 1500 | |
| 1052 | Graph And Numbers | bitmasks brute force combinatorics dp meet-in-the-middle | Statement | G | Educational Codeforces Round 73 (рейтинговый для Див. 2) {1221} | PROGRAMMING | Разбор Educational Codeforces Round 73 | 2900 | |
| 1989 | Wrong Answer on test 233 (Hard Version) | combinatorics math | Statement | F2 | Технокубок 2020 - Отборочный Раунд 3 {1227} | PROGRAMMING | Разбор задач №2 | 2400 | |
| 3714 | Another Filling the Grid | combinatorics dp math | Statement | E | Codeforces Round 589 (Div. 2) {1228} | PROGRAMMING | 70162 | 2300 | |
| 12230 | Alice and the List of Presents | combinatorics math | Statement | B | Codeforces Round 593 (Div. 2) {1236} | PROGRAMMING | 70654 | 1400 | |
| 1192 | Balanced Domino Placements | combinatorics dp | Statement | F | Codeforces Global Round 5 {1237} | PROGRAMMING | T | 2600 | |
| 6548 | AB-string | binary search combinatorics dp strings | Statement | D | Educational Codeforces Round 74 (рейтинговый для Див. 2) {1238} | PROGRAMMING | Educational Codeforces Round 74 Editorial | 1800 | |
| 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 | |
| 2388 | Daniel and Spring Cleaning | bitmasks brute force combinatorics dp | Statement | F | Codeforces Round 597 (Div. 2) {1245} | PROGRAMMING | Codeforces Round #597 (Div. 2) Editorial | 2300 | |
| 1097 | Red-White Fence | combinatorics fft | Statement | F | Educational Codeforces Round 75 (рейтинговый для Див. 2) {1251} | PROGRAMMING | 70860 | 2600 | |
| 483 | Send Tree to Charlie | combinatorics dfs and similar dsu trees | Statement | E | Codeforces Round 601 (Div. 1) {1254} | PROGRAMMING | Codeforces Round #601 Editorial | 3200 | |
| 1630 | Beautiful Bracket Sequence (easy version) | combinatorics dp probabilities | Statement | D1 | Codeforces Round 604 (Div. 1) {1264} | PROGRAMMING | 71995 | 2600 | |
| 1583 | Beautiful Bracket Sequence (hard version) | combinatorics probabilities | Statement | D2 | Codeforces Round 604 (Div. 1) {1264} | PROGRAMMING | 71995 | 3000 | |
| 2187 | Key Storage | combinatorics math | Statement | K | 2019-2020 ICPC, NERC, Northern Eurasia Finals (нерейтинговый, онлайн-трансляция, правила ICPC, предпочтительно команды) {1267} | PROGRAMMING | nerc-2019-tutorial.pdf | 2200 | |
| 3839 | Common Number | binary search combinatorics dp math | Statement | E | Codeforces Round 608 (Div. 2) {1271} | PROGRAMMING | 72247 | 2100 | |
| 31581 | Yet Another Broken Keyboard | combinatorics dp implementation | Statement | C | Codeforces Round 605 (Div. 3) {1272} | PROGRAMMING | Codeforces Round #605 (Div. 3) Editorial | 1100 | |
| 5765 | Two Fairs | combinatorics dfs and similar dsu graphs | Statement | B | Codeforces Round 606 (Div. 1, основан на Отборочном раунде 4 Технокубка 2020) {1276} | PROGRAMMING | Technocup 2020 — Elimination Round 4 + Codeforces Round 606: Editorial | 1900 | |
| 1804 | Beautiful Rectangle | brute force combinatorics constructive algorithms data structures greedy math | Statement | C | Codeforces Round 606 (Div. 1, основан на Отборочном раунде 4 Технокубка 2020) {1276} | PROGRAMMING | Technocup 2020 — Elimination Round 4 + Codeforces Round 606: Editorial | 2300 | |
| 2897 | Cards | combinatorics dp math number theory probabilities | Statement | F | Educational Codeforces Round 78 (рейтинговый для Див. 2) {1278} | PROGRAMMING | Educational Codeforces Round 78 Editorial | 2600 | |
| 7580 | Santa's Bot | combinatorics math probabilities | Statement | D | Educational Codeforces Round 79 (рейтинговый для Див. 2) {1279} | PROGRAMMING | Educational Codeforces Round 79 Editorial | 1700 | |
| 487 | New Year Permutations | combinatorics dp | Statement | E | Educational Codeforces Round 79 (рейтинговый для Див. 2) {1279} | PROGRAMMING | Educational Codeforces Round 79 Editorial | 2700 | |
| 115 | Intergalactic Sliding Puzzle | combinatorics constructive algorithms math | Statement | F | Codeforces Round 607 (Div. 1) {1280} | PROGRAMMING | Codeforces Round #607 Editorial | 3400 | |
| 11604 | New Year and Ascent Sequence | binary search combinatorics data structures dp implementation sortings | Statement | B | Hello 2020 {1284} | PROGRAMMING | Hello 2020 Editorial | 1500 | |
| 9007 | 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 | |
| 1406 | Classical? | binary search combinatorics number theory | Statement | F | Codeforces Round 613 (Div. 2) {1285} | PROGRAMMING | Codeforces Round #613 (Div. 2) Editorial | 2800 | |
| 15940 | Two Arrays | combinatorics dp | Statement | C | Educational Codeforces Round 80 (рейтинговый для Див. 2) {1288} | PROGRAMMING | Educational Codeforces Round 80 Editorial | 1600 | |
| 2415 | Xenon's Attack on the Gangs | combinatorics dfs and similar dp greedy trees | Statement | C | Codeforces Round 614 (Div. 1) {1292} | PROGRAMMING | 1250.0 | Codeforces Round #614 Editorial | 2300 |
| 448 | Nora's Toy Boxes | bitmasks combinatorics dp | Statement | F | Codeforces Round 614 (Div. 1) {1292} | PROGRAMMING | 2750.0 | Codeforces Round #614 Editorial | 3400 |
| 22483 | JOE is on TV! | combinatorics greedy math | Statement | B | Codeforces Round 614 (Div. 2) {1293} | PROGRAMMING | 750.0 | Codeforces Round #614 Editorial | 1000 |
| 1585 | Good Contest | combinatorics dp probabilities | Statement | F | Educational Codeforces Round 81 (рейтинговый для Див. 2) {1295} | PROGRAMMING | Educational Codeforces Round 81 Editorial | 2600 | |
| 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 |
| 9985 | 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 |
| 20028 | 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 |
| 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 |
| 10852 | Count the Arrays | combinatorics math | Statement | D | Educational Codeforces Round 83 (рейтинговый для Див. 2) {1312} | PROGRAMMING | 74640 | ||
| 16585 | Permutation Partitions | combinatorics greedy math | Statement | C | Codeforces Global Round 7 {1326} | PROGRAMMING | 1000.0 | 74961 | 1300 |
| 9822 | Count The Blocks | combinatorics dp math | Statement | E | Educational Codeforces Round 84 (рейтинговый для Див. 2) {1327} | PROGRAMMING | Educational Codeforces Round 84 Editorial | 1800 | |
| 2162 | AND Segments | bitmasks combinatorics data structures dp two pointers | Statement | F | Educational Codeforces Round 84 (рейтинговый для Див. 2) {1327} | PROGRAMMING | Educational Codeforces Round 84 Editorial | 2500 | |
| 32639 | K-th Beautiful String | combinatorics implementation math | Statement | B | Codeforces Round 629 (Div. 3) {1328} | PROGRAMMING | 75246 | 1300 | |
| 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 |
| 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 |
| 3238 | Divisor Paths | combinatorics graphs greedy math number theory | Statement | E | Educational Codeforces Round 85 (рейтинговый для Див. 2) {1334} | PROGRAMMING | Educational Codeforces Round 85 Editorial | ||
| 916 | Chiori and Doll Picking (easy version) | bitmasks brute force combinatorics math | Statement | E1 | Codeforces Round 635 (Div. 1) {1336} | PROGRAMMING | 1750.0 | Codeforces Round #635 Editorial | 2600 |
| 725 | Chiori and Doll Picking (hard version) | bitmasks brute force combinatorics math | Statement | E2 | Codeforces Round 635 (Div. 1) {1336} | PROGRAMMING | 1500.0 | Codeforces Round #635 Editorial | 3400 |
| 3758 | Placing Rooks | combinatorics fft math | Statement | E | Educational Codeforces Round 86 (рейтинговый для Див. 2) {1342} | PROGRAMMING | 76633 | 2300 | |
| 6899 | Modular Stability | combinatorics math number theory | Statement | E | Educational Codeforces Round 88 (рейтинговый для Див. 2) {1359} | PROGRAMMING | Educational Codeforces Round 88 Editorial | 2000 | |
| 1565 | Secure Password | bitmasks combinatorics constructive algorithms interactive math | Statement | G | Codeforces Round 648 (Div. 2) {1365} | PROGRAMMING | 3000.0 | Editorial — Codeforces Round #648 | 2800 |
| 4689 | Two Arrays | binary search brute force combinatorics dp greedy implementation two pointers | Statement | E | Educational Codeforces Round 89 (рейтинговый для Див. 2) {1366} | PROGRAMMING | Educational Codeforces Round 89 Editorial | ||
| 5560 | Asterism (Easy Version) | brute force combinatorics implementation math number theory sortings | Statement | E1 | Codeforces Round 654 (Div. 2) {1371} | PROGRAMMING | 1500.0 | Codeforces Round #654 (Div. 2) Editorial | |
| 9723 | Unmerge | combinatorics dp two pointers | Statement | B | Codeforces Round 658 (Div. 1) {1381} | PROGRAMMING | 1500.0 | Codeforces Round #658 Editorial | 1800 |
| 16209 | Cyclic Permutations | combinatorics graphs math | Statement | C | Codeforces Round 663 (Div. 2) {1391} | PROGRAMMING | 1250.0 | Codeforces Round #663 (Div. 2) Editorial | |
| 1222 | ZS Shuffles Cards | combinatorics math probabilities | Statement | H | Codeforces Global Round 10 {1392} | PROGRAMMING | 3500.0 | Codeforces Global Round 10 — Editorial | |
| 1229 | Mercenaries | bitmasks combinatorics data structures math two pointers | Statement | G | Educational Codeforces Round 94 (рейтинговый для Див. 2) {1400} | PROGRAMMING | 81942 | ||
| 271 | Star Trek | *special combinatorics dfs and similar dp games graphs matrices trees | Statement | C | Central-European Olympiad in Informatics, CEOI 2020, Day 1 (IOI, Unofficial Mirror Contest, Unrated) {1402} | PROGRAMMING | Editorial | ||
| 95 | Chess Rush | *special combinatorics dp implementation math | Statement | C | Central-European Olympiad in Informatics, CEOI 2020, Day 2 (IOI, Unofficial Mirror Contest, Unrated) {1403} | PROGRAMMING | CEOI 2020 Online Mirror — Day 2 Tutorial | ||
| 1396 | Clusterization Counting | combinatorics dp dsu fft graphs | Statement | G | Grakn Forces 2020 {1408} | PROGRAMMING | 3000.0 | Grakn Forces -- Editorial | |
| 2398 | Expected Damage | binary search combinatorics math probabilities | Statement | E | Educational Codeforces Round 95 (рейтинговый для Див. 2) {1418} | PROGRAMMING | Unofficial Editorial for Educational Round 95 (Div. 2) | ||
| 8494 | Rescue Nibel! | combinatorics data structures sortings | Statement | D | Codeforces Round 672 (Div. 2) {1420} | PROGRAMMING | 2000.0 | Editorial | |
| 931 | Danger of Mad Snakes | combinatorics dp math | Statement | D | 2020 ICPC, COMPFEST 12, Indonesia Multi-Provincial Contest (Unrated, Online Mirror, ICPC Rules, Teams Preferred) {1425} | PROGRAMMING | Tutorial | 2300 | |
| 6437 | Number of Subsequences | combinatorics dp strings | Statement | F | Codeforces Round 674 (Div. 3) {1426} | PROGRAMMING | 83120 | 2000 | |
| 20136 | Two Round Dances | combinatorics math | Statement | E | Codeforces Round 677 (Div. 3) {1433} | PROGRAMMING | Codeforces Round #677 (Div. 3) Editorial | ||
| 11897 | Binary Search | binary search combinatorics | Statement | C | Codeforces Round 678 (Div. 2) {1436} | PROGRAMMING | 1500.0 | Codeforces Round #678 (Div. 2). Editorial | |
| 727 | Sum Over Subsets | combinatorics math number theory | Statement | F | Codeforces Round 678 (Div. 2) {1436} | PROGRAMMING | 3000.0 | Codeforces Round #678 (Div. 2). Editorial | |
| 1717 | Emotional Fishermen | combinatorics dp math | Statement | F | Educational Codeforces Round 97 (рейтинговый для Див. 2) {1437} | PROGRAMMING | 84149 | ||
| 616 | INOI Final Contests | combinatorics dp | Statement | D | Codeforces Round 684 (Div. 1) {1439} | PROGRAMMING | 2500.0 | Codeforces Round #684[Div1 and Div2] Editorial | |
| 5470 | Identify the Operations | brute force combinatorics data structures dsu greedy implementation | Statement | B | Codeforces Round 681 (Div. 1, по задачам VK Cup 2019-2020 - Финал) {1442} | PROGRAMMING | 1000.0 | 84298 | |
| 1590 | Long Permutation | brute force combinatorics math | Statement | E | Codeforces Round 681 (Div. 2, по задачам VK Cup 2019-2020 - Финал) {1443} | PROGRAMMING | 2500.0 | VK Cup 2019-2020 -- Engine Editorial | |
| 6850 | Divide and Sum | combinatorics math | Statement | B | Codeforces Round 680 (Div. 1, по задачам МКОШП) {1444} | PROGRAMMING | 1000.0 | Codeforces Round #680 Editorial | |
| 659 | Multithreading (Easy Version) | combinatorics fft math | Statement | H1 | Codeforces Global Round 12 {1450} | PROGRAMMING | 2750.0 | Codeforces Global Round 12 Editorial | |
| 387 | Multithreading (Hard Version) | combinatorics implementation math | Statement | H2 | Codeforces Global Round 12 {1450} | PROGRAMMING | 1750.0 | Codeforces Global Round 12 Editorial | |
| 8804 | Radio Towers | combinatorics dp math | Statement | D | Educational Codeforces Round 98 (рейтинговый для Див. 2) {1452} | PROGRAMMING | 84847 | ||
| 7016 | Number of Simple Paths | combinatorics data structures dfs and similar dsu graphs trees | Statement | E | Codeforces Round 686 (Div. 3) {1454} | PROGRAMMING | Codeforces Round #686 (Div. 3) Editorial | ||
| 11770 | Close Tuples (hard version) | binary search combinatorics implementation math sortings two pointers | Statement | E2 | Codeforces Round 690 (Div. 3) {1462} | PROGRAMMING | Codeforces Round #690 (Div. 3) Editorial | ||
| 15658 | Close Tuples (easy version) | binary search combinatorics math sortings two pointers | Statement | E1 | Codeforces Round 690 (Div. 3) {1462} | PROGRAMMING | Codeforces Round #690 (Div. 3) Editorial | ||
| 4101 | Sum of Paths | combinatorics dp math | Statement | D | Codeforces Round 695 (Div. 2) {1467} | PROGRAMMING | 1750.0 | Codeforces Round #695 (Div. 2) Editorial | 2200 |
| 996 | Strange Permutation | binary search combinatorics data structures dp two pointers | Statement | E | Codeforces Round 694 (Div. 1) {1470} | PROGRAMMING | 2000.0 | 86464 | |
| 511 | Tiles | combinatorics dp fft math | Statement | G | Educational Codeforces Round 102 (рейтинговый для Див. 2) {1473} | PROGRAMMING | Educational Codeforces Round 102 Editorial | ||
| 28699 | Ball in Berland | combinatorics dfs and similar graphs hashing math | Statement | C | Codeforces Round 697 (Div. 3) {1475} | PROGRAMMING | Codeforces Round #697 (Div. 3) Editorial | ||
| 18732 | Advertising Agency | combinatorics implementation math sortings | Statement | E | Codeforces Round 697 (Div. 3) {1475} | PROGRAMMING | Codeforces Round #697 (Div. 3) Editorial | ||
| 386 | Nezzar and Chocolate Bars | combinatorics fft math probabilities | Statement | F | Codeforces Round 698 (Div. 1) {1477} | PROGRAMMING | 4000.0 | 87294 | 3500 |
| 2408 | Copy or Prefix Sum | combinatorics data structures dp sortings | Statement | F | Codeforces Round 701 (Div. 2) {1485} | PROGRAMMING | 3000.0 | Editorial of Codeforces Round #701 (Div. 2) | 2400 |
| 884 | Pairs of Paths | combinatorics data structures trees | Statement | F | Codeforces Round 703 (Div. 2) {1486} | PROGRAMMING | 3000.0 | Codeforces Round #703 (Div. 2) Editorial | |
| 757 | String Counting | combinatorics dp math | Statement | G | Educational Codeforces Round 104 (рейтинговый для Див. 2) {1487} | PROGRAMMING | 87873 | ||
| 74 | Build From Suffixes | *special combinatorics data structures | Statement | H | Kotlin Heroes: Episode 6 {1488} | PROGRAMMING | 88522 | ||
| 1599 | BFS Trees | combinatorics dfs and similar graphs math shortest paths trees | Statement | D | Codeforces Round 706 (Div. 1) {1495} | PROGRAMMING | 2000.0 | Codeforces Round #706 Editorial | |
| 12687 | Planar Reflections | brute force combinatorics data structures dp | Statement | C | CodeCraft-21 and Codeforces Round 711 (Div. 2) {1498} | PROGRAMMING | 1750.0 | CodeCraft-21 and Codeforces Round #711 (Div. 2) Editorial | |
| 2191 | Two Houses | brute force combinatorics graphs interactive probabilities sortings | Statement | E | CodeCraft-21 and Codeforces Round 711 (Div. 2) {1498} | PROGRAMMING | 2500.0 | CodeCraft-21 and Codeforces Round #711 (Div. 2) Editorial | |
| 1705 | Chaotic Merge | combinatorics dp | Statement | E | Educational Codeforces Round 106 (рейтинговый для Див. 2) {1499} | PROGRAMMING | Educational Codeforces Round 106 Editorial | ||
| 937 | 2-Coloring | combinatorics dp math | Statement | E | Codeforces Round 712 (Div. 1) {1503} | PROGRAMMING | 2500.0 | T | 3100 |
| 4511 | Almost Sorted | binary search bitmasks combinatorics constructive algorithms dp implementation math | Statement | B | Codeforces Round 715 (Div. 1) {1508} | PROGRAMMING | 1000.0 | Codeforces Round #715 Editorial | |
| 2956 | Colorings and Dominoes | combinatorics dp math | Statement | E | Educational Codeforces Round 107 (рейтинговый для Див. 2) {1511} | PROGRAMMING | 89634 | ||
| 21328 | AND Sequences | bitmasks combinatorics constructive algorithms | Statement | B | Divide by Zero 2021 and Codeforces Round 714 (Div. 2) {1513} | PROGRAMMING | 1250.0 | Divide by Zero 2021 and Codeforces Round #714 (Div. 2) Editorial | |
| 1772 | Cost Equilibrium | combinatorics constructive algorithms math sortings | Statement | E | Divide by Zero 2021 and Codeforces Round 714 (Div. 2) {1513} | PROGRAMMING | 2750.0 | Divide by Zero 2021 and Codeforces Round #714 (Div. 2) Editorial | |
| 37305 | AND 0, Sum Big | bitmasks combinatorics math | Statement | B | Codeforces Round 716 (Div. 2) {1514} | PROGRAMMING | 1000.0 | Codeforces round #716 editorial | |
| 4717 | Phoenix and Computers | combinatorics dp math | Statement | E | Codeforces Global Round 14 {1515} | PROGRAMMING | 2750.0 | Editorial | |
| 1094 | Baby Ehab Plays with Permutations | combinatorics dp math | Statement | E | Codeforces Round 717 (Div. 2) {1516} | PROGRAMMING | 2750.0 | Codeforces round #717 editorial | |
| 1069 | Group Photo | binary search combinatorics implementation two pointers | Statement | E | Contest 2050 and Codeforces Round 718 (Div. 1 + Div. 2) {1517} | PROGRAMMING | 2500.0 | Contest 2050 and Codeforces Round #718 (Div.1 + Div.2) Editorial | |
| 2034 | Crypto Lights | combinatorics dp probabilities | Statement | E | Deltix Round, Spring 2021 (open for everyone, rated, Div. 1 + Div. 2) {1523} | PROGRAMMING | 2250.0 | Deltix Round, Spring 2021. Editorial | 2600 |
| 2566 | Assimilation IV | combinatorics dp math probabilities | Statement | E | Educational Codeforces Round 109 (рейтинговый для Див. 2) {1525} | PROGRAMMING | 90793 | ||
| 1588 | Oolimry and Suffix Array | combinatorics constructive algorithms math string suffix structures | Statement | E | Codeforces Round 723 (Div. 2) {1526} | PROGRAMMING | 2500.0 | Codeforces Round #723 (Div. 2) Editorial | |
| 2352 | MEX Tree | combinatorics constructive algorithms data structures dfs and similar math trees | Statement | D | Codeforces Round 721 (Div. 2) {1527} | PROGRAMMING | 2250.0 | Tutorial | 2400 |
| 648 | Mashtali and Hagh Trees | combinatorics dp trees | Statement | E | Codeforces Round 722 (Div. 1) {1528} | PROGRAMMING | 2750.0 | Codeforces Round #722 Editorial | |
| 558 | AmShZ Farm | combinatorics fft math | Statement | F | Codeforces Round 722 (Div. 1) {1528} | PROGRAMMING | 3000.0 | Codeforces Round #722 Editorial | |
| 14064 | Little Alawn's Puzzle | combinatorics dfs and similar dp dsu graphs math | Statement | C | Codeforces LATOKEN Round 1 (Div. 1 + Div. 2) {1534} | PROGRAMMING | 1250.0 | Codeforces LATOKEN Round 1 (Div. 1 + Div. 2) Editorial | |
| 2773 | Omkar and Forest | combinatorics graphs math shortest paths | Statement | E | Codeforces Round 724 (Div. 2) {1536} | PROGRAMMING | 2250.0 | Codeforces Round #724 — Editorial | 2300 |
| 1220 | Omkar and Akmar | combinatorics games math | Statement | F | Codeforces Round 724 (Div. 2) {1536} | PROGRAMMING | 2500.0 | Codeforces Round #724 — Editorial | 2600 |
| 21839 | Contest Start | combinatorics geometry math | Statement | A | Codeforces Round 727 (Div. 2) {1539} | PROGRAMMING | 500.0 | tutorial | 1000 |
| 3095 | Tree Array | brute force combinatorics dp math probabilities trees | Statement | B | Codeforces Round 728 (Div. 1) {1540} | PROGRAMMING | 1250.0 | Tutorial | |
| 1500 | Abnormal Permutation Pairs (easy version) | combinatorics dp fft math | Statement | E1 | Codeforces Round 729 (Div. 2) {1542} | PROGRAMMING | 2000.0 | ||
| 3040 | Priority Queue | combinatorics dp implementation math | Statement | D | Codeforces Round 729 (Div. 2) {1542} | PROGRAMMING | 2000.0 | ||
| 1092 | Abnormal Permutation Pairs (hard version) | combinatorics dp math | Statement | E2 | Codeforces Round 729 (Div. 2) {1542} | PROGRAMMING | 1000.0 | ||
| 24724 | Customising the Track | combinatorics greedy math | Statement | B | Codeforces Round 730 (Div. 2) {1543} | PROGRAMMING | 750.0 | Codeforces Round #730 (Div. 2) Editorial | |
| 7163 | AquaMoon and Chess | combinatorics math | Statement | B | Codeforces Round 732 (Div. 1) {1545} | PROGRAMMING | 1000.0 | Codeforces Round #732 Editorial | 1900 |
| 840 | AquaMoon and Permutations | combinatorics constructive algorithms graph matchings graphs | Statement | C | Codeforces Round 732 (Div. 1) {1545} | PROGRAMMING | 1500.0 | Codeforces Round #732 Editorial | 2800 |
| 2276 | The Three Little Pigs | combinatorics dp fft math | Statement | C | Codeforces Round 736 (Div. 1) {1548} | PROGRAMMING | 1750.0 | Codeforces Round 736 Editorial | |
| 2110 | Excellent Arrays | brute force combinatorics constructive algorithms implementation math | Statement | D | Educational Codeforces Round 111 (рейтинговый для Див. 2) {1550} | PROGRAMMING | Educational Codeforces Round 111 Editorial | ||
| 2247 | Equidistant Vertices | combinatorics dfs and similar dp trees | Statement | F | Codeforces Round 734 (Div. 3) {1551} | PROGRAMMING | Editorial for Codeforces Round #734 (Div.3) | ||
| 6343 | Maximize the Intersections | combinatorics constructive algorithms geometry greedy | Statement | C | Codeforces Global Round 15 {1552} | PROGRAMMING | 1000.0 | Editorial of Global Round 15 | |
| 17167 | Running for Gold | combinatorics graphs greedy probabilities sortings | Statement | B | Codeforces Global Round 15 {1552} | PROGRAMMING | 500.0 | Editorial of Global Round 15 | |
| 3861 | Permutation Shift | brute force combinatorics constructive algorithms dfs and similar graphs math | Statement | E | Harbour.Space Scholarship Contest 2021-2022 (open for everyone, rated, Div. 1 + Div. 2) {1553} | PROGRAMMING | 1750.0 | Harbour.Space Scholarship Contest 2021-2022 (Div. 1 + Div. 2) Editorial | |
| 389 | Stairs | combinatorics divide and conquer fft math | Statement | I | Harbour.Space Scholarship Contest 2021-2022 (open for everyone, rated, Div. 1 + Div. 2) {1553} | PROGRAMMING | 5250.0 | Harbour.Space Scholarship Contest 2021-2022 (Div. 1 + Div. 2) Editorial | |
| 1480 | 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 |
| 11031 | Moamen and XOR | bitmasks combinatorics dp math | Statement | C | Codeforces Round 737 (Div. 2) {1557} | PROGRAMMING | 1750.0 | Codeforces Round #737 Editorial | |
| 1180 | Top-Notch Insertions | combinatorics data structures | Statement | D | Codeforces Round 740 (Div. 1, основан на VK Cup 2021 - Финал (Engine)) {1558} | PROGRAMMING | 2000.0 | Codeforces Round #740 Editorial | 2600 |
| 2825 | Mocha and Stars | combinatorics dp fft math number theory | Statement | E | Codeforces Round 738 (Div. 2) {1559} | PROGRAMMING | 3000.0 | Tutorial (en) | 2200 |
| 13316 | Carrying Conundrum | bitmasks combinatorics dp | Statement | C | Codeforces Round 742 (Div. 2) {1567} | PROGRAMMING | 1500.0 | Codeforces Round #742 Editorial | |
| 13549 | Jury Meeting | combinatorics math | Statement | C | Educational Codeforces Round 113 (Rated for Div. 2) {1569} | PROGRAMMING | 94721 | ||
| 1114 | Coloring | combinatorics constructive algorithms implementation | Statement | E | Educational Codeforces Round 114 (Rated for Div. 2) {1574} | PROGRAMMING | 95188 | ||
| 795 | Occurrences | combinatorics dp dsu fft graphs | Statement | F | Educational Codeforces Round 114 (Rated for Div. 2) {1574} | PROGRAMMING | 95188 | ||
| 18339 | Combinatorics Homework | combinatorics greedy math | Statement | B | Educational Codeforces Round 114 (Rated for Div. 2) {1574} | PROGRAMMING | 95188 | ||
| 1368 | Mathematics Curriculum | combinatorics dp trees | Statement | B | Codeforces Round 745 (Div. 1) {1580} | PROGRAMMING | 1000.0 | Codeforces Round #745 Editorial | 2600 |
| 36674 | Luntik and Subsequences | combinatorics math | Statement | B | Codeforces Round 750 (Div. 2) {1582} | PROGRAMMING | 750.0 | Codeforces Round #750 (Div.2) Editorial | |
| 4057 | Guess the Permutation | binary search combinatorics interactive math | Statement | D | Технокубок 2022 - Отборочный Раунд 2 {1584} | PROGRAMMING | 1500.0 | Editorial for Technocup 2022 — Elimination Round 2 and Codeforces Round #755 (Div. 1, Div. 2) | 2000 |
| 1765 | Non-equal Neighbours | combinatorics dp math | Statement | F | Технокубок 2022 - Отборочный Раунд 3 {1585} | PROGRAMMING | 3000.0 | Codeforces Round #759 (Div. 2, based on Technocup 2022 Elimination Round 3) Editorial | |
| 398 | Omkar and Mosaic | combinatorics constructive algorithms math | Statement | I | Codeforces Round 749 (Div. 1 + Div. 2, основан на Отборочном раунде 1 Технокубка 2022) {1586} | PROGRAMMING | 4000.0 | Editorial for Technocup 2022 — Elimination Round 1 and Codeforces Round #749 (Div. 1+Div. 2) | |
| 336 | Non-equal Neighbours | combinatorics data structures dp math | Statement | F | Codeforces Round 759 (Div. 2, основан на Отборочном раунде 3 Технокубка 2022) {1591} | PROGRAMMING | 3000.0 | Codeforces Round #759 (Div. 2, based on Technocup 2022 Elimination Round 3) Editorial | |
| 12495 | Rubik's Cube Coloring (easy version) | combinatorics math | Statement | E1 | Codeforces Round 747 (Div. 2) {1594} | PROGRAMMING | 1000.0 | 95525 | 1300 |
| 2584 | Staircases | brute force combinatorics data structures dfs and similar dp | Statement | E | Educational Codeforces Round 115 (рейтинговый для Div. 2) {1598} | PROGRAMMING | 95890 | ||
| 10885 | Training Session | combinatorics math | Statement | D | Educational Codeforces Round 115 (рейтинговый для Div. 2) {1598} | PROGRAMMING | 95890 | ||
| 2074 | Bubble Strike | combinatorics math probabilities ternary search | Statement | C | Bubble Cup 14 - Finals Online Mirror (Unrated, ICPC Rules, Teams Preferred, Div. 1) {1599} | PROGRAMMING | BubbleCup2021.pdf | ||
| 692 | A Perfect Problem | combinatorics dp | Statement | E | Codeforces Round 752 (Div. 1) {1603} | PROGRAMMING | 3500.0 | Editorial of Codeforces Round #752 | |
| 406 | October 18, 2017 | combinatorics dp implementation math | Statement | F | Codeforces Round 752 (Div. 1) {1603} | PROGRAMMING | 3750.0 | Editorial of Codeforces Round #752 | |
| 438 | PalindORme | combinatorics dp | Statement | F | Codeforces Round 754 (Div. 2) {1605} | PROGRAMMING | 3500.0 | tutorial | 2900 |
| 4348 | Arena | combinatorics dp | Statement | E | Educational Codeforces Round 116 (рейтинговый для Div. 2) {1606} | PROGRAMMING | 96454 | ||
| 946 | MEX counting | combinatorics dp | Statement | F | Codeforces Round 758 (Div.1 + Div. 2) {1608} | PROGRAMMING | 2500.0 | Editorial of Codeforces Round #758 (Div.1 + Div. 2) | |
| 1629 | Dominoes | combinatorics fft graphs math | Statement | D | Codeforces Round 758 (Div.1 + Div. 2) {1608} | PROGRAMMING | 1500.0 | Editorial of Codeforces Round #758 (Div.1 + Div. 2) | |
| 3148 | Not Quite Lee | combinatorics math number theory | Statement | D | Codeforces Global Round 17 {1610} | PROGRAMMING | 2250.0 | Codeforces Global Round 17 Editorial | |
| 1052 | Max Sum Array | combinatorics constructive algorithms greedy sortings | Statement | G | Educational Codeforces Round 117 (рейтинговый для Div. 2) {1612} | PROGRAMMING | 97164 | ||
| 914 | Tree Coloring | combinatorics fft | Statement | F | Educational Codeforces Round 118 (рейтинговый для Div. 2) {1613} | PROGRAMMING | 97467 | ||
| 11494 | Divan and bitwise operations | bitmasks combinatorics constructive algorithms dp math | Statement | C | Codeforces Round 757 (Div. 2) {1614} | PROGRAMMING | 1500.0 | Tutorial | 1500 |
| 1203 | LEGOndary Grandmaster | combinatorics dp math | Statement | F | Codeforces Global Round 18 {1615} | PROGRAMMING | 3000.0 | Global Round 18 Editorial | |
| 1390 | Keep XOR Low | bitmasks combinatorics divide and conquer dp math | Statement | H | Good Bye 2021: 2022 is NEAR {1616} | PROGRAMMING | 4000.0 | Good Bye 2021 -- Editorial | 3000 |
| 1220 | Subsequences Galore | bitmasks combinatorics dp math | Statement | G | Educational Codeforces Round 119 (рейтинговый для Div. 2) {1620} | PROGRAMMING | 98061 | ||
| 4987 | Shuffle | combinatorics math two pointers | Statement | D | Educational Codeforces Round 120 (рейтинговый для Div. 2) {1622} | PROGRAMMING | Educational Codeforces Round 120 Editorial | ||
| 936 | A Random Code Problem | combinatorics dp math number theory | Statement | F | Educational Codeforces Round 121 (рейтинговый для Div. 2) {1626} | PROGRAMMING | 99136 | ||
| 3846 | Game on Sum (Easy Version) | combinatorics dp games | Statement | D1 | Codeforces Round 767 (Div. 1) {1628} | PROGRAMMING | 1000.0 | 99276 | |
| 2713 | Game on Sum (Hard Version) | combinatorics dp games | Statement | D2 | Codeforces Round 767 (Div. 1) {1628} | PROGRAMMING | 750.0 | 99276 | |
| 653 | Expected Components | combinatorics number theory probabilities | Statement | E | Codeforces Round 768 (Div. 1) {1630} | PROGRAMMING | 2500.0 | Editorial of Codeforces Round #768 | |
| 1558 | Two Arrays | bitmasks brute force combinatorics hashing probabilities two pointers | Statement | D | Codeforces Round 773 (Div. 1) {1641} | PROGRAMMING | 1750.0 | Codeforces Round #773 editorial | |
| 411 | Special Positions | combinatorics fft | Statement | E | Codeforces Round 773 (Div. 1) {1641} | PROGRAMMING | 2250.0 | Codeforces Round #773 editorial | |
| 3525 | Expand the Path | brute force combinatorics implementation math | Statement | E | Educational Codeforces Round 123 (рейтинговый для Div. 2) {1644} | PROGRAMMING | 100227 | ||
| 532 | Basis | combinatorics fft math number theory | Statement | F | Educational Codeforces Round 123 (рейтинговый для Div. 2) {1644} | PROGRAMMING | 100227 | ||
| 20191 | Weird Sum | combinatorics data structures geometry math matrices sortings | Statement | A | Codeforces Round 775 (Div. 1, по задачам Открытой олимпиады школьников по программированию) {1648} | PROGRAMMING | 500.0 | Codeforces Round #775 Editorial | |
| 3391 | Tyler and Strings | combinatorics data structures implementation strings | Statement | C | Codeforces Round 775 (Div. 1, по задачам Открытой олимпиады школьников по программированию) {1648} | PROGRAMMING | 1500.0 | Codeforces Round #775 Editorial | |
| 112 | Three Minimums | combinatorics fft math | Statement | H | Codeforces Round 778 (Div. 1 + Div. 2, основан на Финале Технокубка 2022) {1654} | PROGRAMMING | 4000.0 | Editorial of Codeforces Round #778 (Div. 1 + Div. 2, based on Technocup 2022 Final Round) | 3500 |
| 2592 | Star MST | combinatorics dp math | Statement | E | Educational Codeforces Round 125 (Rated for Div. 2) {1657} | PROGRAMMING | 101161 | ||
| 19715 | Marin and Anti-coprime Permutation | combinatorics math | Statement | B | Codeforces Round 779 (Div. 2) {1658} | PROGRAMMING | 1000.0 | Codeforces Round #779 (Div. 2) Editorial | |
| 1597 | Fancy Stack | combinatorics dp | Statement | F | 2021-2022 ICPC, NERC, Northern Eurasia Onsite (Unrated, Online Mirror, ICPC Rules, Teams Preferred) {1666} | PROGRAMMING | Tutorial (PDF) | ||
| 958 | Centroid Probabilities | combinatorics dp fft math | Statement | E | Codeforces Round 783 (Div. 1) {1667} | PROGRAMMING | 2750.0 | Codeforces Round #783 Editorial | 3000 |
| 1334 | Jee, You See? | bitmasks combinatorics dp | Statement | F | Codeforces Round 788 (Div. 2) {1670} | PROGRAMMING | 3000.0 | Tutorial | 2400 |
| 519 | Permutation Counting | brute force combinatorics dp fft math | Statement | F | Educational Codeforces Round 127 (Rated for Div. 2) {1671} | PROGRAMMING | 102181 | ||
| 3361 | Preorder | combinatorics divide and conquer dp dsu hashing trees | Statement | E | Educational Codeforces Round 127 (Rated for Div. 2) {1671} | PROGRAMMING | 102181 | ||
| 3654 | Lost Arithmetic Progression | combinatorics implementation math number theory | Statement | D | Codeforces Round 785 (Div. 2) {1673} | PROGRAMMING | 2000.0 | Codeforces Round #785 (Div. 2) Editorial | |
| 854 | Power or XOR? | combinatorics math number theory | Statement | E | Codeforces Round 785 (Div. 2) {1673} | PROGRAMMING | 2750.0 | Codeforces Round #785 (Div. 2) Editorial | |
| 26737 | Infinite Replacement | combinatorics implementation strings | Statement | C | Codeforces Round 786 (Div. 3) {1674} | PROGRAMMING | 102482 | ||
| 30036 | Dictionary | combinatorics math | Statement | B | Codeforces Round 786 (Div. 3) {1674} | PROGRAMMING | 102482 | ||
| 1462 | Typical Party in Dorm | bitmasks brute force combinatorics dp strings two pointers | Statement | E | Codeforces Round 791 (Div. 2) {1679} | PROGRAMMING | 2250.0 | Codeforces Round #791 (Div. 2) Editorial | |
| 330 | Become Big For Me | combinatorics constructive algorithms math number theory | Statement | E | Codeforces Round 796 (Div. 1) {1687} | PROGRAMMING | 2000.0 | Editorial of Codeforces Round 796 | |
| 1199 | 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) | |
| 221 | 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 | |
| 5052 | Placing Jinas | combinatorics math | Statement | E | Codeforces Global Round 21 {1696} | PROGRAMMING | 2000.0 | Editorial of Codeforces Global Round 21 | |
| 1493 | Coloring | brute force combinatorics constructive algorithms dfs and similar dp dsu graphs implementation | Statement | E | Educational Codeforces Round 130 (рейтинговый для Div. 2) {1697} | PROGRAMMING | 103835 | ||
| 1883 | PermutationForces II | binary search brute force combinatorics constructive algorithms greedy sortings | Statement | E | Codeforces Round 803 (Div. 2) {1698} | PROGRAMMING | 2000.0 | Codeforces Round #803 (Div. 2) Editorial | |
| 10866 | The Third Problem | combinatorics math two pointers | Statement | C | Codeforces Round 804 (Div. 2) {1699} | PROGRAMMING | 1500.0 | Codeforces Round #804 (Div. 2) Editorial | |
| 1220 | Points | combinatorics data structures math matrices | Statement | F | Educational Codeforces Round 131 (рейтинговый для Div. 2) {1701} | PROGRAMMING | Educational Codeforces Round 131 Editorial | ||
| 400 | Game of AI (easy version) | combinatorics fft math | Statement | H1 | CodeTON Round 2 (Div. 1 + Div. 2, Rated, Prizes!) {1704} | PROGRAMMING | 2250.0 | CodeTON Round 2 Editorial | |
| 119 | Game of AI (hard version) | combinatorics fft math | Statement | H2 | CodeTON Round 2 (Div. 1 + Div. 2, Rated, Prizes!) {1704} | PROGRAMMING | 2750.0 | CodeTON Round 2 Editorial | |
| 2540 | Mark and Professor Koro | binary search bitmasks combinatorics data structures greedy | Statement | E | Codeforces Round 807 (Div. 2) {1705} | PROGRAMMING | 2500.0 | Codeforces Round #807 (Div 2.) Editorial | |
| 7246 | Mark and Lightbulbs | combinatorics constructive algorithms math sortings | Statement | D | Codeforces Round 807 (Div. 2) {1705} | PROGRAMMING | 1750.0 | Codeforces Round #807 (Div 2.) Editorial | |
| 1028 | Partial Virtual Trees | combinatorics dp math trees | Statement | D | Codeforces Round 808 (Div. 1) {1707} | PROGRAMMING | 1750.0 | 104930 | |
| 2551 | LCM Sum (easy version) | binary search brute force combinatorics math number theory two pointers | Statement | E1 | Codeforces Round 813 (Div. 2) {1712} | PROGRAMMING | 2000.0 | Codeforces Round #813 (Div. 2) Editorial | |
| 1694 | LCM Sum (hard version) | combinatorics data structures math number theory two pointers | Statement | E2 | Codeforces Round 813 (Div. 2) {1712} | PROGRAMMING | 750.0 | Codeforces Round #813 (Div. 2) Editorial | |
| 789 | Lost Array | bitmasks combinatorics constructive algorithms dp math | Statement | F | Codeforces Round 812 (Div. 2) {1713} | PROGRAMMING | 3000.0 | Codeforces Round #812 (Div. 2) Editorial | 2900 |
| 10732 | Monoblock | brute force combinatorics data structures divide and conquer greedy implementation | Statement | C | Codeforces Round 816 (Div. 2) {1715} | PROGRAMMING | 1750.0 | Codeforces Round #816 (Div. 2) editorial | |
| 1484 | Bags with Balls | combinatorics math number theory | Statement | F | Educational Codeforces Round 133 (рейтинговый для Div. 2) {1716} | PROGRAMMING | 105653 | ||
| 4952 | Madoka and The Corruption Scheme | combinatorics math | Statement | D | Codeforces Round 818 (Div. 2) {1717} | PROGRAMMING | 2000.0 | Codeforces Round #818 (Div. 2) Editorial. | 1900 |
| 2011 | Circular Mirror | binary search combinatorics math two pointers | Statement | C | COMPFEST 14 - Preliminary Online Mirror (Unrated, ICPC Rules, Teams Preferred) {1725} | PROGRAMMING | Tutorial | ||
| 645 | Electrical Efficiency | combinatorics data structures dp number theory trees | Statement | E | COMPFEST 14 - Preliminary Online Mirror (Unrated, ICPC Rules, Teams Preferred) {1725} | PROGRAMMING | Tutorial | ||
| 371 | Imitating the Key Tree | combinatorics dsu trees | Statement | I | COMPFEST 14 - Preliminary Online Mirror (Unrated, ICPC Rules, Teams Preferred) {1725} | PROGRAMMING | Tutorial | ||
| 1787 | Almost Perfect | combinatorics fft math | Statement | E | Codeforces Round 819 (Div. 1 + Div. 2) and Grimoire of Code Annual Contest 2022 {1726} | PROGRAMMING | 2250.0 | Codeforces Round #819 (Div. 1 + Div. 2) and Grimoire of Code Annual Contest 2022 Editorial | |
| 514 | A Certain Magical Party | combinatorics greedy sortings | Statement | G | Codeforces Round 819 (Div. 1 + Div. 2) and Grimoire of Code Annual Contest 2022 {1726} | PROGRAMMING | 3250.0 | Codeforces Round #819 (Div. 1 + Div. 2) and Grimoire of Code Annual Contest 2022 Editorial | |
| 672 | Illumination | combinatorics dp | Statement | G | Educational Codeforces Round 135 (Rated for Div. 2) {1728} | PROGRAMMING | 106805 | ||
| 2613 | Cut Substrings | combinatorics dp hashing strings two pointers | Statement | G | Codeforces Round 820 (Div. 3) {1729} | PROGRAMMING | Codeforces Round #820 (Div. 3) Editorial | ||
| 823 | Maximums and Minimums | combinatorics combinatorics data structures number theory | Statement | E | Codeforces Round 823 (Div. 2) {1730} | PROGRAMMING | 2250.0 | Codeforces Round #823 — editorial | 2700 |
| 930 | Function Sum | brute force combinatorics dp fft math | Statement | F | Codeforces Round 841 (Div. 2) and Divide by Zero 2022 {1731} | PROGRAMMING | 2750.0 | Codeforces Round #841 (Div. 2) and Divide By Zero 2022 Editorial | |
| 7152 | Meta-set | brute force combinatorics data structures hashing math | Statement | D | Codeforces Round 824 (Div. 2) {1735} | PROGRAMMING | 1750.0 | Codeforces Round #824 — editorial | |
| 1868 | 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> | |
| 10275 | Card Game | combinatorics constructive algorithms dp games | Statement | C | Educational Codeforces Round 136 (Rated for Div. 2) {1739} | PROGRAMMING | Educational Codeforces Round 136 Editorial | ||
| 1167 | Conditional Mix | combinatorics dp math | Statement | F | Codeforces Round 831 (Div. 1 + Div. 2) {1740} | PROGRAMMING | 2500.0 | Tutorial | 2600 |
| 1892 | 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 | |
| 446 | Antifibonacci Cut | bitmasks combinatorics dp math | Statement | G | Educational Codeforces Round 137 (Rated for Div. 2) {1743} | PROGRAMMING | Educational Codeforces Round 137 Editorial | 3000 | |
| 30034 | Password | combinatorics implementation | Statement | A | Educational Codeforces Round 137 (Rated for Div. 2) {1743} | PROGRAMMING | Educational Codeforces Round 137 Editorial | 800 | |
| 713 | List Generation | combinatorics math | Statement | E | Codeforces Round 832 (Div. 2) {1747} | PROGRAMMING | 2500.0 | Codeforces Round #832 (Div. 2) Editorial | |
| 3342 | ConstructOR | bitmasks chinese remainder theorem combinatorics constructive algorithms number theory | Statement | D | Codeforces Round 833 (Div. 2) {1748} | PROGRAMMING | 2000.0 | Codeforces Round #833 (Div. 2) Editorial | 2100 |
| 7720 | 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 |