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Solved |
Name |
Tags |
Solutions |
Index |
Contest |
Type |
Points |
Tutorial |
Rating Level |
|---|---|---|---|---|---|---|---|---|---|
| 17984 | Longest Regular Bracket Sequence | constructive algorithms data structures dp greedy sortings strings | Statement | C | Codeforces Beta Round 5 {5} | PROGRAMMING | C, D и E с CBR5 - разбор | 1900 | |
| 916 | Tricky and Clever Password | binary search constructive algorithms data structures greedy hashing strings | Statement | E | Codeforces Beta Round 30 (Codeforces format) {30} | PROGRAMMING | Codeforces Beta Round #30. Tutorial for problem A | 2700 | |
| 641 | Director | constructive algorithms greedy | Statement | E | School Team Contest 3 (Winter Computer School 2010/11) {45} | PROGRAMMING | 2100 | ||
| 1047 | Russian Roulette | constructive algorithms greedy | Statement | C | Codeforces Beta Round 80 (Div. 1 Only) {103} | PROGRAMMING | Tutorial | 1900 | |
| 11005 | Lucky String | constructive algorithms strings | Statement | B | Codeforces Beta Round 84 (Div. 2 Only) {110} | PROGRAMMING | Codeforces Beta Round #84 - Analysis | 1100 | |
| 2860 | String | brute force constructive algorithms hashing implementation string suffix structures strings | Statement | B | Codeforces Beta Round 94 (Div. 1 Only) {128} | PROGRAMMING | 3219 | 2200 | |
| 662 | Headquarters | constructive algorithms math | Statement | A | Croc Champ 2012 - Final {183} | PROGRAMMING | CROC Champ 2012 — Round 3 (Editorial) | 1900 | |
| 603 | Hamming Distance | constructive algorithms greedy math matrices | Statement | C | Codeforces Round 122 (Div. 1) {193} | PROGRAMMING | Editoral Codeforces Round #122 | 2400 | |
| 10164 | XOR and OR | constructive algorithms implementation math | Statement | C | Codeforces Round 173 (Div. 2) {282} | PROGRAMMING | Round #173 — Editorial | 1600 | |
| 8141 | Removing Columns | brute force constructive algorithms implementation | Statement | C | Codeforces Round 283 (Div. 2) {496} | PROGRAMMING | 15208 | 1600 | |
| 9536 | Vitaly and Strings | constructive algorithms strings | Statement | A | Codeforces Round 293 (Div. 2) {518} | PROGRAMMING | Codeforces Round #293 (Div.2) Editorial | 1600 | |
| 10212 | Pasha and String | constructive algorithms greedy math strings | Statement | B | Codeforces Round 297 (Div. 2) {525} | PROGRAMMING | Codeforces Round #297 (Div.2) Editorial | 1500 | |
| 2428 | Correcting Mistakes | constructive algorithms dp greedy hashing strings two pointers | Statement | E | VK Cup 2015 - Round 2 (unofficial online mirror, Div. 1 only) {533} | PROGRAMMING | Разбор VK Cup Round 2 | 1800 | |
| 4061 | ZgukistringZ | brute force constructive algorithms implementation strings | Statement | B | Codeforces Round 307 (Div. 2) {551} | PROGRAMMING | Tutorial | 1800 | |
| 718 | CNF 2 | constructive algorithms dfs and similar graphs greedy | Statement | C | Codeforces Round 317 [AimFund Thanks-Round] (Div. 1) {571} | PROGRAMMING | Codeforces Round #317 [AimFund Thanks-Round] Editorial | 2600 | |
| 6528 | Marina and Vasya | constructive algorithms greedy strings | Statement | C | Codeforces Round 324 (Div. 2) {584} | PROGRAMMING | Tutorial | 1700 | |
| 7050 | Make Palindrome | constructive algorithms greedy strings | Statement | C | Educational Codeforces Round 2 {600} | PROGRAMMING | Editorial | 1800 | |
| 699 | New Year and Forgotten Tree | constructive algorithms flows graphs | Statement | H | Good Bye 2015 {611} | PROGRAMMING | Tutorial | 3000 | |
| 11437 | War of the Corporations | constructive algorithms greedy strings | Statement | B | Codeforces Round 342 (Div. 2) {625} | PROGRAMMING | Codeforces Round #342 (Div. 2) : editorial | 1300 | |
| 898 | Restore a Number | brute force constructive algorithms strings | Statement | F | Codeforces Round 350 (Div. 2) {670} | PROGRAMMING | Codeforces Round #350 (Div.2) Editorial | 2200 | |
| 18481 | Different is Good | constructive algorithms implementation strings | Statement | B | Codeforces Round 352 (Div. 2) {672} | PROGRAMMING | 1000 | ||
| 9794 | Letters Cyclic Shift | constructive algorithms greedy implementation strings | Statement | A | AIM Tech Round 3 (Div. 1) {708} | PROGRAMMING | Editorial | 1200 | |
| 2884 | Hidden Word | brute force constructive algorithms implementation strings | Statement | C | Canada Cup 2016 {725} | PROGRAMMING | Canada Cup Editorial | 1600 | |
| 3247 | Delete Them | constructive algorithms implementation | Statement | H | 2016-2017 ACM-ICPC, NEERC, Southern Subregional Contest (Online Mirror, ACM-ICPC Rules, Teams Preferred) {730} | PROGRAMMING | Разбор задач (видео, по-русски) | 1400 | |
| 2044 | Santa Claus and a Palindrome | constructive algorithms data structures greedy | Statement | D | Technocup 2017 - Elimination Round 3 {748} | PROGRAMMING | Codeforces Round 389 (Div.2) Editorial | 2000 | |
| 1094 | Vladik and chat | brute force constructive algorithms dp implementation strings | Statement | C | Codeforces Round 390 (Div. 2) {754} | PROGRAMMING | 2200 | ||
| 2934 | Ability To Convert | constructive algorithms dp greedy math strings | Statement | D | Codeforces Round 392 (Div. 2) {758} | PROGRAMMING | Codeforces Round #392 (Div. 2) Editorial | 1900 | |
| 34452 | Mahmoud and Longest Uncommon Subsequence | constructive algorithms strings | Statement | A | Codeforces Round 396 (Div. 2) {766} | PROGRAMMING | Codeforces round #396 editorial | 1000 | |
| 7180 | Bear and Different Names | constructive algorithms greedy | Statement | B | VK Cup 2017 - Round 1 {771} | PROGRAMMING | VK Cup 2017 Round 1 and CF Round 405 — Editorial | 1500 | |
| 23793 | Mike and palindrome | brute force constructive algorithms strings | Statement | A | Codeforces Round 410 (Div. 2) {798} | PROGRAMMING | Codeforces Round #410 (Div. 2) Editorial | 1100 | |
| 11179 | Valued Keys | constructive algorithms greedy strings | Statement | B | Codeforces Round 409 (rated, Div. 2, based on VK Cup 2017 Round 2) {801} | PROGRAMMING | 1000 | ||
| 550 | Fake News (medium) | constructive algorithms strings | Statement | G2 | Helvetic Coding Contest 2017 online mirror (teams allowed, unrated) {802} | PROGRAMMING | helvetic-coding-contest-2017-editorial.pdf | 2200 | |
| 544 | Fake News (medium) | constructive algorithms strings | Statement | H | Helvetic Coding Contest 2017 online mirror (teams allowed, unrated) {802} | PROGRAMMING | helvetic-coding-contest-2017-editorial.pdf | 2400 | |
| 1950 | Restoration of string | constructive algorithms graphs implementation | Statement | D | Технокубок 2018 - Отборочный Раунд 3 {886} | PROGRAMMING | Editorial Codeforces Round 445 (and Technocup 2018 — Elimination Round 3) | 2000 | |
| 1258 | Picking Strings | constructive algorithms implementation strings | Statement | D | VK Cup 2018 - Round 1 {923} | PROGRAMMING | VK Cup 2018 Round 1 and CF Round #470 (div. 1 & 2) editorial | 2500 | |
| 1257 | Lock Puzzle | constructive algorithms implementation strings | Statement | C | Codeforces Round 467 (Div. 1) {936} | PROGRAMMING | Codeforces Round #467, Editorial | 2500 | |
| 6680 | Phone Numbers | constructive algorithms implementation strings | Statement | C | Codeforces Round 466 (Div. 2) {940} | PROGRAMMING | [Editorial] Codeforces Round #466 (Div. 2) | 1500 | |
| 7280 | A Tide of Riverscape | constructive algorithms strings | Statement | B | Codeforces Round 487 (Div. 2) {989} | PROGRAMMING | Codeforces Round #487 (Div. 2) Editorial | 1300 | |
| 426 | AB-Strings | constructive algorithms strings | Statement | D | Codeforces Round 500 (Div. 1) [based on EJOI] {1012} | PROGRAMMING | 60920 | 2700 | |
| 514 | Chips Puzzle | constructive algorithms implementation math | Statement | E | Mail.Ru Cup 2018 Round 1 {1054} | PROGRAMMING | Editorial | 2400 | |
| 11048 | Oh Those Palindromes | constructive algorithms strings | Statement | A | Codeforces Round 516 (Div. 1, by Moscow Team Olympiad) {1063} | PROGRAMMING | Editorial | 1400 | |
| 17672 | Letters Rearranging | constructive algorithms greedy sortings strings | Statement | B | Educational Codeforces Round 56 (Rated for Div. 2) {1093} | PROGRAMMING | 63877 | 900 | |
| 4536 | Sasha and One More Name | constructive algorithms hashing strings | Statement | B | Codeforces Round 539 (Div. 1) {1109} | PROGRAMMING | Codeforces Round #539 Editorial | 1800 | |
| 2380 | The minimal unique substring | constructive algorithms math strings | Statement | B | Codeforces Round 559 (Div. 1) {1158} | PROGRAMMING | 66993 | 2200 | |
| 4502 | Archaeology | brute force constructive algorithms greedy strings | Statement | E | Codeforces Global Round 4 {1178} | PROGRAMMING | E | 1900 | |
| 5455 | Print a 1337-string... | combinatorics constructive algorithms math strings | Statement | D | Educational Codeforces Round 70 (Rated for Div. 2) {1202} | PROGRAMMING | 68972 | 1900 | |
| 11923 | Swap Letters | constructive algorithms greedy | Statement | C | Codeforces Round 585 (Div. 2) {1215} | PROGRAMMING | Codeforces Round #585 Editorial | 1500 | |
| 932 | Middle-Out | constructive algorithms greedy strings | Statement | E | Dasha Code Championship - Novosibirsk Finals Round (only for onsite-finalists) {1231} | PROGRAMMING | Dasha Code Championship Finals and Mirror Round 588 Editorial | 2000 | |
| 3620 | Equalizing Two Strings | constructive algorithms sortings strings | Statement | F | Codeforces Round 598 (Div. 3) {1256} | PROGRAMMING | Codeforces Round #598 (Div. 3) Editorial | 2200 | |
| 15923 | Beautiful String | constructive algorithms greedy | Statement | A | Codeforces Round 604 (Div. 2) {1265} | PROGRAMMING | Codeforces Round #604 Editorial | 1000 | |
| 3351 | Lexicography | constructive algorithms strings | Statement | L | 2019-2020 ICPC, NERC, Northern Eurasia Finals (Unrated, Online Mirror, ICPC Rules, Teams Preferred) {1267} | PROGRAMMING | nerc-2019-tutorial.pdf | 1800 | |
| 9060 | Long Beautiful Integer | constructive algorithms greedy implementation strings | Statement | A | Codeforces Round 609 (Div. 1) {1268} | PROGRAMMING | Codeforces Round #609 — Editorial | 1700 | |
| 2371 | Enchanted Artifact | constructive algorithms interactive strings | Statement | D | Codeforces Round 610 (Div. 2) {1282} | PROGRAMMING | 72461 | 2300 | |
| 1577 | Madhouse (Easy version) | brute force constructive algorithms interactive math | Statement | C1 | Codeforces Round 612 (Div. 1) {1286} | PROGRAMMING | Codeforces Round #612 - Editorial | 2400 | |
| 744 | Madhouse (Hard version) | brute force constructive algorithms hashing interactive math | Statement | C2 | Codeforces Round 612 (Div. 1) {1286} | PROGRAMMING | Codeforces Round #612 - Editorial | 2900 | |
| 7075 | Irreducible Anagrams | binary search constructive algorithms data structures strings two pointers | Statement | B | Codeforces Round 616 (Div. 1) {1290} | PROGRAMMING | 1000.0 | Codeforces Round #616 Editorial | 1900 |
| 18743 | Longest Palindrome | brute force constructive algorithms greedy implementation strings | Statement | B | Codeforces Round 620 (Div. 2) {1304} | PROGRAMMING | 1000.0 | Codeforces Round #620 (Div. 2) Editorial | 1100 |
| 12348 | Kuroni and Simple Strings | constructive algorithms greedy strings two pointers | Statement | B | Ozon Tech Challenge 2020 (Div.1 + Div.2, Rated, T-shirts + prizes!) {1305} | PROGRAMMING | 1000.0 | Ozon Tech Challenge 2020 Editorial | 1300 |
| 11719 | String Modification | brute force constructive algorithms implementation sortings strings | Statement | B | CodeCraft-20 (Div. 2) {1316} | PROGRAMMING | 1000.0 | Codecraft-20 (Div.2) Editorial | 1400 |
| 535 | Dreamoon Likes Strings | constructive algorithms data structures | Statement | D | Codeforces Round 631 (Div. 1) - Thanks, Denis aramis Shitov! {1329} | PROGRAMMING | 2000.0 | Codeforces Round #631 Editorial | 3000 |
| 24569 | Binary Period | constructive algorithms strings | Statement | B | Educational Codeforces Round 86 (Rated for Div. 2) {1342} | PROGRAMMING | 76633 | 1200 | |
| 15469 | Phoenix and Distribution | constructive algorithms greedy strings | Statement | C | Codeforces Round 638 (Div. 2) {1348} | PROGRAMMING | 1500.0 | Codeforces Round #638 (Div. 2) Editorial | 1600 |
| 19353 | Binary String Reconstruction | constructive algorithms dfs and similar math | Statement | F | Codeforces Round 640 (Div. 4) {1352} | PROGRAMMING | 77161 | 1500 | |
| 13499 | Spy-string | bitmasks brute force constructive algorithms dp hashing strings | Statement | F | Codeforces Round 644 (Div. 3) {1360} | PROGRAMMING | Codeforces Round #644 (Div. 3) Editorial | 1700 | |
| 8768 | Task On The Board | constructive algorithms greedy implementation sortings | Statement | D | Codeforces Round 650 (Div. 3) {1367} | PROGRAMMING | Codeforces Round #650 (Div. 3) Editorial | ||
| 21315 | Codeforces Subsequences | brute force constructive algorithms greedy math strings | Statement | B | Codeforces Global Round 8 {1368} | PROGRAMMING | 1000.0 | Codeforces Global Round 8: editorial | |
| 52280 | 01 Game | brute force constructive algorithms dp games implementation strings | Statement | B | Educational Codeforces Round 90 (Rated for Div. 2) {1373} | PROGRAMMING | Educational Codeforces Round 90 Editorial | ||
| 21699 | Prefix Flip (Easy Version) | constructive algorithms data structures strings | Statement | A1 | Codeforces Round 658 (Div. 1) {1381} | PROGRAMMING | 500.0 | Codeforces Round #658 Editorial | 1300 |
| 14276 | Prefix Flip (Hard Version) | constructive algorithms data structures strings two pointers | Statement | A2 | Codeforces Round 658 (Div. 1) {1381} | PROGRAMMING | 500.0 | Codeforces Round #658 Editorial | 1700 |
| 19598 | Common Prefixes | constructive algorithms greedy strings | Statement | A | Codeforces Round 659 (Div. 2) {1384} | PROGRAMMING | 500.0 | Codeforces Round #659 Editorial | |
| 9747 | Omkar and Bed Wars | constructive algorithms dp greedy math strings | Statement | D | Codeforces Global Round 10 {1392} | PROGRAMMING | 1500.0 | Codeforces Global Round 10 — Editorial | |
| 18475 | Binary String Reconstruction | 2-sat constructive algorithms greedy strings | Statement | C | Educational Codeforces Round 94 (Rated for Div. 2) {1400} | PROGRAMMING | 81942 | ||
| 27940 | String Similarity | brute force constructive algorithms strings | Statement | A | Educational Codeforces Round 94 (Rated for Div. 2) {1400} | PROGRAMMING | 81942 | ||
| 13496 | Palindromifier | constructive algorithms strings | Statement | C | Codeforces Round 676 (Div. 2) {1421} | PROGRAMMING | 1500.0 | Codeforces Round #676 (Div. 2) Editorial | |
| 20809 | Reverse Binary Strings | constructive algorithms greedy | Statement | B | Educational Codeforces Round 97 (Rated for Div. 2) {1437} | PROGRAMMING | 84149 | ||
| 18475 | Avoid Trygub | constructive algorithms sortings | Statement | A | Codeforces Global Round 12 {1450} | PROGRAMMING | 500.0 | Codeforces Global Round 12 Editorial | |
| 18994 | String Generation | constructive algorithms greedy | Statement | A | Codeforces Round 689 (Div. 2, based on Zed Code Competition) {1461} | PROGRAMMING | 500.0 | Codeforces Round #689 (Div. 2). Editorial | |
| 5869 | Unusual Matrix | 2-sat constructive algorithms greedy | Statement | F | Codeforces Round 697 (Div. 3) {1475} | PROGRAMMING | Codeforces Round #697 (Div. 3) Editorial | ||
| 12390 | Fence Painting | brute force constructive algorithms greedy implementation | Statement | C | Codeforces Round 699 (Div. 2) {1481} | PROGRAMMING | 1500.0 | Codeforces Round #699 (Div. 2) Editorial | |
| 4847 | AB Graph | constructive algorithms graphs greedy implementation strings | Statement | D | Codeforces Round 699 (Div. 2) {1481} | PROGRAMMING | 2000.0 | Codeforces Round #699 (Div. 2) Editorial | |
| 22231 | Split it! | brute force constructive algorithms greedy strings | Statement | A | Codeforces Round 706 (Div. 2) {1496} | PROGRAMMING | 500.0 | Codeforces Round #706 Editorial | |
| 21960 | Domino on Windowsill | constructive algorithms math | Statement | A | Educational Codeforces Round 106 (Rated for Div. 2) {1499} | PROGRAMMING | Educational Codeforces Round 106 Editorial | ||
| 25540 | Flip the Bits | constructive algorithms greedy implementation math | Statement | B | Codeforces Round 712 (Div. 2) {1504} | PROGRAMMING | 1000.0 | Codeforces Round #712 Editorial | 1200 |
| 22778 | Déjà Vu | constructive algorithms strings | Statement | A | Codeforces Round 712 (Div. 2) {1504} | PROGRAMMING | 500.0 | Codeforces Round #712 Editorial | 800 |
| 6662 | Binary Literature | constructive algorithms greedy implementation math strings two pointers | Statement | A | Codeforces Round 715 (Div. 1) {1508} | PROGRAMMING | 750.0 | Codeforces Round #715 Editorial | |
| 12429 | Min Cost String | brute force constructive algorithms dfs and similar graphs greedy | Statement | D | Educational Codeforces Round 107 (Rated for Div. 2) {1511} | PROGRAMMING | 89634 | ||
| 21676 | A-B Palindrome | constructive algorithms implementation strings | Statement | C | Codeforces Round 713 (Div. 3) {1512} | PROGRAMMING | Codeforces Round #713 (Div. 3) Editorial | ||
| 2791 | Kill Anton | brute force constructive algorithms data structures math strings | Statement | D | Codeforces Round 723 (Div. 2) {1526} | PROGRAMMING | 2250.0 | Codeforces Round #723 (Div. 2) Editorial | |
| 1413 | 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 | |
| 3250 | Minimax | constructive algorithms greedy implementation strings | Statement | E | Codeforces Round 733 (Div. 1 + Div. 2, based on VK Cup 2021 - Elimination (Engine)) {1530} | PROGRAMMING | 2000.0 | Codeforces Round #733 Editorial (all problems) | |
| 15224 | Another Problem About Dividing Numbers | constructive algorithms number theory | Statement | D | Codeforces Round 725 (Div. 3) {1538} | PROGRAMMING | Codeforces Round #725 (Div. 3) Editorial | ||
| 10544 | Diane | constructive algorithms greedy strings | Statement | D | Codeforces Round 735 (Div. 2) {1554} | PROGRAMMING | 2000.0 | Editorial of Codeforces Round #735 (Div. 2) | 1800 |
| 21177 | MIN-MEX Cut | bitmasks constructive algorithms dp | Statement | B | Codeforces Global Round 16 {1566} | PROGRAMMING | 750.0 | Codeforces Global Round 16 Editorial | |
| 37181 | AB Balance | constructive algorithms strings | Statement | A | Educational Codeforces Round 116 (Rated for Div. 2) {1606} | PROGRAMMING | 96454 | ||
| 16993 | Forbidden Subsequence | constructive algorithms sortings strings | Statement | A | Codeforces Round 761 (Div. 2) {1617} | PROGRAMMING | 750.0 | Editorial for Codeforces Round #761 (Div. 2) | |
| 4585 | Masha-forgetful | brute force constructive algorithms dp hashing implementation strings | Statement | E | Codeforces Round 764 (Div. 3) {1624} | PROGRAMMING | Codeforces Round #764 (Div. 3) Editorial | ||
| 26796 | Division by Two and Permutation | constructive algorithms flows graph matchings greedy math | Statement | C | Codeforces Round 764 (Div. 3) {1624} | PROGRAMMING | Codeforces Round #764 (Div. 3) Editorial | ||
| 22654 | Quality vs Quantity | brute force constructive algorithms greedy sortings two pointers | Statement | B | Codeforces Round 774 (Div. 2) {1646} | PROGRAMMING | 1000.0 | Codeforces Round #774 (Div. 2) Editorial | 800 |
| 12015 | Bit Flipping | bitmasks constructive algorithms greedy strings | Statement | B | Codeforces Round 782 (Div. 2) {1659} | PROGRAMMING | 750.0 | Codeforces Round #782 (Div. 2) Editorial | |
| 6934 | Cyclic Rotation | constructive algorithms greedy implementation two pointers | Statement | D | Codeforces Global Round 20 {1672} | PROGRAMMING | 1000.0 | Global Round 20 Editorial | 1700 |
| 16448 | I love AAAB | constructive algorithms implementation | Statement | B | Codeforces Global Round 20 {1672} | PROGRAMMING | 500.0 | Global Round 20 Editorial | 800 |
| 275 | Hard Cut | constructive algorithms divide and conquer math | Statement | H | Codeforces Round 792 (Div. 1 + Div. 2) {1684} | PROGRAMMING | 3250.0 | Codeforces Round #792 (Div. 1 + Div. 2) Editorial | 3400 |
| 17193 | Sum of Substrings | brute force constructive algorithms greedy math strings | Statement | C | CodeCraft-22 and Codeforces Round 795 (Div. 2) {1691} | PROGRAMMING | 1250.0 | Editorial for CodeCraft-22 and Codeforces Round #795 (Div. 2) | |
| 20580 | Paranoid String | constructive algorithms greedy | Statement | B | Codeforces Round 800 (Div. 2) {1694} | PROGRAMMING | 1000.0 | Codeforces Round #800 Editorial | 1200 |
| 1127 | Tree Recovery | bitmasks brute force constructive algorithms dfs and similar dsu graphs trees | Statement | F | Codeforces Global Round 21 {1696} | PROGRAMMING | 2500.0 | Editorial of Codeforces Global Round 21 | |
| 15770 | awoo's Favorite Problem | constructive algorithms data structures dp greedy implementation strings two pointers | Statement | C | Educational Codeforces Round 130 (Rated for Div. 2) {1697} | PROGRAMMING | 103835 | ||
| 756 | Equal Reversal | constructive algorithms graphs math | Statement | F | Codeforces Round 803 (Div. 2) {1698} | PROGRAMMING | 2500.0 | Codeforces Round #803 (Div. 2) Editorial | |
| 9433 | Equate Multisets | constructive algorithms data structures graph matchings greedy math number theory | Statement | F | Codeforces Round 805 (Div. 3) {1702} | PROGRAMMING | 104763 | ||
| 133 | Mio and Lucky Array | constructive algorithms fft math strings | Statement | G | CodeTON Round 2 (Div. 1 + Div. 2, Rated, Prizes!) {1704} | PROGRAMMING | 3500.0 | CodeTON Round 2 Editorial | |
| 22666 | Optimal Reduction | constructive algorithms sortings | Statement | B | Codeforces Round 812 (Div. 2) {1713} | PROGRAMMING | 1000.0 | Codeforces Round #812 (Div. 2) Editorial | 1000 |
| 8226 | Letter Picking | constructive algorithms dp games | Statement | D | Educational Codeforces Round 135 (Rated for Div. 2) {1728} | PROGRAMMING | 106805 | ||
| 21607 | Jumping on Tiles | constructive algorithms strings | Statement | C | Codeforces Round 820 (Div. 3) {1729} | PROGRAMMING | Codeforces Round #820 (Div. 3) Editorial | ||
| 3019 | Prefixes and Suffixes | constructive algorithms dsu strings | Statement | D | Codeforces Round 823 (Div. 2) {1730} | PROGRAMMING | 2250.0 | Codeforces Round #823 — editorial | 2200 |
| 2763 | Equal Binary Subsequences | constructive algorithms greedy strings | Statement | D | Codeforces Round 825 (Div. 2) {1736} | PROGRAMMING | 2000.0 | Codeforces Round #825 (Div. 2) Editorial | |
| 549 | Anti-Increasing Addicts | constructive algorithms dfs and similar dp greedy | Statement | G | Codeforces Global Round 22 {1738} | PROGRAMMING | 3000.0 | Editorial of Codeforces Global Round <strong>22</strong> | |
| 18718 | Prefix Sum Addicts | constructive algorithms math sortings | Statement | B | Codeforces Global Round 22 {1738} | PROGRAMMING | 1000.0 | Editorial of Codeforces Global Round <strong>22</strong> | |
| 13978 | Smaller | constructive algorithms greedy strings | Statement | F | Codeforces Round 827 (Div. 4) {1742} | PROGRAMMING | 107962 | ||
| 10471 | Complementary XOR | constructive algorithms data structures | Statement | C | CodeTON Round 3 (Div. 1 + Div. 2, Rated, Prizes!) {1750} | PROGRAMMING | 1250.0 | CodeTON Round 3 (Div. 1 + Div. 2) Editorial | |
| 121 | BinaryStringForces | constructive algorithms data structures | Statement | H | CodeTON Round 3 (Div. 1 + Div. 2, Rated, Prizes!) {1750} | PROGRAMMING | 3500.0 | CodeTON Round 3 (Div. 1 + Div. 2) Editorial | |
| 17799 | Indirect Sort | constructive algorithms math | Statement | A | CodeTON Round 3 (Div. 1 + Div. 2, Rated, Prizes!) {1750} | PROGRAMMING | 500.0 | CodeTON Round 3 (Div. 1 + Div. 2) Editorial | |
| 27019 | SSeeeeiinngg DDoouubbllee | constructive algorithms strings | Statement | A | Codeforces Round 836 (Div. 2) {1758} | PROGRAMMING | 500.0 | Codeforces Round #836 (Div. 2) Editorial | |
| 136 | Unequal Adjacent Elements | constructive algorithms sortings | Statement | G | Codeforces Round 838 (Div. 2) {1762} | PROGRAMMING | 3500.0 | Codeforces Round #838 (Div. 2) Editorial | |
| 15681 | Elemental Decompress | constructive algorithms greedy implementation sortings | Statement | C | Codeforces Round 842 (Div. 2) {1768} | PROGRAMMING | 1500.0 | Codeforces Round #842 (Div. 2) Editorial | |
| 19923 | Gardener and the Capybaras (hard version) | constructive algorithms greedy strings | Statement | A2 | Codeforces Round 843 (Div. 2) {1775} | PROGRAMMING | 500.0 | Codeforces Round #843 (Div. 2) Editorial | |
| 2370 | Another Wine Tasting Event | combinatorics constructive algorithms strings | Statement | G | SWERC 2022-2023 - Online Mirror (Unrated, ICPC Rules, Teams Preferred) {1776} | PROGRAMMING | |||
| 24037 | Hall of Fame | constructive algorithms greedy math strings | Statement | A | Hello 2023 {1779} | PROGRAMMING | 500.0 | ||
| 19425 | Matching Numbers | constructive algorithms greedy math | Statement | C | Codeforces Round 851 (Div. 2) {1788} | PROGRAMMING | 1500.0 | Codeforces Round #851 (Div. 2) Editorial | |
| 1928 | Serval and Shift-Shift-Shift | bitmasks brute force constructive algorithms implementation | Statement | D | Codeforces Round 853 (Div. 2) {1789} | PROGRAMMING | 1750.0 | Codeforces Round #853 (Div. 2) Editorial | |
| 18796 | Prefix and Suffix Array | constructive algorithms strings | Statement | A | Codeforces Round 856 (Div. 2) {1794} | PROGRAMMING | 750.0 | Codeforces Round 856 (Div. 2) Editorial | |
| 24423 | Li Hua and Pattern | constructive algorithms greedy | Statement | B | Codeforces Round 864 (Div. 2) {1797} | PROGRAMMING | 1000.0 | Codeforces Round 864 (Div. 2) Editorial | |
| 6910 | Double Lexicographically Minimum | constructive algorithms greedy implementation strings | Statement | C | Codeforces Round 854 by cybercats (Div. 1 + Div. 2) {1799} | PROGRAMMING | 1500.0 | Codeforces Round #854 Editorial | |
| 8623 | Umka and a Long Flight | constructive algorithms implementation math | Statement | D | Codeforces Round 863 (Div. 3) {1811} | PROGRAMMING | 114788 | ||
| 4300 | Unique Palindromes | binary search constructive algorithms greedy math strings | Statement | D | Codeforces Round 868 (Div. 2) {1823} | PROGRAMMING | 2000.0 | 115465 | |
| 556 | Bus Routes | binary search constructive algorithms dfs and similar greedy trees | Statement | E | Codeforces Round 873 (Div. 1) {1827} | PROGRAMMING | 2500.0 | Codeforces Round #873 (Div. 1 & 2) Editorial | 3400 |
| 24539 | Best Binary String | constructive algorithms greedy | Statement | C | Educational Codeforces Round 149 (Rated for Div. 2) {1837} | PROGRAMMING | 116752 | ||
| 3691 | Bracket Walk | constructive algorithms data structures implementation sortings strings | Statement | D | Codeforces Round 877 (Div. 2) {1838} | PROGRAMMING | 1750.0 | Codeforces Round #877 (Div. 2) Editorial | |
| 2151 | Great Grids | constructive algorithms dfs and similar dsu graphs math | Statement | E | Codeforces Round 884 (Div. 1 + Div. 2) {1844} | PROGRAMMING | 2000.0 | Codeforces Round #884 (Div. 1 + Div. 2) Editorial | |
| 13810 | Row Major | constructive algorithms math number theory strings | Statement | D | Codeforces Round 884 (Div. 1 + Div. 2) {1844} | PROGRAMMING | 1500.0 | Codeforces Round #884 (Div. 1 + Div. 2) Editorial | |
| 27370 | Good Arrays | constructive algorithms implementation math | Statement | B | Codeforces Round 890 (Div. 2) supported by Constructor Institute {1856} | PROGRAMMING | 750.0 | Codeforces Round #890 (Div. 2) Editorial | |
| 23528 | Not a Substring | constructive algorithms dp strings | Statement | A | Educational Codeforces Round 153 (Rated for Div. 2) {1860} | PROGRAMMING | Educational Codeforces Round 153 Editorial | ||
| 23970 | Two Binary Strings | constructive algorithms dfs and similar greedy | Statement | B | Educational Codeforces Round 154 (Rated for Div. 2) {1861} | PROGRAMMING | Educational Codeforces Round 154 Editorial | ||
| 3035 | Guess Game | bitmasks combinatorics constructive algorithms data structures games math probabilities strings trees | Statement | E | Harbour.Space Scholarship Contest 2023-2024 (Div. 1 + Div. 2) {1864} | PROGRAMMING | 2000.0 | Harbour.Space Scholarship Contest 2023-2024 (Div. 1 + Div. 2) Editorial | |
| 18611 | XOR Palindromes | bitmasks constructive algorithms strings | Statement | B | Codeforces Round 897 (Div. 2) {1867} | PROGRAMMING | 1000.0 | ||
| 6863 | Cyclic Operations | constructive algorithms dfs and similar graphs greedy implementation | Statement | D | Codeforces Round 897 (Div. 2) {1867} | PROGRAMMING | 2000.0 | ||
| 2739 | Candy Party (Hard Version) | bitmasks constructive algorithms dp graphs greedy implementation math | Statement | B2 | Codeforces Round 896 (Div. 1) {1868} | PROGRAMMING | 750.0 | Codeforces Round 896 (Div. 1, Div. 2) Editorial | |
| 8299 | Candy Party (Easy Version) | bitmasks constructive algorithms graphs greedy implementation math | Statement | B1 | Codeforces Round 896 (Div. 1) {1868} | PROGRAMMING | 500.0 | Codeforces Round 896 (Div. 1, Div. 2) Editorial | |
| 16463 | Decreasing String | constructive algorithms strings | Statement | C | Educational Codeforces Round 156 (Rated for Div. 2) {1886} | PROGRAMMING | Educational Codeforces Round 156 Editorial | ||
| 15269 | Qingshan Loves Strings 2 | constructive algorithms greedy | Statement | A | Codeforces Round 906 (Div. 1) {1889} | PROGRAMMING | 750.0 | Codeforces Round 906 Editorial | |
| 11571 | Matching Arrays | binary search constructive algorithms greedy sortings | Statement | C | CodeTON Round 7 (Div. 1 + Div. 2, Rated, Prizes!) {1896} | PROGRAMMING | 1500.0 | CodeTON Round 7 (Div. 1 + Div. 2, Rated, Prizes!) Editorial | |
| 14805 | StORage room | bitmasks brute force constructive algorithms greedy | Statement | B | Codeforces Round 912 (Div. 2) {1903} | PROGRAMMING | 1000.0 | Codeforces Round #912 (Div. 2) Editorial | |
| 5666 | Set To Max (Hard Version) | binary search constructive algorithms data structures dsu greedy implementation sortings two pointers | Statement | D2 | Codeforces Round 914 (Div. 2) {1904} | PROGRAMMING | 750.0 | Codeforces Round 914 (Div. 2) Editorial | |
| 8586 | Set To Max (Easy Version) | brute force constructive algorithms greedy | Statement | D1 | Codeforces Round 914 (Div. 2) {1904} | PROGRAMMING | 1250.0 | Codeforces Round 914 (Div. 2) Editorial | |
| 23083 | Removal of Unattractive Pairs | constructive algorithms greedy math strings | Statement | C | Codeforces Round 913 (Div. 3) {1907} | PROGRAMMING | Codeforces Round 913 (Div. 3) Editorial | ||
| 9745 | Mathematical Problem | brute force constructive algorithms implementation math strings | Statement | D | Good Bye 2023 {1916} | PROGRAMMING | 1500.0 | ||
| 28259 | 2023 | constructive algorithms implementation math number theory | Statement | A | Good Bye 2023 {1916} | PROGRAMMING | 250.0 | ||
| 28784 | Tricky Template | constructive algorithms implementation strings | Statement | A | Educational Codeforces Round 161 (Rated for Div. 2) {1922} | PROGRAMMING | Educational Codeforces Round 161 Editorial | ||
| 18401 | Find B | constructive algorithms data structures greedy | Statement | C | Educational Codeforces Round 162 (Rated for Div. 2) {1923} | PROGRAMMING | Educational Codeforces Round 162 Editorial | ||
| 16681 | Did We Get Everything Covered? | constructive algorithms dp greedy strings | Statement | A | Codeforces Round 921 (Div. 1) {1924} | PROGRAMMING | 500.0 | Codeforces Round 921 (Div. 1, Div. 2) Editorial | |
| 31114 | We Got Everything Covered! | constructive algorithms greedy strings | Statement | A | Codeforces Round 921 (Div. 2) {1925} | PROGRAMMING | 500.0 | Codeforces Round 921 (Div. 1, Div. 2) Editorial | |
| 37987 | Following the String | constructive algorithms greedy strings | Statement | B | Codeforces Round 923 (Div. 3) {1927} | PROGRAMMING | 125597 | ||
| 2088 | Modular Sequence | constructive algorithms dp greedy implementation math number theory | Statement | E | Codeforces Round 924 (Div. 2) {1928} | PROGRAMMING | 2250.0 | Codeforces Round 924 Editorial | |
| 24396 | Rectangle Cutting | constructive algorithms geometry greedy math | Statement | A | Codeforces Round 924 (Div. 2) {1928} | PROGRAMMING | 500.0 | Codeforces Round 924 Editorial | |
| 23455 | Turtle Tenacity: Continual Mods | constructive algorithms greedy number theory sortings | Statement | D | Codeforces Round 929 (Div. 3) {1933} | PROGRAMMING | Codeforces Round 929 (Div. 3) Editorial | ||
| 30293 | Entertainment in MAC | constructive algorithms strings | Statement | A | Codeforces Round 932 (Div. 2) {1935} | PROGRAMMING | 500.0 | Codeforces Round #932 (Div. 2) Editorial | |
| 4466 | No Palindromes | brute force constructive algorithms greedy hashing implementation strings | Statement | E | Codeforces Global Round 25 {1951} | PROGRAMMING | 2250.0 | Codeforces Global Round 25 Editorial | |
| 32211 | Progressive Square | constructive algorithms data structures implementation sortings | Statement | B | Codeforces Round 938 (Div. 3) {1955} | PROGRAMMING | 128243 | ||
| 2344 | Folding Strip | constructive algorithms greedy strings | Statement | C | Codeforces Round 941 (Div. 1) {1965} | PROGRAMMING | 1500.0 | Codeforces Round #941 (Div. 1, Div. 2) Editorial | 2300 |
| 17174 | Rectangle Filling | constructive algorithms implementation | Statement | B | Codeforces Round 941 (Div. 2) {1966} | PROGRAMMING | 1000.0 | Codeforces Round #941 (Div. 1, Div. 2) Editorial | 1100 |
| 22285 | Shifts and Sorting | constructive algorithms greedy | Statement | B | Educational Codeforces Round 165 (Rated for Div. 2) {1969} | PROGRAMMING | Educational Codeforces Round 165 Editorial | 1000 | |
| 937 | Arithmancy (Easy) | brute force constructive algorithms interactive strings | Statement | D1 | Helvetic Coding Contest 2024 online mirror (teams allowed, unrated) {1970} | PROGRAMMING | Helvetic Coding Contest 2024 Editorial | 2100 | |
| 308 | Arithmancy (Medium) | constructive algorithms interactive probabilities strings | Statement | D2 | Helvetic Coding Contest 2024 online mirror (teams allowed, unrated) {1970} | PROGRAMMING | Helvetic Coding Contest 2024 Editorial | 2600 | |
| 17750 | Manhattan Permutations | constructive algorithms greedy implementation math | Statement | C | Codeforces Round 953 (Div. 2) {1978} | PROGRAMMING | 1250.0 | 130527 | |
| 7833 | Fixing a Binary String | bitmasks brute force constructive algorithms greedy hashing strings | Statement | D | Codeforces Round 951 (Div. 2) {1979} | PROGRAMMING | 2000.0 | Codeforces Round 951 (Div. 2) Editorial | |
| 12961 | Permutation of Rows and Columns | constructive algorithms data structures hashing math matrices sortings | Statement | E | Codeforces Round 950 (Div. 3) {1980} | PROGRAMMING | 130135 | ||
| 11001 | Swap Dilemma | constructive algorithms divide and conquer greedy math sortings | Statement | D | Codeforces Round 956 (Div. 2) and ByteRace 2024 {1983} | PROGRAMMING | 1750.0 | ||
| 18365 | Corner Twist | constructive algorithms greedy implementation math | Statement | B | Codeforces Round 956 (Div. 2) and ByteRace 2024 {1983} | PROGRAMMING | 1000.0 | ||
| 20911 | Large Addition | constructive algorithms implementation math | Statement | B | Codeforces Global Round 26 {1984} | PROGRAMMING | 750.0 | Codeforces Global Round 26 Editorial | |
| 10727 | Novice's Mistake | brute force constructive algorithms math strings | Statement | E | Codeforces Round 957 (Div. 3) {1992} | PROGRAMMING | Shayan's Video Tutorial | ||
| 19429 | Fun Game | bitmasks constructive algorithms greedy math | Statement | B | Codeforces Round 959 sponsored by NEAR (Div. 1 + Div. 2) {1994} | PROGRAMMING | 1000.0 | Video Tutorial | |
| 1523 | Stardew Valley | constructive algorithms dfs and similar graphs | Statement | F | Codeforces Round 959 sponsored by NEAR (Div. 1 + Div. 2) {1994} | PROGRAMMING | 2500.0 | Video Tutorial | |
| 7349 | Funny Game | constructive algorithms dsu graphs greedy math number theory | Statement | D | Codeforces Round 959 sponsored by NEAR (Div. 1 + Div. 2) {1994} | PROGRAMMING | 2000.0 | Video Tutorial | |
| 17655 | Black Circles | brute force constructive algorithms geometry greedy math | Statement | C | EPIC Institute of Technology Round August 2024 (Div. 1 + Div. 2) {2002} | PROGRAMMING | 1000.0 | EPIC Institute of Technology Round August 2024 (Div. 1 + Div. 2) Editorial | |
| 21589 | Turtle and Good Pairs | constructive algorithms greedy strings | Statement | C | Codeforces Round 968 (Div. 2) {2003} | PROGRAMMING | 1000.0 | sol-zh.pdf | |
| 41681 | Sakurako's Exam | brute force constructive algorithms greedy math | Statement | A | Codeforces Round 970 (Div. 3) {2008} | PROGRAMMING | Codeforces Round 970 (Div. 3) Editorial | ||
| 14481 | Password Cracking | brute force constructive algorithms interactive strings | Statement | C | Codeforces Round 973 (Div. 2) {2013} | PROGRAMMING | 1250.0 | 134298 | |
| 1369 | C+K+S | brute force constructive algorithms dfs and similar graphs greedy hashing math strings | Statement | C | Codeforces Round 980 (Div. 1) {2023} | PROGRAMMING | 1500.0 | 135341 | |
| 848 | Palindrome Everywhere | constructive algorithms greedy | Statement | F | Refact.ai Match 1 (Codeforces Round 985) {2029} | PROGRAMMING | 3000.0 | Refact.ai Match 1 (Codeforces Round 985) Editorial | |
| 2015 | Permutations Harmony | brute force combinatorics constructive algorithms greedy hashing implementation math | Statement | E | Rayan Programming Contest 2024 - Selection (Codeforces Round 989, Div. 1 + Div. 2) {2034} | PROGRAMMING | 2000.0 | Rayan 2024 Selection Round Editorial | |
| 17241 | Shohag Loves Strings | constructive algorithms greedy implementation strings | Statement | B | CodeTON Round 9 (Div. 1 + Div. 2, Rated, Prizes!) {2039} | PROGRAMMING | 1000.0 | Editorial of CodeTON Round 9 (Div. 1 + Div. 2) | |
| 3478 | Kevin and Bipartite Graph | constructive algorithms graphs greedy | Statement | E | Codeforces Global Round 28 {2048} | PROGRAMMING | 1750.0 | Tutorial | |
| 18867 | pspspsps | brute force constructive algorithms implementation | Statement | B | Codeforces Round 994 (Div. 2) {2049} | PROGRAMMING | 750.0 | Codeforces Round #994 (Div. 2) Editorial | |
| 33516 | Two Frogs | constructive algorithms games greedy | Statement | A | Codeforces Round 996 (Div. 2) {2055} | PROGRAMMING | 500.0 | Codeforces Round 996 (Div. 2) Editorial | |
| 55215 | Skibidus and Amog'u | brute force constructive algorithms implementation strings | Statement | A | Codeforces Round 1003 (Div. 4) {2065} | PROGRAMMING | Video Tutorial | ||
| 11900 | Skibidus and Rizz | constructive algorithms greedy | Statement | E | Codeforces Round 1003 (Div. 4) {2065} | PROGRAMMING | Video Tutorial | ||
| 1893 | A, B, AB and BA | constructive algorithms greedy sortings strings | Statement | E | Educational Codeforces Round 174 (Rated for Div. 2) {2069} | PROGRAMMING | 139774 | ||
| 30865 | Having Been a Treasurer in the Past, I Help Goblins Deceive | combinatorics constructive algorithms strings | Statement | B | Codeforces Round 1006 (Div. 3) {2072} | PROGRAMMING | Codeforces Round 1006 (Div. 3) Editorial | ||
| 23380 | Serval and String Theory | constructive algorithms implementation | Statement | A | Codeforces Round 1011 (Div. 2) {2085} | PROGRAMMING | 500.0 | Codeforces Round #1011 (Div. 2) Editorial | |
| 6827 | Mishkin Energizer | brute force constructive algorithms greedy implementation strings | Statement | D | Codeforces Round 1014 (Div. 2) {2092} | PROGRAMMING | 1750.0 | Codeforces Round #1014 (Div. 2) Editorial | |
| 428 | Andryusha and CCB | brute force constructive algorithms greedy math number theory strings | Statement | F | Codeforces Round 1014 (Div. 2) {2092} | PROGRAMMING | 3000.0 | Codeforces Round #1014 (Div. 2) Editorial | |
| 21339 | Dinner Time | constructive algorithms math | Statement | A | Codeforces Round 1024 (Div. 2) {2102} | PROGRAMMING | 250.0 | 142788 | |
| 32415 | Above the Clouds | constructive algorithms greedy strings | Statement | B | Codeforces Round 1032 (Div. 3) {2121} | PROGRAMMING | Codeforces Round 1032 (Div. 3) Editorial | ||
| 19144 | Greedy Grid | constructive algorithms greedy | Statement | A | Order Capital Round 1 (Codeforces Round 1038, Div. 1 + Div. 2) {2122} | PROGRAMMING | 500.0 | Order Capital Round 1 (Codeforces Round 1038, Div. 1 + Div. 2) Editorial | |
| 21739 | Binary String Battle | constructive algorithms games greedy | Statement | D | Codeforces Round 1034 (Div. 3) {2123} | PROGRAMMING | Codeforces Round 1034 (Div. 3) Editorial | ||
| 19133 | Deranged Deletions | constructive algorithms sortings | Statement | A | EPIC Institute of Technology Round Summer 2025 (Codeforces Round 1036, Div. 1 + Div. 2) {2124} | PROGRAMMING | 500.0 | EPIC Institute of Technology Round Summer 2025 (Codeforces Round 1036, Div. 1 + Div. 2) Editorial | |
| 27869 | Difficult Contest | constructive algorithms implementation sortings strings | Statement | A | Educational Codeforces Round 181 (Rated for Div. 2) {2125} | PROGRAMMING | Educational Codeforces Round 181 Editorial | ||
| 19570 | Mix Mex Max | constructive algorithms greedy math | Statement | A | Atto Round 1 (Codeforces Round 1041, Div. 1 + Div. 2) {2127} | PROGRAMMING | 500.0 | Atto Round 1 (Codeforces Round 1041, Div. 1 + Div. 2) Editorial | |
| 1655 | Interactive RBS (Hard Version) | binary search bitmasks constructive algorithms dp interactive | Statement | C3 | Codeforces Round 1040 (Div. 1) {2129} | PROGRAMMING | 750.0 | Codeforces Round 1040 (Div. 1, Div. 2) Editorial | |
| 3835 | Interactive RBS (Easy Version) | binary search bitmasks constructive algorithms interactive | Statement | C1 | Codeforces Round 1040 (Div. 1) {2129} | PROGRAMMING | 750.0 | Codeforces Round 1040 (Div. 1, Div. 2) Editorial | |
| 2485 | Interactive RBS (Medium Version) | binary search bitmasks constructive algorithms interactive | Statement | C2 | Codeforces Round 1040 (Div. 1) {2129} | PROGRAMMING | 750.0 | Codeforces Round 1040 (Div. 1, Div. 2) Editorial | |
| 26457 | Painting With Two Colors | constructive algorithms implementation math | Statement | A | Codeforces Round 1045 (Div. 2) {2134} | PROGRAMMING | 500.0 | 145832 | |
| 1878 | Make Good | constructive algorithms math strings | Statement | E | Codeforces Round 1051 (Div. 2) {2143} | PROGRAMMING | 2500.0 | Codeforces Round 1051 (Div. 2) Editorial | |
| 909 | Bracket Groups | constructive algorithms dp strings | Statement | F | Educational Codeforces Round 182 (Rated for Div. 2) {2144} | PROGRAMMING | Educational Codeforces Round 182 Editorial | ||
| 16873 | Abraham's Great Escape | constructive algorithms graphs | Statement | B | Codeforces Round 1056 (Div. 2) {2155} | PROGRAMMING | 1000.0 | Codeforces Round 1056 (Div. 2) Editorial | |
| 3246 | Palindrome Flipping | brute force constructive algorithms implementation strings | Statement | D | Codeforces Round 1067 (Div. 2) {2158} | PROGRAMMING | 2000.0 | Codeforces Round 1067 (Div. 2) Editorial | |
| 7038 | Rae Taylor and Trees (hard version) | binary search constructive algorithms data structures dp dsu implementation trees | Statement | F | Codeforces Round 1065 (Div. 3) {2171} | PROGRAMMING | Codeforces Round 1065 (Div. 3) Editorial | ||
| 5719 | Blackslex and Girls | constructive algorithms geometry math | Statement | E | Codeforces Round 1071 (Div. 3) {2179} | PROGRAMMING | Codeforces Round 1071 (Div. 3) Editorial | ||
| 10510 | Sub-RBS (Easy Version) | combinatorics constructive algorithms dp greedy strings two pointers | Statement | B1 | Codeforces Round 1073 (Div. 1) {2190} | PROGRAMMING | 750.0 | Codeforces Round 1073 (Div. 1, Div. 2) Editorial | |
| 19690 | MEX Reordering | constructive algorithms sortings | Statement | B | Codeforces Round 1073 (Div. 2) {2191} | PROGRAMMING | 1000.0 | Codeforces Round 1073 (Div. 1, Div. 2) Editorial | |
| 2002 | Swap to Rearrange | constructive algorithms dfs and similar graph matchings graphs greedy strings | Statement | E | Codeforces Round 1081 (Div. 2) {2192} | PROGRAMMING | 2250.0 | Codeforces Round 1081 (Div. 2) Editorial | |
| 14261 | Flipping Binary String | constructive algorithms strings | Statement | B | Codeforces Round 1081 (Div. 2) {2192} | PROGRAMMING | 1000.0 | Codeforces Round 1081 (Div. 2) Editorial | |
| 1598 | N-MEX (Constructive Version) | constructive algorithms greedy | Statement | E1 | Codeforces Round 1085 (Div. 1 + Div. 2) {2207} | PROGRAMMING | 1750.0 | Codeforces Round 1085 (Div. 1 + Div. 2) Editorial | |
| 19477 | Bingo Candies | constructive algorithms math | Statement | A | Codeforces Round 1086 (Div. 2) {2208} | PROGRAMMING | 500.0 | Tutorial | |
| 297 | Binary Strings are Simple? | constructive algorithms dsu interactive number theory | Statement | E | Codeforces Round 1089 (Div. 2) {2210} | PROGRAMMING | 2750.0 | Codeforces Round 1089 (Div. 2) Editorial | |
| 1906 | A Simple RBS Problem | constructive algorithms strings trees | Statement | D | Codeforces Round 1089 (Div. 2) {2210} | PROGRAMMING | 2250.0 | Codeforces Round 1089 (Div. 2) Editorial |