Codeforces problemset search & solutions
Exclude tags.

Review the problem statement from Codeforces (link will open a new tab). When you've matched your problem, go to the solutions.

Search on plain tags, ratings, names, and problem text. Example: brute force or binary search

1 2 >

Solved
Name
Tags
Solutions
Index
Contest
Type
Points
Tutorial
Rating Level
730 Writing a Song brute force dp strings Statement D Codeforces Beta Round 50 {54} PROGRAMMING Codeforces Beta Round #50: Editorial for problem E 2100
181 Ali goes shopping *special brute force strings Statement E Unknown Language Round 2 {72} PROGRAMMING 1900
468 Azembler brute force implementation Statement C Codeforces Beta Round 76 (Div. 1 Only) {93} PROGRAMMING Codeforces Beta Round 76 - задача Е div 1 глазами ее автора. 2400
3329 Petr# brute force data structures hashing strings Statement B Codeforces Beta Round 86 (Div. 1 Only) {113} PROGRAMMING Codeforces Beta Round #86 Editorial 1900
4310 PFAST Inc. bitmasks brute force graphs Statement B Codeforces Beta Round 86 (Div. 2 Only) {114} PROGRAMMING Codeforces Beta Round #86 Editorial 1500
1748 Very Interesting Game brute force number theory Statement B Codeforces Beta Round 88 {117} PROGRAMMING Неофициальный разбор Codeforces Beta Round #88 1700
2894 Fancy Number brute force greedy sortings strings Statement C Codeforces Beta Round 89 (Div. 2) {118} PROGRAMMING Editorial codeforces beta raund 89. 1700
13345 Lucky Substring brute force implementation Statement B Codeforces Beta Round 91 (Div. 2 Only) {122} PROGRAMMING BIT solution for Codeforces #91 E 1100
2914 String brute force constructive algorithms hashing implementation string suffix structures strings Statement B Codeforces Beta Round 94 (Div. 1 Only) {128} PROGRAMMING 3219 2200
209 Hellish Constraints brute force dp two pointers Statement E Codeforces Beta Round 99 (Div. 1) {138} PROGRAMMING Codeforces Beta Round #99: editorial 2900
3224 String Manipulation 1.0 *special binary search brute force data structures strings Statement C VK Cup 2012 Qualification Round 2 {159} PROGRAMMING Simple solution to vk cup Qualification Round 1 and 2 2000
4710 Palindrome pairs *special brute force dp strings Statement D VK Cup 2012 Qualification Round 2 {159} PROGRAMMING Simple solution to vk cup Qualification Round 1 and 2 2000
14004 Another Problem on Strings binary search brute force dp math strings two pointers Statement C Codeforces Round 112 (Div. 2) {165} PROGRAMMING Codeforces Round #112 (Div. 2) Tutorial 1600
8217 Phone Code *special brute force implementation Statement A Croc Champ 2012 - Qualification Round {172} PROGRAMMING 1600
9349 Common Divisors brute force hashing implementation math strings Statement D Codeforces Round 117 (Div. 2) {182} PROGRAMMING Codeforces Round #117 (Div. 2) Разбор Задач 1400
20000 LLPS binary search bitmasks brute force greedy implementation strings Statement A Codeforces Round 127 (Div. 2) {202} PROGRAMMING 900
288125 Boy or Girl brute force implementation strings Statement A Codeforces Round 146 (Div. 2) {236} PROGRAMMING Codeforces Round #146 Tutorial 800
993 Log Stream Analysis binary search brute force implementation strings Statement F CROC-MBTU 2012, Elimination Round (ACM-ICPC) {245} PROGRAMMING КРОК-МВТУ 2012, Отборочный раунд (Разбор) 2000
10133 Little Elephant and Chess brute force strings Statement A Codeforces Round 157 (Div. 2) {259} PROGRAMMING Codeforces Round #157 — Editorial 1100
4102 Ancient Prophesy brute force implementation strings Statement B Codeforces Round 158 (Div. 2) {260} PROGRAMMING Codeforces Round #158 (Div. 2) Tutorial 1600
3647 New Problem brute force strings Statement B Codeforces Round 170 (Div. 2) {278} PROGRAMMING Codeforces Round #170 Tutorial 1500
401 Shaass and Painter Robot brute force implementation number theory Statement D Codeforces Round 178 (Div. 2) {294} PROGRAMMING Codeforces Round #178 Editorial 2700
3912 Dima and Text Messages brute force strings Statement B Codeforces Round 208 (Div. 2) {358} PROGRAMMING Codeforces Round #208 (Div. 2) Разбор 1500
864 Dima and Magic Guitar brute force implementation math Statement E Codeforces Round 214 (Div. 2) {366} PROGRAMMING Codeforces Round #214 (Div. 2) — Tutorial 2300
1681 New Year Letter bitmasks brute force dp Statement D Good Bye 2013 {379} PROGRAMMING Tutorial Good Bye 2013 2000
10927 Bear and Strings brute force greedy implementation math strings Statement B Codeforces Round 226 (Div. 2) {385} PROGRAMMING Codeforces Round #226 (Div. 2) — Editorial 1300
4294 Kolya and Tandem Repeat brute force implementation strings Statement B Codeforces Round 253 (Div. 2) {443} PROGRAMMING Codeforces #253 editorial 1500
8568 Eevee brute force implementation strings Statement A MemSQL Start[c]UP 2.0 - Round 1 {452} PROGRAMMING MemSQL Start[c]UP 2.0 Round 1 and 2 Editorials 1200
37831 Dreamoon and WiFi bitmasks brute force combinatorics dp math probabilities Statement B Codeforces Round 272 (Div. 2) {476} PROGRAMMING 1300
9519 Hacking Cypher brute force math number theory strings Statement C Codeforces Round 279 (Div. 2) {490} PROGRAMMING Codeforces Round #279 (Div. 2) Editorial 1700
8181 Removing Columns brute force constructive algorithms implementation Statement C Codeforces Round 283 (Div. 2) {496} PROGRAMMING 15208 1600
6957 Mr. Kitayuta's Gift brute force implementation strings Statement A Codeforces Round 286 (Div. 2) {505} PROGRAMMING Tutorial 1200
2963 Fuzzy Search bitmasks brute force fft Statement D Codeforces Round 296 (Div. 1) {528} PROGRAMMING Codeforces Round #296 Editorial 2500
10359 Mike and Fax brute force implementation strings Statement A Codeforces Round 305 (Div. 2) {548} PROGRAMMING Codeforces Round #305 Editorial 1200
44271 Two Substrings brute force dp greedy implementation strings Statement A Codeforces Round 306 (Div. 2) {550} PROGRAMMING Разбор задач Codeforces Round #306 (Div. 2) 1500
4069 ZgukistringZ brute force constructive algorithms implementation strings Statement B Codeforces Round 307 (Div. 2) {551} PROGRAMMING Tutorial 1800
1762 Vanya and Brackets brute force dp expression parsing greedy implementation strings Statement E Codeforces Round 308 (Div. 2) {552} PROGRAMMING Codeforces #308 (Div. 2) Editorial 2300
11058 Ohana Cleans Up brute force greedy strings Statement B Codeforces Round 309 (Div. 2) {554} PROGRAMMING Codeforces Round #309 Editorial 1200
14622 Kyoya and Photobooks brute force math strings Statement A Codeforces Round 309 (Div. 2) {554} PROGRAMMING Codeforces Round #309 Editorial 900
7899 The Text Splitting brute force implementation strings Statement A Educational Codeforces Round 4 {612} PROGRAMMING 22299 1300
6746 Robot Sequence brute force implementation Statement A 8VC Venture Cup 2016 - Elimination Round {626} PROGRAMMING 23522 1000
5379 Bear and Compressing brute force dfs and similar dp strings Statement B IndiaHacks 2016 - Online Edition (Div. 1 + Div. 2) {653} PROGRAMMING IndiaHacks Finals 2016 — Editorial 1300
936 Restore a Number brute force constructive algorithms strings Statement F Codeforces Round 350 (Div. 2) {670} PROGRAMMING Codeforces Round #350 (Div.2) Editorial 2200
6029 Barnicle brute force implementation math strings Statement B Codeforces Round 362 (Div. 2) {697} PROGRAMMING 1400
2602 String Set Queries brute force data structures hashing string suffix structures strings Statement F Educational Codeforces Round 16 {710} PROGRAMMING Editorial of Educational Codeforces Round 16 2700
2952 Hidden Word brute force constructive algorithms implementation strings Statement C Canada Cup 2016 {725} PROGRAMMING Canada Cup Editorial 1600
1118 Vladik and chat brute force constructive algorithms dp implementation strings Statement C Codeforces Round 390 (Div. 2) {754} PROGRAMMING 2200
591 Dasha and cyclic table bitmasks brute force fft strings trees Statement E Codeforces Round 390 (Div. 2) {754} PROGRAMMING 2800
6049 Dasha and Password brute force dp implementation Statement C Codeforces Round 394 (Div. 2) {761} PROGRAMMING Codeforces Round #394 (Div. 2) [Editorial] 1600
717 Dasha and Photos brute force data structures dp implementation Statement F Codeforces Round 394 (Div. 2) {761} PROGRAMMING Codeforces Round #394 (Div. 2) [Editorial] 2900
4963 Mahmoud and a Message brute force dp greedy strings Statement C Codeforces Round 396 (Div. 2) {766} PROGRAMMING Codeforces round #396 editorial 1700
12948 A Serial Killer brute force implementation strings Statement A ICM Technex 2017 and Codeforces Round 400 (Div. 1 + Div. 2, combined) {776} PROGRAMMING ICM Technex 2017 and Codeforces Round #400 (Div. 1 + Div. 2, combined) Editorial 900
2547 Bitwise Formula bitmasks brute force dfs and similar expression parsing implementation Statement B Codeforces Round 402 (Div. 1) {778} PROGRAMMING Codeforces Round #402, Editorial 2000
1011 Peterson Polyglot brute force dfs and similar dsu hashing strings trees Statement C Codeforces Round 402 (Div. 1) {778} PROGRAMMING Codeforces Round #402, Editorial 2600
24077 Mike and palindrome brute force constructive algorithms strings Statement A Codeforces Round 410 (Div. 2) {798} PROGRAMMING Codeforces Round #410 (Div. 2) Editorial 1100
9320 Mike and strings brute force dp strings Statement B Codeforces Round 410 (Div. 2) {798} PROGRAMMING Codeforces Round #410 (Div. 2) Editorial 1300
7925 An impassioned circulation of affection brute force dp strings two pointers Statement C Codeforces Round 418 (Div. 2) {814} PROGRAMMING Codeforces Round #418 (Div. 2) Editorial 1600
10303 Crossword solving brute force implementation strings Statement B Codeforces Round 422 (Div. 2) {822} PROGRAMMING Codeforces Round #422 (Div. 2) Editorial 1100
4790 Palindromic characteristics brute force dp hashing strings Statement D Codeforces Round 427 (Div. 2) {835} PROGRAMMING Editorial 1900
28063 Tom Riddle's Diary brute force implementation strings Statement A Manthan, Codefest 17 {855} PROGRAMMING 54750 700
11045 Quasi-palindrome brute force implementation Statement A Educational Codeforces Round 29 {863} PROGRAMMING Editorial 900
10055 Polycarp and Letters brute force implementation strings Statement B Codeforces Round 436 (Div. 2) {864} PROGRAMMING Codeforces Round #436 (Div.2) Разбор 1100
162 Hex Dyslexia bitmasks brute force dp graphs Statement E MemSQL Start[c]UP 3.0 - Round 2 (onsite finalists) {865} PROGRAMMING MemSQL Start[c]UP 3.0 Round 2 Editorial 2700
10103 Bark to Unlock brute force implementation strings Statement A Codeforces Round 438 by Sberbank and Barcelona Bootcamp (Div. 1 + Div. 2 combined) {868} PROGRAMMING 55046 1000
1024 Huge Strings bitmasks brute force dp implementation strings Statement D Codeforces Round 438 by Sberbank and Barcelona Bootcamp (Div. 1 + Div. 2 combined) {868} PROGRAMMING 55046 2100
12108 Nikita and string brute force dp Statement B Codeforces Round 442 (Div. 2) {877} PROGRAMMING 55362 1500
1800 Palindromic Cut brute force implementation strings Statement H 2017-2018 ACM-ICPC, NEERC, Southern Subregional Contest (Online Mirror, ACM-ICPC Rules, Teams Preferred) {883} PROGRAMMING 1800
1624 Swapping Characters brute force hashing implementation strings Statement E Educational Codeforces Round 34 (Rated for Div. 2) {903} PROGRAMMING Educational Codeforces Round 34 Editorial 2200
10433 Generate Login brute force greedy sortings Statement A Codeforces Round 455 (Div. 2) {909} PROGRAMMING Codeforces Round #455 (Div. 2) Editorial 1100
2477 Substrings in a String bitmasks brute force data structures string suffix structures strings Statement F Codecraft-18 and Codeforces Round 458 (Div. 1 + Div. 2, combined) {914} PROGRAMMING Tutorial 2900
609 Scissors brute force strings Statement D Codeforces Round 471 (Div. 2) {955} PROGRAMMING Editorial 2700
2233 Kuro and GCD and XOR and SUM binary search bitmasks brute force data structures dp dsu greedy math number theory strings trees Statement D Codeforces Round 482 (Div. 2) {979} PROGRAMMING 1750.0 Codeforces Round #482 (Div. 2) Editorial 2200
10396 Antipalindrome brute force implementation strings Statement A Avito Code Challenge 2018 {981} PROGRAMMING 59713 1000
27717 Delete from the Left brute force implementation strings Statement B Codeforces Round 496 (Div. 3) {1005} PROGRAMMING Codeforces Round 496 (Div. 3): Problem Tutorials 1000
10201 Segment Occurrences brute force implementation Statement B Educational Codeforces Round 48 (Rated for Div. 2) {1016} PROGRAMMING Разбор Educational Codeforces Round 48 1300
4018 The Wu bitmasks brute force data structures Statement D Codeforces Round 502 (in memory of Leopoldo Taravilse, Div. 1 + Div. 2) {1017} PROGRAMMING Разбор (англ.) 1900
9353 Single Wildcard Pattern Matching brute force implementation strings Statement A Codeforces Round 504 (rated, Div. 1 + Div. 2, based on VK Cup 2018 Final) {1023} PROGRAMMING Codeforces Round 504 Editorial 1300
19525 Vitamins bitmasks brute force dp implementation Statement B Codeforces Round 510 (Div. 2) {1042} PROGRAMMING Tutorial 1200
2887 Check Transcription brute force data structures hashing strings Statement E Mail.Ru Cup 2018 Round 3 {1056} PROGRAMMING Mail.Ru Cup 2018 Round 3 Editorial 2100
234 Mateusz and an Infinite Sequence bitmasks brute force dp strings Statement H Hello 2019 {1097} PROGRAMMING 64310 3000
44439 Gennady and a Card Game brute force implementation Statement A Hello 2019 {1097} PROGRAMMING 64310 600
10592 Zuhair and Strings brute force implementation strings Statement B Codeforces Round 533 (Div. 2) {1105} PROGRAMMING Tutorial 1200
4213 Circus brute force greedy math strings Statement B Codeforces Round 545 (Div. 2) {1138} PROGRAMMING Codeforces Round #545 – Editorial 1700
3122 Chladni Figure brute force strings Statement B Forethought Future Cup - Final Round (Onsite Finalists Only) {1147} PROGRAMMING Forethought Future Cup Final Round Tutorial 1900
11979 Maxim and Biology brute force strings Statement A Codeforces Round 553 (Div. 2) {1151} PROGRAMMING Codeforces Round #553 (Div. 2) Editorial 1000
20374 Telephone Number brute force greedy strings Statement A Educational Codeforces Round 65 (Rated for Div. 2) {1167} PROGRAMMING 67058 700
4545 Archaeology brute force constructive algorithms greedy strings Statement E Codeforces Global Round 4 {1178} PROGRAMMING E 1900
9889 Tokitsukaze and Mahjong brute force implementation Statement B Codeforces Round 573 (Div. 2) {1191} PROGRAMMING 68314 1200
9649 Compress Words brute force hashing implementation string suffix structures strings Statement E Codeforces Round 578 (Div. 2) {1200} PROGRAMMING Codeforces Round #578 (Div. 2) Editorial 2000
2793 You Are Given a WASD-string... brute force data structures dp greedy implementation math strings Statement C Educational Codeforces Round 70 (Rated for Div. 2) {1202} PROGRAMMING 68972 2100
2866 You Are Given Some Strings... brute force string suffix structures strings Statement E Educational Codeforces Round 70 (Rated for Div. 2) {1202} PROGRAMMING 68972 2500
3242 Kirk and a Binary String (easy version) brute force greedy strings Statement D1 Codeforces Round 581 (Div. 2) {1204} PROGRAMMING 69244 2000
5499 Two Small Strings brute force constructive algorithms Statement E Codeforces Round 582 (Div. 3) {1213} PROGRAMMING Codeforces Round #582 (Div. 3) Editorial 2000
18276 2048 Game brute force greedy math Statement A Educational Codeforces Round 73 (Rated for Div. 2) {1221} PROGRAMMING Разбор Educational Codeforces Round 73 1000
21702 Broken Keyboard brute force strings two pointers Statement A Educational Codeforces Round 75 (Rated for Div. 2) {1251} PROGRAMMING 70860 1000
18470 Shuffle Hashing brute force implementation strings Statement A Educational Codeforces Round 78 (Rated for Div. 2) {1278} PROGRAMMING Educational Codeforces Round 78 Editorial 1000
8711 Dr. Evil Underscores bitmasks brute force dfs and similar divide and conquer dp greedy strings trees Statement D Codeforces Round 613 (Div. 2) {1285} PROGRAMMING Codeforces Round #613 (Div. 2) Editorial 1800
1618 Madhouse (Easy version) brute force constructive algorithms interactive math Statement C1 Codeforces Round 612 (Div. 1) {1286} PROGRAMMING Codeforces Round #612 - Editorial 2400
767 Madhouse (Hard version) brute force constructive algorithms hashing interactive math Statement C2 Codeforces Round 612 (Div. 1) {1286} PROGRAMMING Codeforces Round #612 - Editorial 2900
3326 Erase Subsequences brute force dp greedy strings Statement E Educational Codeforces Round 82 (Rated for Div. 2) {1303} PROGRAMMING Educational Codeforces Round 82 2200
18854 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
12795 Cow and Message brute force dp math strings Statement C Codeforces Round 621 (Div. 1 + Div. 2) {1307} PROGRAMMING 1500.0 Codeforces Round #621 (Div. 1 + Div. 2) Editorial 1500
11815 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
1048 Wise Men (Easy Version) bitmasks brute force dp meet-in-the-middle Statement F1 Codeforces Global Round 7 {1326} PROGRAMMING 2000.0 74961 2600
606 Elementary! brute force dp strings Statement F April Fools Day Contest 2020 {1331} PROGRAMMING April Fools Day Contest 2020: editorial
440 Substring Search brute force fft Statement G Educational Codeforces Round 85 (Rated for Div. 2) {1334} PROGRAMMING Educational Codeforces Round 85 Editorial
13666 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
4893 Binary Median bitmasks brute force constructive algorithms Statement H Codeforces Round 644 (Div. 3) {1360} PROGRAMMING Codeforces Round #644 (Div. 3) Editorial 2100
21687 Codeforces Subsequences brute force constructive algorithms greedy math strings Statement B Codeforces Global Round 8 {1368} PROGRAMMING 1000.0 Codeforces Global Round 8: editorial
55142 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
12348 Acacius and String brute force implementation strings Statement A Codeforces Round 657 (Div. 2) {1379} PROGRAMMING 500.0 Codeforces Round #657 Editorial 1500
20752 Good String brute force dp greedy implementation two pointers Statement C Educational Codeforces Round 92 (Rated for Div. 2) {1389} PROGRAMMING 80809
28040 String Similarity brute force constructive algorithms strings Statement A Educational Codeforces Round 94 (Rated for Div. 2) {1400} PROGRAMMING 81942
2231 A Bit Similar bitmasks brute force hashing string suffix structures strings two pointers Statement E Educational Codeforces Round 101 (Rated for Div. 2) {1469} PROGRAMMING Educational Codeforces Round 101 Editorial
3320 New Year's Puzzle brute force dp graph matchings greedy sortings Statement F Codeforces Round 693 (Div. 3) {1472} PROGRAMMING Codeforces Round #693 (Div. 3) Editorial
35429 String LCM brute force math strings Statement B Educational Codeforces Round 102 (Rated for Div. 2) {1473} PROGRAMMING Educational Codeforces Round 102 Editorial
58254 New Year's Number brute force dp math Statement B Codeforces Round 697 (Div. 3) {1475} PROGRAMMING Codeforces Round #697 (Div. 3) Editorial
12492 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
39409 Sum of Cubes binary search brute force brute force math Statement C Codeforces Round 702 (Div. 3) {1490} PROGRAMMING Codeforces Round #702 (Div. 3) Editorial
4989 K-beautiful Strings binary search brute force greedy implementation strings Statement C Codeforces Round 705 (Div. 2) {1493} PROGRAMMING 1750.0 Codeforces Round #705 (Div.2) Editorial
15407 Berland Crossword binary search bitmasks brute force greedy implementation Statement B Educational Codeforces Round 105 (Rated for Div. 2) {1494} PROGRAMMING Educational Codeforces Round 105 Editorial
22978 ABC String bitmasks brute force implementation Statement A Educational Codeforces Round 105 (Rated for Div. 2) {1494} PROGRAMMING Educational Codeforces Round 105 Editorial
22382 Split it! brute force constructive algorithms greedy strings Statement A Codeforces Round 706 (Div. 2) {1496} PROGRAMMING 500.0 Codeforces Round #706 Editorial
22096 Binary Removals brute force dp greedy implementation Statement B Educational Codeforces Round 106 (Rated for Div. 2) {1499} PROGRAMMING Educational Codeforces Round 106 Editorial
4889 Maximize the Remaining String brute force data structures dp greedy strings two pointers Statement G Codeforces Round 710 (Div. 3) {1506} PROGRAMMING Editorial
37306 Double-ended Strings brute force dp hashing strings Statement C Codeforces Round 710 (Div. 3) {1506} PROGRAMMING Editorial
12544 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
59186 Do Not Be Distracted! brute force implementation Statement A Codeforces Round 719 (Div. 3) {1520} PROGRAMMING Editorial
2833 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
26105 Prinzessin der Verurteilung brute force strings Statement B Codeforces Round 724 (Div. 2) {1536} PROGRAMMING 1000.0 Codeforces Round #724 — Editorial 1200
16843 Erase and Extend (Easy Version) binary search brute force dp greedy hashing string suffix structures strings Statement E1 Codeforces Round 726 (Div. 2) {1537} PROGRAMMING 1250.0 Codeforces Round #726 (Div.2) Editorial
3264 Funny Substrings brute force data structures hashing implementation strings Statement E Codeforces Round 725 (Div. 3) {1538} PROGRAMMING Codeforces Round #725 (Div. 3) Editorial
15582 Reverse String brute force dp hashing strings Statement B Harbour.Space Scholarship Contest 2021-2022 (open for everyone, rated, Div. 1 + Div. 2) {1553} PROGRAMMING 500.0 Harbour.Space Scholarship Contest 2021-2022 (Div. 1 + Div. 2) Editorial
15951 Say No to Palindromes brute force dp strings Statement D Educational Codeforces Round 112 (Rated for Div. 2) {1555} PROGRAMMING 93389 1600
456 Palindromic Hamiltonian Path brute force dp graphs Statement F Educational Codeforces Round 113 (Rated for Div. 2) {1569} PROGRAMMING 94721
11724 Ticks brute force dp greedy implementation Statement C Codeforces Round 744 (Div. 3) {1579} PROGRAMMING Codeforces Round #744 (Div. 3) Editorial
29833 Make Them Equal brute force greedy math strings Statement C Codeforces Round 747 (Div. 2) {1594} PROGRAMMING 1500.0 95525 1200
19050 Dominant Character brute force implementation strings Statement C Codeforces Round 754 (Div. 2) {1605} PROGRAMMING 1500.0 tutorial 1400
9256 Menorah brute force graphs greedy math Statement C Codeforces Global Round 18 {1615} PROGRAMMING 1750.0 Global Round 18 Editorial
7318 BA-String bitmasks brute force dp greedy implementation math shortest paths Statement C Educational Codeforces Round 119 (Rated for Div. 2) {1620} PROGRAMMING 98061
4655 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
24701 Reverse and Concatenate brute force strings Statement A Codeforces Round 770 (Div. 2) {1634} PROGRAMMING 500.0 Codeforces Round #770 (Div. 2) editorial
3503 Expand the Path brute force combinatorics implementation math Statement E Educational Codeforces Round 123 (Rated for Div. 2) {1644} PROGRAMMING 100227
22848 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
17191 Madoka and the Elegant Gift brute force graphs implementation Statement B Codeforces Round 777 (Div. 2) {1647} PROGRAMMING 1250.0 Codeforces Round #777 Editorial
8010 Promising String (easy version) brute force implementation math strings Statement F1 Codeforces Round 780 (Div. 3) {1660} PROGRAMMING Codeforces Round #780 (Div. 3) Editorial
13497 Dorms War brute force implementation strings Statement B Codeforces Round 788 (Div. 2) {1670} PROGRAMMING 1000.0 Tutorial 1100
22881 A Perfectly Balanced String? brute force greedy strings Statement B Codeforces Round 785 (Div. 2) {1673} PROGRAMMING 750.0 Codeforces Round #785 (Div. 2) Editorial
35285 Most Similar Words brute force greedy implementation implementation math strings Statement C Codeforces Round 790 (Div. 4) {1676} PROGRAMMING Codeforces Round #790 (Div. 4) Editorial
1445 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
17804 Lex String brute force greedy implementation sortings two pointers Statement A Codeforces Round 798 (Div. 2) {1689} PROGRAMMING 500.0 Editorial for Codeforces Round #798 (Div. 2)
17361 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)
27720 3SUM brute force math Statement F Codeforces Round 799 (Div. 4) {1692} PROGRAMMING Codeforces Round #799 (Div. 4) Editorial
1164 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
19878 3SUM Closure brute force data structures Statement C Codeforces Round 803 (Div. 2) {1698} PROGRAMMING 1000.0 Codeforces Round #803 (Div. 2) Editorial
1392 Text Editor brute force dp greedy strings two pointers Statement E Educational Codeforces Round 131 (Rated for Div. 2) {1701} PROGRAMMING Educational Codeforces Round 131 Editorial
29596 Double Strings brute force data structures strings Statement D Codeforces Round 806 (Div. 4) {1703} PROGRAMMING 104786
14655 Mark and His Unfinished Essay brute force implementation Statement C Codeforces Round 807 (Div. 2) {1705} PROGRAMMING 1250.0 Codeforces Round #807 (Div 2.) Editorial
24522 Add Modulo 10 brute force math number theory Statement E Codeforces Round 811 (Div. 3) {1714} PROGRAMMING Codeforces Round #811 (Div. 3) Editorial
3527 Fibonacci Strings brute force data structures greedy implementation math number theory Statement B Codeforces Round 814 (Div. 1) {1718} PROGRAMMING 1250.0 Codeforces Round #814 (Div. 1, Div. 2) Editorial
6777 Xor-Subsequence (easy version) bitmasks brute force dp strings trees Statement D1 Codeforces Round 815 (Div. 2) {1720} PROGRAMMING 1500.0 Codeforces Round #815 (Div. 2) Editorial
2619 Prefix Function Queries bitmasks brute force data structures hashing string suffix structures strings trees Statement E Educational Codeforces Round 134 (Rated for Div. 2) {1721} PROGRAMMING 106416
4607 Kirei and the Linear Function brute force math Statement F Codeforces Round 820 (Div. 3) {1729} PROGRAMMING Codeforces Round #820 (Div. 3) Editorial
8450 Problem with Random Tests brute force hashing probabilities Statement D Educational Codeforces Round 137 (Rated for Div. 2) {1743} PROGRAMMING Educational Codeforces Round 137 Editorial 1700
16939 Diverse Substrings brute force implementation strings Statement B Codeforces Round 833 (Div. 2) {1748} PROGRAMMING 1000.0 Codeforces Round #833 (Div. 2) Editorial 1400
16859 Maximum Substring brute force greedy Statement B CodeTON Round 3 (Div. 1 + Div. 2, Rated, Prizes!) {1750} PROGRAMMING 750.0 CodeTON Round 3 (Div. 1 + Div. 2) Editorial
20471 Gardener and the Capybaras (easy version) brute force implementation strings Statement A1 Codeforces Round 843 (Div. 2) {1775} PROGRAMMING 500.0 Codeforces Round #843 (Div. 2) Editorial
11576 Flexible String bitmasks brute force strings Statement C Codeforces Round 848 (Div. 2) {1778} PROGRAMMING 1250.0 Codeforces Round #848 (Div. 2) Editorial
1963 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
35878 Serval and Mocha's Array brute force math number theory Statement A Codeforces Round 853 (Div. 2) {1789} PROGRAMMING 500.0 Codeforces Round #853 (Div. 2) Editorial
52040 Distinct Split brute force greedy strings Statement D Codeforces Round 849 (Div. 4) {1791} PROGRAMMING 112282
24745 Two Towers brute force implementation strings Statement A Educational Codeforces Round 143 (Rated for Div. 2) {1795} PROGRAMMING 112963
22685 Subsequence Addition (Easy Version) brute force dp greedy implementation sortings Statement G1 Codeforces Round 859 (Div. 4) {1807} PROGRAMMING 114143
3977 Monsters brute force data structures dfs and similar dsu graphs implementation trees Statement E CodeTON Round 4 (Div. 1 + Div. 2, Rated, Prizes!) {1810} PROGRAMMING 2000.0 Editorial of CodeTON Round 4 (Div. 1 + Div. 2, Rated, Prizes!)
21993 Beautiful Sequence brute force greedy Statement A CodeTON Round 4 (Div. 1 + Div. 2, Rated, Prizes!) {1810} PROGRAMMING 500.0 Editorial of CodeTON Round 4 (Div. 1 + Div. 2, Rated, Prizes!)
14724 Constructive Problem brute force greedy implementation Statement A Codeforces Round 866 (Div. 1) {1819} PROGRAMMING 750.0 Codeforces Round #866 (Div.1, Div.2, based on Lipetsk Team Olympiad) Editorial
16354 Tear It Apart brute force implementation math strings Statement C Educational Codeforces Round 147 (Rated for Div. 2) {1821} PROGRAMMING 115296
1723 Palindrome Partition binary search brute force data structures dp hashing strings Statement C Codeforces Round 873 (Div. 1) {1827} PROGRAMMING 1500.0 Codeforces Round #873 (Div. 1 & 2) Editorial 2600
34845 Gold Rush brute force dfs and similar dp implementation Statement D Codeforces Round 871 (Div. 4) {1829} PROGRAMMING Codeforces Round 871 (Div. 4) Editorial 1000
9218 Ranom Numbers brute force dp greedy math strings Statement C Educational Codeforces Round 150 (Rated for Div. 2) {1841} PROGRAMMING 117262
29064 Rudolph and Tic-Tac-Toe brute force implementation strings Statement B Codeforces Round 883 (Div. 3) {1846} PROGRAMMING
4303 Professor Higashikata brute force data structures dsu greedy implementation sortings Statement D Codeforces Round 882 (Div. 2) {1847} PROGRAMMING 2000.0 Tutorial
12700 Binary String Copying binary search brute force data structures hashing strings Statement C Educational Codeforces Round 152 (Rated for Div. 2) {1849} PROGRAMMING 118752
73008 Short Sort brute force implementation Statement A Codeforces Round 898 (Div. 4) {1873} PROGRAMMING 120634
63725 Don't Try to Count brute force strings Statement A Codeforces Round 903 (Div. 3) {1881} PROGRAMMING 121327
13225 Torn Lucky Ticket brute force dp hashing implementation math Statement C Educational Codeforces Round 157 (Rated for Div. 2) {1895} PROGRAMMING Educational Codeforces Round 157 Editorial
17511 Milica and String brute force implementation strings Statement A Codeforces Round 910 (Div. 2) {1898} PROGRAMMING 500.0 Editorial for Codeforces Round #910 (Div. 2)
15024 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
8791 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
9865 Mathematical Problem brute force constructive algorithms implementation math strings Statement D Good Bye 2023 {1916} PROGRAMMING 1500.0
38438 Erase First or Second Letter brute force combinatorics dp strings Statement B Codeforces Round 917 (Div. 2) {1917} PROGRAMMING 1000.0 Editorial of Codeforces Round 917 (Div. 2)
31892 Choose the Different Ones! brute force greedy math Statement C Codeforces Round 923 (Div. 3) {1927} PROGRAMMING 125597
17527 Sasha and the Casino binary search brute force dp games greedy math Statement C Codeforces Round 926 (Div. 2) {1929} PROGRAMMING 1500.0 Codeforces Round #926 (Div. 2) Editorial.
4918 Sum over all Substrings (Easy Version) brute force dp greedy strings Statement D1 think-cell Round 1 {1930} PROGRAMMING 1250.0 think-cell Round 1 Editorial
40231 Recovering a Small String brute force strings Statement A Codeforces Round 925 (Div. 3) {1931} PROGRAMMING 125878
940 GCD is Greater bitmasks brute force number theory Statement H Codeforces Round 935 (Div. 3) {1945} PROGRAMMING 127377
12727 Tandem Repeats? brute force dp strings two pointers Statement D Educational Codeforces Round 163 (Rated for Div. 2) {1948} PROGRAMMING Educational Codeforces Round 163 Editorial
17693 Nearly Shortest Repeating Substring brute force implementation number theory strings Statement E Codeforces Round 937 (Div. 4) {1950} PROGRAMMING Codeforces Round 937 (Div. 4) Editorial
4582 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
2607 Division + LCP (hard version) binary search brute force data structures dp hashing math string suffix structures strings Statement G2 Codeforces Round 943 (Div. 3) {1968} PROGRAMMING 129096 2200
966 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
21274 378QAQ and Mocha's Array brute force greedy math sortings Statement B Codeforces Round 947 (Div. 1 + Div. 2) {1975} PROGRAMMING 500.0 editorial_zh.pdf 1000
20897 Bazoka and Mocha's Array brute force greedy implementation sortings Statement A Codeforces Round 947 (Div. 1 + Div. 2) {1975} PROGRAMMING 250.0 editorial_zh.pdf 800
7950 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
10127 Beauty of the mountains brute force data structures implementation math number theory Statement D Codeforces Round 955 (Div. 2, with prizes from NEAR!) {1982} PROGRAMMING 1750.0 130839
23567 Substring and Subsequence bitmasks brute force dp graphs greedy hashing strings trees Statement B Educational Codeforces Round 167 (Rated for Div. 2) {1989} PROGRAMMING Educational Codeforces Round 167 Editorial
27177 Submission Bait brute force games greedy sortings Statement A Codeforces Round 960 (Div. 2) {1990} PROGRAMMING 500.0 Video Tutorial
2809 Triangle Formation brute force greedy math sortings Statement F Pinely Round 4 (Div. 1 + Div. 2) {1991} PROGRAMMING 2500.0 Video Tutorial
10962 Novice's Mistake brute force constructive algorithms math strings Statement E Codeforces Round 957 (Div. 3) {1992} PROGRAMMING Shayan's Video Tutorial
1666 Minecraft bitmasks brute force dp math Statement G Codeforces Round 959 sponsored by NEAR (Div. 1 + Div. 2) {1994} PROGRAMMING 2750.0 Video Tutorial
3015 Cases bitmasks brute force combinatorics dfs and similar dp graphs greedy strings Statement D Codeforces Round 961 (Div. 2) {1995} PROGRAMMING 2250.0 Video Tutorial
17959 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
42256 Sakurako's Exam brute force constructive algorithms greedy math Statement A Codeforces Round 970 (Div. 3) {2008} PROGRAMMING Codeforces Round 970 (Div. 3) Editorial
13727 Alternating String brute force data structures dp greedy strings Statement E Codeforces Round 970 (Div. 3) {2008} PROGRAMMING Codeforces Round 970 (Div. 3) Editorial
14826 Password Cracking brute force constructive algorithms interactive strings Statement C Codeforces Round 973 (Div. 2) {2013} PROGRAMMING 1250.0 134298
1399 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
20600 Alice's Adventures in ''Chess'' brute force implementation math strings Statement A Codeforces Round 986 (Div. 2) {2028} PROGRAMMING 500.0 Codeforces Round 986 (Div. 2) Editorial
1209 Orangutan Approved Subarrays binary search brute force data structures greedy two pointers Statement F Codeforces Round 979 (Div. 2) {2030} PROGRAMMING 2500.0 Codeforces Round 979 Editorial
23976 Minimise Oneness brute force combinatorics constructive algorithms Statement B Codeforces Round 979 (Div. 2) {2030} PROGRAMMING 500.0 Codeforces Round 979 Editorial
20121 A TRUE Battle brute force games greedy Statement C Codeforces Round 979 (Div. 2) {2030} PROGRAMMING 1000.0 Codeforces Round 979 Editorial
2048 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
22448 Anya and 1100 brute force data structures implementation Statement C Codeforces Round 984 (Div. 3) {2036} PROGRAMMING Codeforces Round 984 (Div. 3) Editorial
24575 Game of Division brute force games math Statement A Codeforces Round 992 (Div. 2) {2040} PROGRAMMING 500.0 Codeforces Round #992 (Div.2) Editorial
19563 Replace Character brute force combinatorics greedy strings Statement B Codeforces Round 990 (Div. 2) {2047} PROGRAMMING 1000.0 Разбор Codeforces Round 990 (Div. 2 + Div. 1)
15409 Kevin and Binary Strings bitmasks brute force greedy strings Statement C Codeforces Global Round 28 {2048} PROGRAMMING 1000.0 Tutorial
22970 Kevin and Combination Lock brute force implementation math number theory Statement A Codeforces Global Round 28 {2048} PROGRAMMING 250.0 Tutorial
19192 pspspsps brute force constructive algorithms implementation Statement B Codeforces Round 994 (Div. 2) {2049} PROGRAMMING 750.0 Codeforces Round #994 (Div. 2) Editorial
25529 Uninteresting Number brute force dp math Statement C Codeforces Round 991 (Div. 3) {2050} PROGRAMMING Разбор Codeforces Round 991 (Div. 3)
19360 Digital string maximization brute force greedy math strings Statement D Codeforces Round 991 (Div. 3) {2050} PROGRAMMING Разбор Codeforces Round 991 (Div. 3)
228 Naive String Splits brute force greedy hashing strings Statement G Good Bye 2024: 2025 is NEAR {2053} PROGRAMMING 4250.0 Good Bye 2024: 2025 is NEAR Editorial
90 Cosmic Divide brute force geometry hashing math strings Statement F Codeforces Round 996 (Div. 2) {2055} PROGRAMMING 3500.0 Codeforces Round 996 (Div. 2) Editorial
2297 Kevin and Binary String (Easy Version) binary search brute force data structures dp greedy implementation strings two pointers Statement F1 IAEPC Preliminary Contest (Codeforces Round 999, Div. 1 + Div. 2) {2061} PROGRAMMING 2000.0 IAEPC Preliminary Contest (Codeforces Round 999, Div. 1 + Div. 2) Editorial
11018 Kevin and Numbers brute force data structures greedy implementation math Statement D IAEPC Preliminary Contest (Codeforces Round 999, Div. 1 + Div. 2) {2061} PROGRAMMING 1500.0 IAEPC Preliminary Contest (Codeforces Round 999, Div. 1 + Div. 2) Editorial
56704 Skibidus and Amog'u brute force constructive algorithms implementation strings Statement A Codeforces Round 1003 (Div. 4) {2065} PROGRAMMING Video Tutorial
1540 Mascot Naming brute force greedy strings Statement F European Championship 2025 - Online Mirror (Unrated, ICPC Rules, Teams Preferred) {2068} PROGRAMMING 140239
6988 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
437 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
3945 Shorten the Array binary search brute force data structures dfs and similar greedy strings trees two pointers Statement G Codeforces Round 1016 (Div. 3) {2093} PROGRAMMING Codeforces Round 1016 (Div. 3) Editorial
5983 Hackers and Neural Networks bitmasks brute force greedy Statement F Codeforces Round 1016 (Div. 3) {2093} PROGRAMMING Codeforces Round 1016 (Div. 3) Editorial
742 Numbers and Strings brute force dfs and similar dp implementation math Statement F Educational Codeforces Round 178 (Rated for Div. 2) {2104} PROGRAMMING Educational Codeforces Round 178 Editorial
36952 Dr. TC brute force math Statement A Codeforces Round 1020 (Div. 3) {2106} PROGRAMMING Codeforces Round 1020 (Div. 3) Editorial
3336 Modular Sorting brute force data structures math number theory Statement G Codeforces Round 1034 (Div. 3) {2123} PROGRAMMING Codeforces Round 1034 (Div. 3) Editorial
44837 Homework brute force implementation strings Statement A Codeforces Round 1043 (Div. 3) {2132} PROGRAMMING Codeforces Round 1043 (Div. 3) Editorial
31810 Redstone? brute force implementation math Statement A Codeforces Round 1044 (Div. 2) {2133} PROGRAMMING 500.0 Codeforces Round 1044 (Div. 2) Editorial
3535 Maple and Tree Beauty (Hard Version) bitmasks brute force dfs and similar divide and conquer dp fft trees Statement C2 Codeforces Round 1048 (Div. 1) {2138} PROGRAMMING 750.0 Codeforces Round 1048 (Div. 1, Div. 2) Editorial
3419 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
5552 Make Connected brute force dsu implementation Statement B Pinely Round 5 (Div. 1 + Div. 2) {2161} PROGRAMMING 1000.0
21861 Sequence Game brute force greedy Statement A Codeforces Global Round 30 (Div. 1 + Div. 2) {2164} PROGRAMMING 500.0 Codeforces Global Round 30 Editorial
23553 Same Difference brute force dp strings Statement A Codeforces Round 1064 (Div. 2) {2166} PROGRAMMING 500.0 Codeforces Round 1064 (Div. 1, Div. 2) Editorial
26410 Yes or Yes brute force greedy strings Statement A Good Bye 2025 {2178} PROGRAMMING 500.0