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Solved |
Name |
Tags |
Solutions |
Index |
Contest |
Type |
Points |
Tutorial |
Rating Level |
|---|---|---|---|---|---|---|---|---|---|
| 4700 | Palindrome Degree | hashing strings | Statement | D | Codeforces Beta Round 7 {7} | PROGRAMMING | 2200 | ||
| 3318 | Test | hashing strings | Statement | E | Codeforces Beta Round 25 (Div. 2 Only) {25} | PROGRAMMING | Codeforces Beta Round #25 Solution Analysis | 2300 | |
| 961 | 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 | |
| 3631 | Spelling Check | hashing implementation strings | Statement | J | School Team Contest 1 (Winter Computer School 2010/11) {39} | PROGRAMMING | School Team Contest #1 (Winter Computer School 2010/11): Problem K Tutorial | 1600 | |
| 2142 | Beaver | data structures dp greedy hashing strings two pointers | Statement | C | Codeforces Beta Round 71 {79} | PROGRAMMING | Codeforces Beta Round #71 Editorial | 1800 | |
| 3342 | Petr# | brute force data structures hashing strings | Statement | B | Codeforces Beta Round 86 (Div. 1 Only) {113} | PROGRAMMING | Codeforces Beta Round #86 Editorial | 1900 | |
| 687 | String Transformation | hashing strings | Statement | D | Codeforces Beta Round 90 {119} | PROGRAMMING | Codeforces Beta Round #90 (editorial) | 2500 | |
| 26062 | Password | binary search dp hashing string suffix structures strings | Statement | B | Codeforces Beta Round 93 (Div. 1 Only) {126} | PROGRAMMING | Tutorial | 1800 | |
| 2928 | String | brute force constructive algorithms hashing implementation string suffix structures strings | Statement | B | Codeforces Beta Round 94 (Div. 1 Only) {128} | PROGRAMMING | 3219 | 2200 | |
| 9360 | 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 | |
| 643 | The Next Good String | data structures greedy hashing strings | Statement | D | Codeforces Round 124 (Div. 1) {196} | PROGRAMMING | Codeforces Round #124 — editorial | 2600 | |
| 399 | Polycarpus is Looking for Good Substrings | bitmasks hashing implementation | Statement | B | VK Cup 2012 Finals (unofficial online-version) {212} | PROGRAMMING | 2300 | ||
| 1031 | Two Permutations | data structures hashing strings | Statement | E | Codeforces Round 131 (Div. 1) {213} | PROGRAMMING | Codeforces Round #131 Tutorial | 2600 | |
| 9487 | Queries for Number of Palindromes | dp hashing strings | Statement | H | CROC-MBTU 2012, Elimination Round (ACM-ICPC) {245} | PROGRAMMING | КРОК-МВТУ 2012, Отборочный раунд (Разбор) | 1900 | |
| 1643 | Tree-String Problem | *special dfs and similar hashing strings | Statement | E | Croc Champ 2013 - Qualification Round {291} | PROGRAMMING | 2400 | ||
| 1093 | Good Substrings | hashing strings | Statement | G1 | ABBYY Cup 3.0 {316} | PROGRAMMING | 1700 | ||
| 787 | Have You Ever Heard About the Word? | greedy hashing string suffix structures strings | Statement | D | Codeforces Round 189 (Div. 1) {319} | PROGRAMMING | Codeforces Round #189 — Editorial | 2700 | |
| 566 | Xenia and String Problem | dp hashing implementation string suffix structures strings | Statement | E | Codeforces Round 207 (Div. 1) {356} | PROGRAMMING | 9210 | 2800 | |
| 896 | DZY Loves Strings | binary search hashing strings two pointers | Statement | D | Codeforces Round 254 (Div. 1) {444} | PROGRAMMING | Codeforces Round #254 Editorial | 2400 | |
| 2084 | Fedor and Essay | dfs and similar dp graphs hashing strings | Statement | D | Codeforces Round 267 (Div. 2) {467} | PROGRAMMING | 2100 | ||
| 1092 | Misha and LCP on Tree | binary search dfs and similar hashing string suffix structures trees | Statement | E | Codeforces Round 285 (Div. 1) {504} | PROGRAMMING | 15743 | 3000 | |
| 8373 | Watto and Mechanism | binary search data structures hashing string suffix structures strings | Statement | C | Codeforces Round 291 (Div. 2) {514} | PROGRAMMING | Codeforces Round #291 (Div. 2) Editorial | 1900 | |
| 640 | And Yet Another Bracket Sequence | data structures greedy hashing string suffix structures strings | Statement | F | VK Cup 2015 - Round 1 {524} | PROGRAMMING | VK Cup Round 1 (+ online mirror) editorial | 2700 | |
| 16573 | Vitaliy and Pie | greedy hashing strings | Statement | A | Codeforces Round 297 (Div. 2) {525} | PROGRAMMING | Codeforces Round #297 (Div.2) Editorial | 1200 | |
| 2529 | Om Nom and Necklace | hashing string suffix structures strings | Statement | D | ZeptoLab Code Rush 2015 {526} | PROGRAMMING | ZeptoLab Code Rush 2015 — Editorial | 2200 | |
| 2454 | 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 | |
| 981 | Encoding | hashing string suffix structures strings | Statement | F | VK Cup 2015 - Round 2 (unofficial online mirror, Div. 1 only) {533} | PROGRAMMING | Разбор VK Cup Round 2 | 2400 | |
| 4848 | Tavas and Malekas | greedy hashing string suffix structures strings | Statement | D | Codeforces Round 299 (Div. 2) {535} | PROGRAMMING | Codeforces Round #299 Editorial | 2100 | |
| 11827 | Equivalent Strings | divide and conquer hashing sortings strings | Statement | B | Codeforces Round 313 (Div. 1) {559} | PROGRAMMING | Codeforces Round 313 — Extended editoral | 1800 | |
| 2700 | Kefa and Watch | data structures hashing strings | Statement | E | Codeforces Round 321 (Div. 2) {580} | PROGRAMMING | Codeforces Round #321 Editorial | 2700 | |
| 1270 | Acyclic Organic Compounds | data structures dfs and similar dsu hashing strings trees | Statement | D | Codeforces Round 333 (Div. 1) {601} | PROGRAMMING | Codeforces Round #333 — editorial | 2400 | |
| 855 | Marbles | hashing strings | Statement | C | Codeforces Round 336 (Div. 1) {607} | PROGRAMMING | Codeforces Round #336 Editorial | 2600 | |
| 2805 | New Year and Ancient Prophecy | dp hashing strings | Statement | D | Good Bye 2015 {611} | PROGRAMMING | Tutorial | 1900 | |
| 541 | Puzzle Lover | dp hashing strings | Statement | E | Codeforces Round 339 (Div. 1) {613} | PROGRAMMING | Tutorial | 3200 | |
| 2490 | Messenger | data structures hashing implementation string suffix structures strings | Statement | D | Codeforces Round 344 (Div. 2) {631} | PROGRAMMING | Editorial Codeforces Round #344 (Div. 2) | 2100 | |
| 3436 | Spy Syndrome 2 | data structures dp hashing implementation sortings string suffix structures strings | Statement | C | Manthan, Codefest 16 {633} | PROGRAMMING | Manthan, Codefest 16: Editorials | 1900 | |
| 2626 | 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 | |
| 1622 | Games on a CD | data structures hashing string suffix structures strings | Statement | E | Technocup 2017 - Elimination Round 1 (Unofficially Open for Everyone, Rated for Div. 2) {727} | PROGRAMMING | Tutorial | 2300 | |
| 2477 | Felicity is Coming! | data structures hashing sortings strings | Statement | C | Codecraft-17 and Codeforces Round 391 (Div. 1 + Div. 2, combined) {757} | PROGRAMMING | CodeCraft-17 and Codeforces Round #391 (Div. 1 + Div. 2, combined) Editorial | 1900 | |
| 3059 | Two strings | binary search hashing strings two pointers | Statement | C | Educational Codeforces Round 17 {762} | PROGRAMMING | Tutorial | 2100 | |
| 1024 | 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 | |
| 174 | Rap God | data structures dfs and similar hashing strings trees | Statement | D | Codeforces Round 406 (Div. 1) {786} | PROGRAMMING | Codeforces Round #406 Editorial | 3300 | |
| 1200 | Liar | binary search dp hashing string suffix structures | Statement | E | Codeforces Round 422 (Div. 2) {822} | PROGRAMMING | Codeforces Round #422 (Div. 2) Editorial | 2500 | |
| 2104 | String Compression | dp hashing string suffix structures strings | Statement | F | Educational Codeforces Round 25 {825} | PROGRAMMING | Educational Codeforces Round 25 - Editorial | 2400 | |
| 4809 | Palindromic characteristics | brute force dp hashing strings | Statement | D | Codeforces Round 427 (Div. 2) {835} | PROGRAMMING | Editorial | 1900 | |
| 1627 | 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 | |
| 1093 | Death Stars (medium) | hashing strings | Statement | A2 | Helvetic Coding Contest 2018 online mirror (teams allowed, unrated) {958} | PROGRAMMING | helvetic-coding-contest-2018-editorial.pdf | 2100 | |
| 966 | k-substrings | binary search hashing string suffix structures | Statement | F | Educational Codeforces Round 41 (Rated for Div. 2) {961} | PROGRAMMING | Educational Codeforces Round 41 Editorial | 2700 | |
| 2900 | Frequency of String | hashing string suffix structures strings | Statement | D | Tinkoff Internship Warmup Round 2018 and Codeforces Round 475 (Div. 1) {963} | PROGRAMMING | Editorial Tinkoff Internship Warmup Round 2018 and Codeforces Round #475 (Div. 1 + Div. 2) | 2400 | |
| 2210 | Isomorphic Strings | hashing strings | Statement | F | Educational Codeforces Round 44 (Rated for Div. 2) {985} | PROGRAMMING | Educational Codeforces Round 44 Editorial | 2400 | |
| 1648 | Abbreviation | dp hashing strings | Statement | F | Codeforces Round 494 (Div. 3) {1003} | PROGRAMMING | 60417 | 2400 | |
| 1120 | The Supersonic Rocket | geometry hashing strings | Statement | E | Codeforces Round 502 (in memory of Leopoldo Taravilse, Div. 1 + Div. 2) {1017} | PROGRAMMING | Разбор (англ.) | 2400 | |
| 329 | Speckled Band | data structures divide and conquer hashing string suffix structures strings | Statement | G | Codeforces Round 519 by Botan Investments {1043} | PROGRAMMING | Codeforces Round #519 Editorial | 3500 | |
| 5591 | Palindrome Pairs | hashing strings | Statement | I | Bubble Cup 11 - Finals [Online Mirror, Div. 1] {1045} | PROGRAMMING | E | 1700 | |
| 1306 | Vasya and Big Integers | binary search data structures dp hashing strings | Statement | E | Educational Codeforces Round 51 (Rated for Div. 2) {1051} | PROGRAMMING | Educational Codeforces Round 51 Editorial | 2500 | |
| 2892 | 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 | |
| 134 | Palindromic Magic | data structures hashing strings | Statement | H | Avito Cool Challenge 2018 {1081} | PROGRAMMING | 63888 | 3500 | |
| 4565 | Sasha and One More Name | constructive algorithms hashing strings | Statement | B | Codeforces Round 539 (Div. 1) {1109} | PROGRAMMING | Codeforces Round #539 Editorial | 1800 | |
| 1030 | Morse Code | binary search data structures dp hashing sortings string suffix structures strings | Statement | C | Codeforces Round 542 [Alex Lopashev Thanks-Round] (Div. 1) {1129} | PROGRAMMING | 65520 | 2300 | |
| 7132 | Camp Schedule | greedy hashing strings | Statement | B | Codeforces Round 545 (Div. 1) {1137} | PROGRAMMING | Codeforces Round #545 – Editorial | 1700 | |
| 9733 | 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 | |
| 1306 | Indie Album | data structures dfs and similar hashing string suffix structures strings trees | Statement | G | Educational Codeforces Round 71 (Rated for Div. 2) {1207} | PROGRAMMING | Educational Codeforces Round 71 Editorial | 2600 | |
| 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 | |
| 778 | Concatenation with intersection | data structures hashing strings two pointers | Statement | E | Codeforces Round 622 (Div. 2) {1313} | PROGRAMMING | 2500.0 | Editorial | 2800 |
| 1726 | Reachable Strings | data structures hashing string suffix structures strings strings | Statement | D | Codeforces Round 625 (Div. 1, based on Technocup 2020 Final Round) {1320} | PROGRAMMING | 2000.0 | Codeforces Round #625 Editorial | |
| 13446 | Prefix-Suffix Palindrome (Easy version) | hashing string suffix structures strings | Statement | D1 | Codeforces Global Round 7 {1326} | PROGRAMMING | 1000.0 | 74961 | 1500 |
| 12037 | Prefix-Suffix Palindrome (Hard version) | greedy hashing string suffix structures strings | Statement | D2 | Codeforces Global Round 7 {1326} | PROGRAMMING | 1000.0 | 74961 | 1800 |
| 13682 | 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 | |
| 482 | Twilight and Ancient Scroll (easier version) | dp hashing implementation string suffix structures strings | Statement | E1 | Codeforces Round 662 (Div. 2) {1393} | PROGRAMMING | 1500.0 | Codeforces Round #662 Editorial | |
| 1346 | Death DBMS | data structures hashing string suffix structures strings trees | Statement | G | Educational Codeforces Round 97 (Rated for Div. 2) {1437} | PROGRAMMING | 84149 | ||
| 17429 | String Equality | dp greedy hashing implementation strings | Statement | C | Codeforces Round 685 (Div. 2) {1451} | PROGRAMMING | 1250.0 | Editorial — Codeforces Round #685 | |
| 1052 | Song of the Sirens | divide and conquer hashing math strings | Statement | G | Good Bye 2020 {1466} | PROGRAMMING | 2500.0 | Good Bye 2020 Editorial | |
| 2244 | 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 | ||
| 37500 | Double-ended Strings | brute force dp hashing strings | Statement | C | Codeforces Round 710 (Div. 3) {1506} | PROGRAMMING | Editorial | ||
| 700 | String Distance | binary search data structures hashing string suffix structures strings | Statement | F | Educational Codeforces Round 110 (Rated for Div. 2) {1535} | PROGRAMMING | 91481 | ||
| 16315 | Diluc and Kaeya | dp hashing number theory | Statement | C | Codeforces Round 724 (Div. 2) {1536} | PROGRAMMING | 1500.0 | Codeforces Round #724 — Editorial | 1500 |
| 16891 | 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 | |
| 6356 | Erase and Extend (Hard Version) | binary search data structures greedy hashing string suffix structures strings | Statement | E2 | Codeforces Round 726 (Div. 2) {1537} | PROGRAMMING | 1750.0 | Codeforces Round #726 (Div.2) Editorial | |
| 3269 | Funny Substrings | brute force data structures hashing implementation strings | Statement | E | Codeforces Round 725 (Div. 3) {1538} | PROGRAMMING | Codeforces Round #725 (Div. 3) Editorial | ||
| 15592 | 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 | |
| 441 | The Sum of Good Numbers | hashing probabilities | Statement | G | Educational Codeforces Round 115 (Rated for Div. 2) {1598} | PROGRAMMING | 95890 | ||
| 300 | Alphabetic Tree | binary search data structures dfs and similar hashing string suffix structures strings trees | Statement | G | Codeforces Round 758 (Div.1 + Div. 2) {1608} | PROGRAMMING | 2750.0 | Editorial of Codeforces Round #758 (Div.1 + Div. 2) | |
| 4664 | 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 | ||
| 1503 | Minimal String Xoration | bitmasks data structures divide and conquer hashing strings | Statement | F | Codeforces Round 778 (Div. 1 + Div. 2, based on Technocup 2022 Final Round) {1654} | PROGRAMMING | 3000.0 | Editorial of Codeforces Round #778 (Div. 1 + Div. 2, based on Technocup 2022 Final Round) | 2800 |
| 3317 | Preorder | combinatorics divide and conquer dp dsu hashing trees | Statement | E | Educational Codeforces Round 127 (Rated for Div. 2) {1671} | PROGRAMMING | 102181 | ||
| 2654 | 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 | ||
| 2593 | Cut Substrings | combinatorics dp hashing strings two pointers | Statement | G | Codeforces Round 820 (Div. 3) {1729} | PROGRAMMING | Codeforces Round #820 (Div. 3) Editorial | ||
| 8465 | 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 | |
| 1668 | Hossam and Range Minimum Query | binary search bitmasks data structures hashing probabilities strings trees | Statement | F | Codeforces Round 837 (Div. 2) {1771} | PROGRAMMING | 3500.0 | Codeforces Round #837 (Div. 2) Editorial | |
| 30177 | Remove Two Letters | data structures greedy hashing strings | Statement | D | Codeforces Round 855 (Div. 3) {1800} | PROGRAMMING | Codeforces Round 855 (Div. 3) Editorial | ||
| 2636 | Symmetree | dfs and similar hashing trees | Statement | G | Codeforces Round 855 (Div. 3) {1800} | PROGRAMMING | Codeforces Round 855 (Div. 3) Editorial | ||
| 1755 | 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 |
| 2327 | Hyperregular Bracket Strings | combinatorics hashing number theory sortings two pointers | Statement | C | Codeforces Round 875 (Div. 1) {1830} | PROGRAMMING | 1750.0 | Codeforces Round #875 (Div.1 + Div. 2) Editorial | |
| 12725 | Binary String Copying | binary search brute force data structures hashing strings | Statement | C | Educational Codeforces Round 152 (Rated for Div. 2) {1849} | PROGRAMMING | 118752 | ||
| 13255 | 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 | ||
| 5866 | Collapsing Strings | binary search data structures dfs and similar hashing strings trees | Statement | E | Educational Codeforces Round 159 (Rated for Div. 2) {1902} | PROGRAMMING | Educational Codeforces Round 159 Editorial | ||
| 693 | Pumping Lemma | hashing string suffix structures strings | Statement | G | Pinely Round 3 (Div. 1 + Div. 2) {1909} | PROGRAMMING | 4000.0 | Editorial of Pinely Round 3 (Div. 1 + Div. 2) | |
| 582 | Palindromic Problem | binary search data structures hashing strings | Statement | F | Educational Codeforces Round 160 (Rated for Div. 2) {1913} | PROGRAMMING | 123493 | ||
| 4668 | Non-Palindromic Substring | data structures hashing implementation math strings | Statement | B | Codeforces Round 934 (Div. 1) {1943} | PROGRAMMING | 1250.0 | Codeforces Round #934 (Div1, Div2) Editorial | |
| 4592 | 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 | |
| 5413 | Division + LCP (easy version) | binary search data structures dp hashing string suffix structures strings | Statement | G1 | Codeforces Round 943 (Div. 3) {1968} | PROGRAMMING | 129096 | 1900 | |
| 2617 | 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 | |
| 7960 | 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 | |
| 13249 | Permutation of Rows and Columns | constructive algorithms data structures hashing math matrices sortings | Statement | E | Codeforces Round 950 (Div. 3) {1980} | PROGRAMMING | 130135 | ||
| 3970 | ''a'' String Problem | hashing implementation math string suffix structures strings | Statement | D | Codeforces Global Round 26 {1984} | PROGRAMMING | 2500.0 | Codeforces Global Round 26 Editorial | |
| 23605 | 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 | ||
| 4758 | Message Transmission Error (hard version) | hashing strings two pointers | Statement | C2 | Testing Round 19 (Div. 3) {2010} | PROGRAMMING | 1700 | ||
| 1400 | 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 | |
| 2053 | 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 | |
| 758 | Polyathlon | data structures hashing string suffix structures strings | Statement | I | 2024-2025 ICPC, NERC, Southern and Volga Russian Regional Contest (Unrated, Online Mirror, ICPC Rules, Preferably Teams) {2038} | PROGRAMMING | 2500 | ||
| 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 | |
| 7214 | Palindrome Shuffle | binary search greedy hashing strings two pointers | Statement | D | Educational Codeforces Round 174 (Rated for Div. 2) {2069} | PROGRAMMING | 139774 | ||
| 298 | Shifts and Swaps | graphs hashing strings | Statement | F | Codeforces Round 1030 (Div. 2) {2118} | PROGRAMMING | 3500.0 | Codeforces Round 1030 (Div. 2) Editorial | |
| 531 | Famous Choreographer | hashing strings | Statement | G | Codeforces Round 1043 (Div. 3) {2132} | PROGRAMMING | Codeforces Round 1043 (Div. 3) Editorial | ||
| 761 | String Cutting | binary search brute force greedy hashing string suffix structures strings | Statement | F | Educational Codeforces Round 189 (Rated for Div. 2) {2225} | PROGRAMMING | Tutorial |