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Solved |
Name |
Tags |
Solutions |
Index |
Contest |
Type |
Points |
Tutorial |
Rating Level |
|---|---|---|---|---|---|---|---|---|---|
| 926 | 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 | |
| 2122 | Beaver | data structures dp greedy hashing strings two pointers | Statement | C | Codeforces Beta Round 71 {79} | PROGRAMMING | Codeforces Beta Round #71 Editorial | 1800 | |
| 3271 | Petr# | brute force data structures hashing strings | Statement | B | Codeforces Beta Round 86 (Div. 1 Only) {113} | PROGRAMMING | Codeforces Beta Round #86 Editorial | 1900 | |
| 603 | The Next Good String | data structures greedy hashing strings | Statement | D | Codeforces Round 124 (Div. 1) {196} | PROGRAMMING | Codeforces Round #124 — editorial | 2600 | |
| 972 | Two Permutations | data structures hashing strings | Statement | E | Codeforces Round 131 (Div. 1) {213} | PROGRAMMING | Codeforces Round #131 Tutorial | 2600 | |
| 8223 | 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 | |
| 597 | 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 | |
| 2588 | Kefa and Watch | data structures hashing strings | Statement | E | Codeforces Round 321 (Div. 2) {580} | PROGRAMMING | Codeforces Round #321 Editorial | 2700 | |
| 1247 | 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 | |
| 2449 | 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 | |
| 3390 | 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 | |
| 2523 | 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 | |
| 1577 | 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 | |
| 2466 | 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 | |
| 168 | Rap God | data structures dfs and similar hashing strings trees | Statement | D | Codeforces Round 406 (Div. 1) {786} | PROGRAMMING | Codeforces Round #406 Editorial | 3300 | |
| 325 | 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 | |
| 1222 | 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 | |
| 2836 | 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 | |
| 131 | Palindromic Magic | data structures hashing strings | Statement | H | Avito Cool Challenge 2018 {1081} | PROGRAMMING | 63888 | 3500 | |
| 1005 | 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 | |
| 1236 | 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 | |
| 721 | Concatenation with intersection | data structures hashing strings two pointers | Statement | E | Codeforces Round 622 (Div. 2) {1313} | PROGRAMMING | 2500.0 | Editorial | 2800 |
| 1699 | 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 | |
| 1277 | Death DBMS | data structures hashing string suffix structures strings trees | Statement | G | Educational Codeforces Round 97 (Rated for Div. 2) {1437} | PROGRAMMING | 84149 | ||
| 607 | String Distance | binary search data structures hashing string suffix structures strings | Statement | F | Educational Codeforces Round 110 (Rated for Div. 2) {1535} | PROGRAMMING | 91481 | ||
| 6209 | 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 | |
| 3228 | Funny Substrings | brute force data structures hashing implementation strings | Statement | E | Codeforces Round 725 (Div. 3) {1538} | PROGRAMMING | Codeforces Round #725 (Div. 3) Editorial | ||
| 247 | 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) | |
| 1489 | 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 |
| 2562 | 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 | ||
| 1571 | 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 | |
| 29648 | Remove Two Letters | data structures greedy hashing strings | Statement | D | Codeforces Round 855 (Div. 3) {1800} | PROGRAMMING | Codeforces Round 855 (Div. 3) Editorial | ||
| 1669 | 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 |
| 12588 | Binary String Copying | binary search brute force data structures hashing strings | Statement | C | Educational Codeforces Round 152 (Rated for Div. 2) {1849} | PROGRAMMING | 118752 | ||
| 5690 | 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 | ||
| 550 | Palindromic Problem | binary search data structures hashing strings | Statement | F | Educational Codeforces Round 160 (Rated for Div. 2) {1913} | PROGRAMMING | 123493 | ||
| 4575 | 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 | |
| 5332 | 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 | |
| 2537 | 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 | |
| 13089 | Permutation of Rows and Columns | constructive algorithms data structures hashing math matrices sortings | Statement | E | Codeforces Round 950 (Div. 3) {1980} | PROGRAMMING | 130135 | ||
| 750 | 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 |