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9405 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
10949 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
394 Hamming Triples implementation math two pointers Statement E Codeforces Round 238 (Div. 1) {406} PROGRAMMING Codeforces Round #238 Tutorial 2700
6033 Barnicle brute force implementation math strings Statement B Codeforces Round 362 (Div. 2) {697} PROGRAMMING 1400
12530 Passwords implementation math sortings strings Statement B Codeforces Round 374 (Div. 2) {721} PROGRAMMING Codeforces Round #374 (Div. 2) Editorial 1200
2797 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
6721 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
4807 Reverse bitmasks implementation math strings Statement F Codeforces Round 760 (Div. 3) {1618} PROGRAMMING Codeforces Round #760 (Div. 3) Editorial
7333 BA-String bitmasks brute force dp greedy implementation math shortest paths Statement C Educational Codeforces Round 119 (Rated for Div. 2) {1620} PROGRAMMING 98061
8026 Promising String (easy version) brute force implementation math strings Statement F1 Codeforces Round 780 (Div. 3) {1660} PROGRAMMING Codeforces Round #780 (Div. 3) Editorial
3211 Promising String (hard version) data structures implementation math strings Statement F2 Codeforces Round 780 (Div. 3) {1660} PROGRAMMING Codeforces Round #780 (Div. 3) Editorial
35430 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
3547 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
41479 Polycarp and the Day of Pi implementation math strings Statement A Codeforces Round 847 (Div. 3) {1790} PROGRAMMING 111948
29550 Subsequence Addition (Hard Version) dp greedy implementation math sortings Statement G2 Codeforces Round 859 (Div. 4) {1807} PROGRAMMING 114143
16455 Tear It Apart brute force implementation math strings Statement C Educational Codeforces Round 147 (Rated for Div. 2) {1821} PROGRAMMING 115296
2244 Omsk Metro (hard version) data structures dfs and similar divide and conquer dp implementation math trees Statement F2 Codeforces Round 881 (Div. 3) {1843} PROGRAMMING Codeforces Round #881 (Div. 3) Editorial
9885 Mathematical Problem brute force constructive algorithms implementation math strings Statement D Good Bye 2023 {1916} PROGRAMMING 1500.0
28519 2023 constructive algorithms implementation math number theory Statement A Good Bye 2023 {1916} PROGRAMMING 250.0
2257 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
4675 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
17704 GCD-sequence greedy implementation math math number theory number theory Statement D Codeforces Round 950 (Div. 3) {1980} PROGRAMMING 130135
10183 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
27663 Soccer greedy implementation math sortings Statement A Codeforces Round 955 (Div. 2, with prizes from NEAR!) {1982} PROGRAMMING 500.0 130839
3979 ''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
44838 Primary Task implementation math strings Statement A Codeforces Round 966 (Div. 3) {2000} PROGRAMMING 132689
20680 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
23019 Kevin and Combination Lock brute force implementation math number theory Statement A Codeforces Global Round 28 {2048} PROGRAMMING 250.0 Tutorial