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10863 Bear and Prime Numbers binary search brute force data structures dp implementation math number theory Statement C Codeforces Round 226 (Div. 2) {385} PROGRAMMING Codeforces Round #226 (Div. 2) — Editorial 1800
13550 Little Dima and Equation brute force implementation math number theory Statement B Codeforces Round 262 (Div. 2) {460} PROGRAMMING 13465 1500
25146 Counterexample brute force implementation math number theory Statement A Codeforces Round 275 (Div. 2) {483} PROGRAMMING Codeforces Round #275 Editorial 1100
5433 Primes or Palindromes? brute force implementation math number theory Statement A Codeforces Round 315 (Div. 1) {568} PROGRAMMING Codeforces Round #315 Editorial 1700
3201 Video Cards brute force data structures implementation math number theory Statement F Codeforces Round 376 (Div. 2) {731} PROGRAMMING 47840 1900
820 Timofey and remoduling brute force implementation math number theory Statement C Codeforces Round 395 (Div. 1) {763} PROGRAMMING Codeforces Round #395 [Editorial] 2500
1393 Bamboo Partition brute force data structures implementation math number theory sortings two pointers Statement C Codeforces Round 424 (Div. 1, rated, based on VK Cup Finals) {830} PROGRAMMING Codeforces Round #424 Editorial 2500
8063 Trailing Loves (or L'oeufs?) brute force implementation math number theory Statement C Codeforces Round 538 (Div. 2) {1114} PROGRAMMING Codeforces Round #538 (Div. 2) Editorial 1700
1245 Graph Traveler brute force data structures dfs and similar dp graphs implementation math number theory Statement F Codeforces Round 578 (Div. 2) {1200} PROGRAMMING Codeforces Round #578 (Div. 2) Editorial 2500
5560 Asterism (Easy Version) brute force combinatorics implementation math number theory sortings Statement E1 Codeforces Round 654 (Div. 2) {1371} PROGRAMMING 1500.0 Codeforces Round #654 (Div. 2) Editorial
20726 Scenes From a Memory brute force implementation math number theory Statement B Codeforces Round 741 (Div. 2) {1562} PROGRAMMING 1000.0 Editorial of Codeforces Round 741 (Div. 2)
5447 Array Stabilization (AND version) binary search brute force graphs greedy implementation math number theory shortest paths Statement F Codeforces Round 744 (Div. 3) {1579} PROGRAMMING Codeforces Round #744 (Div. 3) Editorial
3573 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
17922 Bestie brute force constructive algorithms implementation math number theory Statement A Codeforces Round 830 (Div. 2) {1732} PROGRAMMING 750.0 108327 1000
1010 Serval and Music Game brute force combinatorics implementation math number theory Statement E Codeforces Round 853 (Div. 2) {1789} PROGRAMMING 2000.0 Codeforces Round #853 (Div. 2) Editorial
2907 MEX of LCM binary search brute force data structures implementation math number theory two pointers Statement E Codeforces Round 879 (Div. 2) {1834} PROGRAMMING 2500.0 Codeforces Round #879 Editorial
25601 We Were Both Children brute force implementation math number theory Statement F Codeforces Round 886 (Div. 4) {1850} PROGRAMMING Codeforces Round #886 (Div. 4) Editorial
13240 The Walkway brute force greedy implementation math number theory Statement B Codeforces Round 893 (Div. 2) {1858} PROGRAMMING 1250.0 Codeforces Round #893 (Div. 2) Editorial 1500
4633 Suspicious logarithms binary search brute force implementation math number theory Statement D Codeforces Round 907 (Div. 2) {1891} PROGRAMMING 1500.0
10306 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
20118 Collatz Conjecture brute force implementation math number theory Statement B Codeforces Round 955 (Div. 2, with prizes from NEAR!) {1982} PROGRAMMING 1000.0 130839
10506 Squaring brute force constructive algorithms data structures greedy implementation math number theory Statement C Codeforces Round 961 (Div. 2) {1995} PROGRAMMING 1750.0 Video Tutorial
23080 Kevin and Combination Lock brute force implementation math number theory Statement A Codeforces Global Round 28 {2048} PROGRAMMING 250.0 Tutorial
1332 RReeppeettiittiioonn binary search brute force implementation math number theory Statement B Codeforces Round 1092 (Unrated, Div. 1, Based on THUPC 2026 — Finals) {2215} PROGRAMMING 1250.0 152930