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21315 Codeforces Subsequences brute force constructive algorithms greedy math strings Statement B Codeforces Global Round 8 {1368} PROGRAMMING 1000.0 Codeforces Global Round 8: editorial
17193 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)
1369 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
428 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