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3314 Subtangle Game (Easy Version) dp games greedy implementation Statement E1 Codeforces Round 972 (Div. 2) {2005} PROGRAMMING 1500.0 Discussion stream (With Hints)
1056 Subtangle Game (Hard Version) dp games greedy implementation Statement E2 Codeforces Round 972 (Div. 2) {2005} PROGRAMMING 2000.0 Discussion stream (With Hints)
325 Speedbreaker Counting (Easy Version) combinatorics dp games greedy implementation math Statement F1 Codeforces Round 975 (Div. 1) {2018} PROGRAMMING 1500.0 Editorial of Codeforces Round 975 (Div. 1, Div. 2)