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8116 Rock, Paper, Scissors brute force constructive algorithms flows greedy math Statement E Codeforces Round 674 (Div. 3) {1426} PROGRAMMING 83120 1800
1643 Four Points brute force constructive algorithms flows geometry greedy math ternary search Statement E Educational Codeforces Round 99 (Rated for Div. 2) {1455} PROGRAMMING 85186