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7281 Breaking the Wall binary search brute force constructive algorithms greedy math Statement E Codeforces Round 786 (Div. 3) {1674} PROGRAMMING 102482
8765 Arcology On Permafrost binary search brute force constructive algorithms greedy math Statement D Teza Round 1 (Codeforces Round 1015, Div. 1 + Div. 2) {2084} PROGRAMMING 1750.0 141155