AtCoder Beginner Contest 461
A – Armor 题意 给出 AA DD，若 A≤DA \leq D，则输出 YesYes，否则 …
Educational Codeforces Round 193 (Rated for Div. 2)
A. The Best Card 题意 给出 n 张上面分别写着 2, 3, 4, 5, 6, . . . n …
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