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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Educational Codeforces Round 163 (Rated for Div. 2)
A. Special Characters 题意 给出一个 nn ，请你创建一个字符串，满足其中有 nn 个特 …
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