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Educational Codeforces Round 136
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A: 模拟 B: 模拟,直到可以加也可以减 C: A 拿到 n 则 A 胜利,B 拿到 n-1 和 n 则 B 胜利,否则 A 用 n-1 顶出 B 的 n,变成 n-2 的情况,用组合数算一下 D: 二分答案,从下往上贪心切分 E: DP 机器人走的路径,要求转弯的地方必须是脏的,并且不能连续转两次 F: 给的串实际上可以转化成一条链,然后在 AC 自动机上 DP
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