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竟然WA 3次为什么会错了这么多次啊。 竟然没看到单调递增，我还以为是不减呢？ 很简单的一个问题，根本不用DP吗！ 不过要想加快点，还要写写二分！！！！！！·· Followed by: Post your reply here: |
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