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原来如此，还是不解~求大牛指导！这题WA和RE了10多次，后来把所有变量都改成了long long还是不行，最后只能求题解了，看了别人的代码只改了一处const long long INF=(long long)1<<63-1就神奇的A了速度还可以，610ms;开始我写的是const long long INF=999999999;求解这样写为什么不行？ Followed by:
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