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这个题wa得真苦……在查了n个日日夜夜的程序、做了无数组随机数据后都没有发现错误…… 最后看了Lihaoyuan的程序才发现原来数据范围有点BT！！ 2^31，再加上一个1000000就超了！！！！！！ ft~~~~~~~~~~ rp不行了~~~~~~~ Followed by:
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