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检查过了，数据中似乎存有所有D和为0的情况，有错的样子。。。In Reply To:不对啊，中间这行只有在N=0或者所有D的和为0时才有作用，但题目输入描述中限制了大于0啊！ Posted by:xreborner at 2004-07-18 20:55:16 Followed by:
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