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摘要: 题意:问有没有数对(i,j)(0x)是否出现,所以要逆序枚举。代码:#include #include #include #include #include #include #define Mod 1000000007#define lll __int64#define ll long longu...阅读全文
posted @ 2015-03-08 15:28 whatbeg 阅读(241) 评论(0) 编辑