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54B是这样的,,main(a){while(~scanf("%d",&a))puts(a&a-1?"NO":"YES");}

Posted by yy17yy at 2011-03-25 08:45:52 on Problem 3372
In Reply To:优化代码长度 Posted by:textdzy at 2009-03-28 13:54:57
神马数论看不懂啊,,来这里水吧,,,

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