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这是为什么啊,两个一样的,一个ac,一个WA??

Posted by xtu723 at 2007-08-12 16:11:50 on Problem 1552
		sort(s,s+i-1);
//		 printf("s[i-1]===%d\n",s[i-1]);
		num=0;
		for(j=1;j<i;j++)
		{
			for(k=0;k<j;k++)
				if(s[j]==s[k]*2)  num++;
		}
上面是排序之后找,WA
		num=0;
		for(j=0;j<i;j++)
		{
			for(k=0;k<i;k++)
				if(s[j]==s[k]*2)  num++;
		}
上面不排序直接找,AC
两个有什么不同?

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