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这是为什么啊,两个一样的,一个ac,一个WA?? 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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