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Re:求助,老是Wrong Answer

Posted by mThunder at 2007-11-22 14:36:48 on Problem 1007
In Reply To:求助,老是Wrong Answer Posted by:pkuusb at 2007-11-22 12:46:34
> 以下是小弟1007的代码,其中用到了STL qsort排序函数,其本思想是通过该函数实现字符串按inversion值从小到大排序,可怎么老出是Wrong Answer呢?
> 
> #include<iostream>
> #include<algorithm>
> using namespace std;
> int inversion(const char* s)
> {
> 	int n=strlen(s);
> 	int result=0;
> 	for(int i=0;i<n;i++)
> 		for(int j=i+1;j<n;j++)
> 			if(s[i]>s[j]) result++;
> 	return result;
> }
> int compare(const void* s1,const void* s2)
> {
> 	if(inversion((char*)s1)>=inversion((char*)s2)) return true;
> 	else return false;
> }
> 
> int main()
> {
> 	char input[100][50];
> 	int n,m,i;
> 	scanf("%d%d",&n,&m);
> 	for(i=0;i<m;i++){
> 		scanf("%s",input[i]);
> 	}
> 	qsort((void*)input,m,sizeof(input[0]),compare);
> 	for(i=0;i<m;i++)
> 		printf("%s\n",input[i]);
> 	return 0;
> }
//
排序用stable_sort吧

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