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换了三个方法,用最简单的方法AC了,贴码让后来者参考一下

Posted by ky163 at 2009-11-05 21:13:21 on Problem 1007
#include<iostream>
#include<string>
#include<vector>
using namespace std;
struct PAIR
{
	string s;
	long int count;
};
void sort_vector(vector<PAIR>&pp)
{
	PAIR temp;
	for(vector<PAIR>::size_type a=0;a!=pp.size();a++)
	{
		for(vector<PAIR>::size_type b=a+1;b!=pp.size();b++)
		{
			if(pp[a].count>pp[b].count)
			{
				temp=pp[a];
				pp[a]=pp[b];
				pp[b]=temp;
			}
		}
	}
}
int main()
{
	int n,m,i,k;
	string str;
	
	while(cin>>n>>m&&n<=50&&m<=100)
	{
		vector<PAIR> pair;
		for(i=0;i!=m;i++)
		{
			cin>>str;
			k=0;
			for(string::size_type a=0;a!=n-1;a++)
			{
				for(string::size_type b=a+1;b!=n;b++)
				{
					if(str[a]>str[b])k++;
				}
			}
			str[n]='\0';
			PAIR p={str,k};
			pair.push_back(p);
		}
		sort_vector(pair);
		for(vector<PAIR>::size_type a=0;a!=pair.size();a++)
		{
			cout<<pair[a].s<<endl;
		}
	}
}



这里要注意的一个问题是:假如两个输入的字符串逆序数相同,就不改动它们的位置。之前用
map<int,string>的时候,就因为这个WA了.

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