c++编程

#include<istream>
#include<map>
using namespace std;
int main(void)
{
    int n;
    while(cin>>n && n)
    {
        map<string,int>balloon;
        string s;
        for(int i=0;i<n;i++)
        {
            cin>>s;
            ballon[s]++;
        }
        int imax=0;
        map<string,int>::iterator point ,loc;
        for(point=balloon.begin();point!=balloon.end();point++)
            if (imax<point->second)
            {
                imax=point->second;
                loc=point;
            }
            cout<<loc->first<<endl;
    }
    return 0;
}