HDU - 1004 Let the Balloon Rise

https://vjudge.net/problem/HDU-1004

#include<iostream>
#include<algorithm>
#include<cstring>
#include<cstdio>
#include<unordered_set>
#include<set>
#include<unordered_map>
using namespace std;
int main()
{
	int n;
	while(cin>>n)
	{
		if(n==0)
			break;
		unordered_map<string,int> q;
		string s;
		for(int i=0;i<n;i++)
		{
			cin>>s;
			q[s]++;
		}
		int ma=0;
		string ans;
		for(auto i:q)
		{
			if(i.second>ma)
			{
				ma=i.second;
				ans=i.first;
			}
		}
		cout<<ans<<"\n";
	}
	return 0;
}