codeforces 845A Chess Tourney

参考：https://blog.csdn.net/zhongyuchen/article/details/77478039

#include <iostream>
#include <cstdio>
#include <cstring>
#include <algorithm>
using namespace std;
const int N=210;
int n;
int in[N];
int main()
{
    while (cin>>n)
    {
        for (int i=0;i<2*n;i++)
        {
            cin>>in[i];
        }
        sort(in,in+2*n);
        if (in[n]>in[n-1])
        {
            cout<<"YES"<<endl;//注意YES不要写错！
        }
        else
        {
            cout<<"NO"<<endl;
        }
    }

    return 0;
}