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=;
 int n;
 int in[N];
 int main()
 {
     while (cin>>n)
     {
         for (int i=;i<*n;i++)
         {
             cin>>in[i];
         }
         sort(in,in+*n);
         if (in[n]>in[n-])
         {
             cout<<"YES"<<endl;//注意YES不要写错！
         }
         else
         {
             cout<<"NO"<<endl;
         }
     }

     return ;
 }