codeforces 845A Chess Tourney

 1 #include <iostream>
 2 #include <cstdio>
 3 #include <cstring>
 4 #include <algorithm>
 5 using namespace std;
 6 const int N=210;
 7 int n;
 8 int in[N];
 9 int main()
10 {
11     while (cin>>n)
12     {
13         for (int i=0;i<2*n;i++)
14         {
15             cin>>in[i];
16         }
17         sort(in,in+2*n);
18         if (in[n]>in[n-1])
19         {
20             cout<<"YES"<<endl;//注意YES不要写错！
21         }
22         else
23         {
24             cout<<"NO"<<endl;
25         }
26     }
27 
28     return 0;
29 }