#include <bits/stdc++.h> using namespace std; int main() { int n,sum = 0,temp = 0; cin>>n; int a[10010]; for(int i = 1;i <= n;i++) { cin>>a[i]; } for(int i = 1;i <= n;i++) { if(a[i] == 10) { sum++; } else if(a[i] == 20) { temp++; } } if(sum > temp) { cout<<10<<endl; } else { cout<<20<<endl; } return 0; }