#include <bits/stdc++.h>
using namespace std;

int main () {
	int n, c1 = 0, c2 = 0;
	cin >> n;
	while (n--) {
		int t;
		cin >> t;
		if (t == 10) {
			c1++;
		} else {
			c2++;
		}
	}
	if (c1 > c2) {
		cout << 10;
	} else {
		cout << 20;
	}
	
}

#include <bits/stdc++.h>
using namespace std;

int main () {
	int n, c1 = 0, c2 = 0;
	cin >> n;
	while (n--) {
		int t;
		cin >> t;
		if (t == 10) {
			c1++;
		} else {
			c2++;
		}
	}
	if (c1 > c2) {
		cout << 10;
	} else {
		cout << 20;
	}
	
}

#include<iostream>
using namespace std;
int main()
{
    int n;
    int a[100];
    cin>>n;
    for(int i=1;i<=n;i++){
        cin>>a[i];
    }
    int c1=0;
    int c2=0;
    for(int i=1;i<=n;i++){
        if(a[i]==10){
            c1++;
        }else{
            c2++;
        }
    }
    if(c1>c2){
        cout<<10;
    }else{
        cout<<20;
    }
    return 0;
}