#include <bits/stdc++.h>
#include<iostream>
#include<iomanip>
#include<string>
#include<algorithm>
#include<vector>
#include<set>
#include<list>
#include<queue>
#include<math.h>
#include<bitset>
using ll = long long;
using namespace std;

int main(){
    int n, sum1 = 0;
    cin >> n;
    vector<int> v(n);
    for (int i = 0; i < n; i++) cin >> v[i];
    for (int i = 1; i <= 100; i++){
        double sum1 = 0;
        for (int j = 0; j < n; j++){
            sum1 += i*v[j]/100;
        }
        if (sum1 == i) {
            cout << i << endl;
            return 0;
        }
    }
}