#include<iostream>
#include<string>
#include<algorithm>
#include<cctype>
#include<set>
#include<bitset>
#include<math.h>
#include<map>
#include<queue>
#include<iomanip>
using namespace std;

int main(){
    int n, t, sum1 = 0;
    cin >> n;
    for (int i = 0; i < n - 1; i++){
        cin >> t;
        sum1 += t;
    }
    if (!(sum1%n) || !((sum1%n + 100)%n)) cout << 100/n + 1 << endl;
    else cout << (sum1%n + 100)/n << endl;
}