#include <iostream>
#include <vector>
#include <string>
#include <algorithm>
#include <cstdio>
#include <cstring>
#include <cmath>
using namespace std;

int main() {
    int s = 55;
    for (int i = 0; i < 9; i++) {
        int b;
        cin >> b;
        s -= b;
    }
    cout << s << endl;

    return 0;
}