#include<iostream>
#include<algorithm>
#include <vector>
#include<cmath>
using namespace std;
typedef long long int lont;
int main() {
	vector<int>vec(9);
	for (int ia = 0; ia < 9; ia++) {
		cin >> vec.at(ia);
	}
	int sum = 0;
	for (int ib = 0; ib < 9; ib++) {
		sum += vec.at(ib);
	}
	cout << 55 - sum << endl;
}