#include <bits/stdc++.h>
using namespace std;
int main(){
  vector<int> B(9);
  for (int i = 0; i < 9; i++){
    cin >> B[i];
  }
  int sum = 0;
  for (int i = 0; i < 9; i++){
    sum += B[i];
  }
  cout << 55 - sum << endl;
}