#include <iostream>
#include <string>
#include <cctype>
#include <typeinfo>
#include <cstdlib>
#include <vector>
#include <algorithm>

using namespace std;

int main() {
  int tmp, s=55;

  for(int i = 0;i<9;i++){
    cin >> tmp;
    s = s - tmp;
  }

  cout << s << endl;
  return 0;
}