#include <iostream>
#include <fstream>
#include <string>
using namespace std;

int main () {
  string line;
  ifstream f("adunare.in");
  ofstream g ("adunare.out");
    int sum=0;
    int x;
    f>>x;
  if (f.good())
  {
    while ( getline (f,line) )
    {
        sum = sum+x;
        f>>x;

    }
    g<<sum<<"\n";

    f.close();
    g.close();
  }

  return 0;
}