#include <iostream>
#include <fstream>

using namespace std;

int main() {
    ifstream input("adunare.in");
    ofstream output("adunare.out");

    int a = 0, b = 0;

    if (input.is_open()) {
        for (int i = 0; !input.eof(); i++) {
            input >> a;
            b += a;
        }
        input.close();
    } else cout << "Error opening file";

    output << b;
    output.close();
}