#include<iostream>
#include <fstream>
#include <cstdlib>

using namespace std;


int main()
{

	ifstream radu("adunare.in");
	ofstream result("adunare.out");

	if (!radu.is_open() || !result.is_open()) {
		exit(EXIT_FAILURE);
	}

	int word;
	int sum = 0;
	while (radu >> word) {
		sum += word;
	}
	if (sum >= 2000000000) {
		exit(EXIT_FAILURE);
	}
	else {
		result << sum;
	}


	system("pause");
	return 0;
}