#include <iostream>
#include <fstream>

using namespace std;

int main() {

	// open file for input
	ifstream fin("temp.txt");

	int j, sum;
	sum = 0;
	
	while (fin >> j) {
	  sum = sum + j;        
	}

	cout << "sum is : " << sum << endl;
	return 0;
}