import java.util.*;
import java.io.*;

class ReadIntegers {
    public static void main(String[] args) throws IOException {
        Reader filein = new BufferedReader( new FileReader("numbers.txt") );
        Scanner scanfile = new Scanner(filein);
        int total = 0;
            
        while ( scanfile.hasNextInt() ) {
            total += scanfile.nextInt();
        }
        System.out.println(total);
        
    }
}