import java.io.File;
import java.io.FileWriter;
import java.io.Writer;
import java.util.Scanner;

public class Adunare {
    public static void main(String[] args) throws Exception {
        Scanner read = new Scanner(new File("adunare.in"));
        Writer write = new FileWriter("adunare.out");
        int i = 0;
        while(read.hasNextInt())
        {
            i += read.nextInt();
        }
        write.write(String.valueOf(i));
        read.close();
        write.close();
    }
}