package com.yeliseyenka.lesson2;

import java.util.Scanner;

public class Test2 {
    public static void main(String[] args) {

        Scanner scanner = new Scanner(System.in);
        int i;
        int sum = 0;

        i = scanner.nextInt();

        if (i > 0) {
            sum += i;
        }


        i = scanner.nextInt();

        if (i > 0) {
            sum += i;
        }


        i = scanner.nextInt();

        if (i > 0) {
            sum += i;
        }


        System.out.println(sum);
    }
}