#include <stdio.h>
int main(void)
{
    int a,b;
    while(scanf("%d%d", &a,&b) != EOF)
        printf("%d\n",a+b);
    return 0;
}

#include <iostream>
using namespace std;
int main(void)
{
    int a,b;
    while(cin >> a>>b)
        cout << a+b<<endl;
    return 0;
}

Here is a sample solution for problem 1000 using Java:

import java.util.Scanner;
public class Main {
 public static void main(String[] args) {
  Scanner in = new Scanner(System.in);
  while (in.hasNextInt()) {
   int a = in.nextInt();
   int b = in.nextInt();
   System.out.println(a + b);
  }
 }
}