[백준] 10952번

import java.util.Scanner;

public class Main {
   public static void main(String[] args) {
      Scanner sc = new Scanner(System.in);

      while (true) {
         int x = sc.nextInt();
         int y = sc.nextInt();
         if (x == 0 && y == 0) break;   // 입력받은 두 값이 0이면 탈출
         System.out.println(x + y);
      }
   }
}