View Code of Problem 1

import java.util.Scanner;

public class Main {
   

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

        while (in.hasNext()) {

            String line=in.nextLine();
            String[] line_arr=line.split(" ");
            Integer a=Integer.valueOf(line_arr[0]) ;
            Integer b=Integer.valueOf(line_arr[1]) ;
            System.out.println(a+b);
        }

    }

}