21 задача

import com.sun.xml.internal.bind.v2.runtime.reflect.opt.Const;

import java.util.Scanner;

public class Main {

    public static void main(String[] args) {


        Scanner scanner =new Scanner(System.in);

          int num=5;
          int num2=10;

          int temp=num;
          num=num2;
          num2=temp;

          System.out.println(num);

        System.out.println(num2);



    }
}