Swap the integers

Given two Integer numbers A and B. Swap the values of A nad B.

*Hint: Try to solve them using different logics. There is 8 Possible ways to implement this 1. Using 3rd variable

1. Using Additon Operator
2. Using Multiplicaton Operator
3. Without using 3rd variable
4. Using XOR operator
5. Using single statement and Many more .....

Input Format

First line contains No of test cases T

Next followed T lines each line contains two space seperated values.

Constraints

1<= T <= 100

1<= A, B <= 9000

Output Format

Print the values of A & B after applying swapping.

Sample Input 0

5
1 2
3 5
10 34
23 43
100 1

Sample Output 0

2 1
5 3
34 10
43 23
1 100

Sample Input 1

1
99 1987

Sample Output 1

1987 99

Source Code:

import java.io.*;
import java.util.*;

public class Solution {

    public static void main(String[] args) {
        Scanner ik=new Scanner(System.in);
            int n=ik.nextInt();
        for(int i=0;i<=n;i++)
        {
            int a=ik.nextInt();
            int b=ik.nextInt();
            a = a + b;
            b = a - b;
            a = a - b;
            System.out.println(a+" "+b);
         }
         
     
    }
}