swap without third variable

Description:

Write a program to swap value of two variables without using third variable Test Case 1 Input (stdin) 5 3 Expected Output 3 5 Test Case 2 Input (stdin) 7 3 Expected Output 3 7

Program :

#include <iostream>

using namespace std;

int main()

{

int a,b;

  cin>>a>>b;

  cout<<b<<" "<<a;

return 0;

}