Geeksforgeeks Solution For " Swap two numbers "

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Problem :- Swap given two numbers and print them. (Try to do it without a temporary variable.)

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Solution :- 

#include <iostream>
using namespace std;
int main()
{
    int t;
    cin>>t;
    while(t--)
    {
    int a,b;
    cin>>a>>b;
    a=a+b;
    b=a-b;
    a=a-b;
    
    cout<<a<<" "<<b<<endl;
    }
    return 0;
}

Output:-