/*
Q: Swap two numbers without using a temporary.

A: You can use either an XOR approach or a combination of additions and subtractions.
*/

#include <iostream>
using namespace std;

void swap(int &a, int &b) {
  a = a ^ b;
  b = a ^ b;
  a = a ^ b;
}

int main() {
  int a = 5, b = 10;
  cout << "a: " << a << endl;
  cout << "b: " << b << endl;
  swap(a, b);
  cout << "New a: " << a << endl;
  cout << "New b: " << b << endl;
  return 0;
}