obrni cetvorocifren broj

#include <iostream>
using namespace std;

int main()
{
	int num;
	cin >> num;

	int x1 = num / 1 % 10;
	int x2 = num / 10 % 10;
	int x3 = num / 100 % 10;
	int x4 = num / 1000 % 10;


	cout << x1 * 1000 + x2 * 100 + x3 * 10 + x4 * 1;

}