Untitled

#include <iostream>
using namespace std;
int main()
{
	int a;
	cin >> a; 
	if (a % 2 == 0)
	{
		for (a; a > 0; a -= 2)
		{
			cout << a;
			cout << " , ";
		}

	}
	if (a % 2 > 0 )
	{
		a -= 1;
		for (a; a > 0; a -= 2)
		{
			cout << a;
			cout << " , ";
		}
		
	}
	cout << 0;
	return 0;
}