#include <iostream>
using namespace std;

int main()
{
	int a;
	int b;
	int c;
	int N;

	cin >> N;

	b = 1;
	c = 1;

	for (a = 1; a <= b;a++) {
		for (b = 1; b <= c;b++) {
			c = N - (b + a);
			if (a <= b && b<=c) {
				cout << a << " " << b << " " << c << endl;
			}
		}
	}

}