lcm-factorial.cpp

int factorial(int x) {
	if (x == 0 || x == 1)
	{
		return 1;
	}
	return (x * factorial(x - 1));
}
int hcf(int x, int y) {
	if (x == y)
		return x;
	int small = (x < y) ? x : y, res = 1;
	for (int i = 1; i <= small; i++) {
		if (x % i == 0 && y % i == 0) {
			res = i;
		}
	}
	return res;
}
int lcm(int x, int y, int z) {
	int lcm;
	lcm = x * y / hcf(x, y);
	return lcm * z / hcf(lcm, z);

}

void main() {
	int x, y, z;
	cin >> x >> y >> z;
	x = factorial(x);
	y = factorial(y);
	z = factorial(z);
	cout << lcm(x, y, z);
}