#include <iostream>
#include <cmath>

using namespace std;

int main() {
	long long n;
	cin >> n;

	n *= 2;
	long long sec = sqrt(n);
	bool ok = false;
	while (1) {
		// long long sheep = sec * (sec + 1) / 2;
		long long sheep = sec * (sec + 1);
		if (sheep >= n) {
			ok = sheep == n;
			break;
		}
		sec++;
	}

	if (ok) {
		cout << "YES" << endl;
		cout << sec << endl;
	} else {
		cout << "NO" << endl;
	}

	return 0;
}