#include <bits/stdc++.h>

using namespace std;

typedef long long LL;
typedef vector<int> VI;
typedef pair<int, int> PI;

int main() {
	LL n;
	cin >> n;
	bool bo = false;
	LL a = sqrt(2 * n);
	if (2 * n == a * (a + 1))
		bo = true;
	if (bo) {
		cout << "YES" << endl;
		cout << a << endl;
	}
	else {
		cout << "NO" << endl;
	}
	return 0;
}