#include <iostream>
using namespace std;

long n;
int main() {
	cin >> n;
	n *= 2;
	for (int i = 1; i <= 2000000000; ++i) {
		long k = (long)i * (i + 1);	
    	if (k >= n) {
        	if (k == n) {
            	cout << "YES" << endl;
            	cout << i << endl;
            } else {
				cout << "NO" << endl;
            }
        	return 0;
        }
    }
}