#include <iostream>
using namespace std;
const long long INF = 3000000000;
int main(){
	long long n;
	cin >> n;
	long long tv = INF;
	long long fv = 0;
	while (tv - fv > 1){
		long long mid = (tv + fv) / 2;
		if (mid * (mid + 1) / 2 >= n){
			tv = mid;
		} else {
			fv = mid;
		}
	}
	if (tv * (tv + 1) / 2 == n){
		cout << "YES" << endl;
		cout << tv << endl;
	} else {
		cout << "NO" << endl;
	}
}