#include <iostream>
#include <algorithm>
#include <string>
#include <vector>
#include <map>
#include <set>
#include <stdio.h>
#include <cstring>
#include <queue>
#include <stack>
#include <functional>
#include <math.h>
using namespace std;
#define Would
#define you

int main() {
	long long n, mon;
	cin >> n;
	mon = sqrt(2 * n);
	if (((mon*(1 + mon)) / 2) == n) { cout << "YES" << endl << mon << endl; }
	else { cout << "NO" << endl; }
}