#define _USE_MATH_DEFINES
#define _CRT_SECURE_NO_WARNINGS
#include<stdio.h>
#include<string>
#include<iostream>
#include<iostream>
#include<cctype>
#include<cstdio>
#include<vector>
#include<stack>
#include<queue>
#include <algorithm>
#include<math.h>
#include<set>
#include<map>
#include <sstream>
#include<iomanip>
#include <ctype.h>
using namespace std;

//#include<bits/stdc++.h>


int main() {

	long long int n, m;
	cin >> n;
	m = sqrt(2 * n);
	if (m*(m + 1) / 2 == n)cout << "YES" << endl << m << endl;
	else cout << "NO" << endl;
		
	return 0;
}