#include <iostream>
#include <stdio.h>
#include <stdlib.h>
using namespace std;

int main(void)
{
    long long  sheep = 0;
    long n;
    cin >> n;

    for(long long i = 1; ; i++)
    {
        sheep += i;
        if(sheep == n)
        {
            cout << "YES" << endl << i << endl;
            return 0;
        }
        else if(sheep > n)
        {
            cout << "NO" << endl;
            return 0;
        }
    }

}