#include<iostream>
#include<stdio.h>
using namespace std;
int main (){
    long long int n,sum=0;
    cin >> n;
    for(int i=0; sum <= n; i++){
        sum += i;
        if( sum == n ) {
            cout << "YES" << endl;
            cout << i << endl;
            return 0;
        }
    }
    cout << "NO" << endl;
    return 0;
}