#include "bits/stdc++.h"
using namespace std;
typedef long long ll;
void Say(bool say, string a = "Yes", string b = "No"){cout << (say ? a : b) << endl;};

int main(){
    
    ll N;
    cin >> N;
    ll P = 1 + 8 * N;
    ll p = sqrt(P);
    if(p * p != P){
        cout << "NO" << endl;
        return 0;
    }
    cout << "YES" << endl;
    cout << (p - 1) / 2 << endl;


    return 0;
}