#include<bits/stdc++.h>
using namespace std;
typedef long long ll;

signed main(){
    ios::sync_with_stdio(false);
	cin.tie(0);
 
    ll n;
    cin>>n;
    ll now=0;
    n*=2;
    ll t=sqrt(n);
    if(t*(t+1)==n){
        cout<<"YES"<<endl;
        cout<<t<<endl;
    }
    else cout<<"NO"<<endl;
}