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

int main() {
  unsigned long long n;
  cin>>n;
  long long x = sqrt(1 + 8 * n);
  if (x * x != 1 + 8 * n) {
    cout<<"NO"<<endl;
    return 0;
  }
  cout<<"YES"<<endl;
  cout<<(-1 + x) / 2<<endl;
}