#include <bits/stdc++.h>
using namespace std;
using i64 = long long;
#define rep(i,s,e) for(int (i) = (s);(i) <= (e);(i)++)

i64 n;

int main(){
  cin >> n;
  i64 r = sqrt(1 + 8 * n);
  if(1 + 8 * n == r * r){
    cout << "YES" << endl;
    cout << (1 + r) / 2 - 1 << endl;
  }
  else{
    cout << "NO" << endl;
  }
}