#include <iostream>
using namespace std;

int main(){
  long long n;
  cin >> n;
  int count = 1;
  while(n>0){
    n -= count;
    count++;
  }
  if(n==0){
    cout << "YES" << '\n';
    cout << count - 1 << '\n';
  }
  else{
    cout << "NO" << '\n';
  }
  return 0;
}