#include <iostream>
#include <vector>
#define rep(i,n) for (int i=0; i < (int)(n); i++)
using namespace std;
using ll = long long;

int main()
{
  ll a;
  cin >> a;
  ll sum = 3;
  for(ll i=3; i<101010; i++)
  {
    if(sum > a) break;
    if((a - sum) % i == 0)
    {
      cout << "YES" << endl;
      return 0;
    }
    sum += i;
  }
  cout << "NO" << endl;
  return 0;
}