#include <bits/stdc++.h>
using namespace std;
int main(){
  int A;
  cin >> A;
  A *= 2;
  vector<int> f;
  for (int i = 1; i * i <= A; i++){
    if (A % i == 0){
      f.push_back(i);
      f.push_back(A / i);
    }
  }
  bool ok = false;
  for (int x : f){
    int y = A / x - 1;
    if (x % 2 == y % 2 && y >= 3){
      ok = true;
    }
    //r+l=x
    //r-l=y
  }
  if (ok){
    cout << "YES" << endl;
  } else {
    cout << "NO" << endl;
  }
}