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

ll game(ll x) {
  ll ret = 0;
  while(x>0) {
    ret += x;
    x/=2;
  }
  return ret;
}

int main() {
  ll n;
  cin >> n;
  if(n==0) {
    cout << "YES" << endl;
    return 0;
  }
  ll ok = 1;
  ll ng = 10000000001L;
  while(abs(ok-ng)>1) {
    ll test = (ok+ng)/2;
    if(game(test)<=n) {
      ok = test;
    } else {
      ng = test;
    }
  }
  if(game(ok)==n) {
    cout << "YES" << endl;
  } else {
    cout << "NO" << endl;
  }
  return 0;
}