/* -*- coding: utf-8 -*-
 *
 * 680.cc: No.680 作れる数 - yukicoder
 */

#include<cstdio>
#include<cstdlib>
#include<cstring>
#include<cmath>
#include<iostream>
#include<string>
#include<vector>
#include<map>
#include<set>
#include<stack>
#include<list>
#include<queue>
#include<deque>
#include<algorithm>
#include<numeric>
#include<utility>
#include<complex>
#include<functional>
 
using namespace std;

/* constant */

const int MAX_T = 500000010;

/* typedef */

/* global variables */

/* subroutines */

inline int calc_s(int t) {
  int s = 0;
  while (t) {
    s += t;
    t >>= 1;
  }
  return s;
}

/* main */

int main() {
  int n;
  scanf("%d", &n);

  int t0 = 0, t1 = MAX_T;
  while (t0 + 1 < t1) {
    int t = (t0 + t1) / 2;
    if (calc_s(t) > n) t1 = t;
    else t0 = t;
  }

  if (calc_s(t0) == n) puts("YES");
  else puts("NO");
  return 0;
}