#include <bits/stdc++.h>
using std::cout;
using std::endl;
using std::cin;

long n;

bool check(int t){
	long ret = 0;
	while(t){
		ret += t;
		t >>= 1;
	}
	
	return ret <= n;
}

long binary(){
	long ok = 0, ng = 1e9;
	
	while(abs(ok - ng) > 1){
		long mid = (ok + ng) / 2;
		
		if(check(mid)) ok = mid;
		else ng = mid;
	}
	
	long ret = 0;
	while(ok){
		ret += ok;
		ok >>= 1;
	}

	return ret == n;
}

int main(){
	cin >> n;
	
	if(binary()) cout << "YES" << endl;
	else cout << "NO" << endl;
	return 0;
}