#include <stdio.h>
#include <bits/stdc++.h>
using namespace std;
#define rep(i,n) for (int i = 0; i < (n); ++i)
#define Inf 1000000001


int main(){
	
	long long N;
	cin>>N;
	
	rep(i,60){
		N /= 2;
		if(N==0){
			cout<<(1LL << (i))<<endl;
			break;
		}
	}
	
	return 0;
}