import java.io.*;
import java.util.*;

public class Main {

	public static void main(String[] args) {
		Scanner in = new Scanner(System.in);
		
		int n = in.nextInt();
		int maxCount = 0;
		int maxN = 1;
		
		for(int i = 1; i <= n; i++){
			int count = 0;
			int tmp = i;
			while(tmp%2 == 0){
				tmp /= 2;
				count++;
			}
			if(count > maxCount){
				maxCount = count;
				maxN = i;
			}
		}
		
		System.out.println(maxN);

	}

}

/tmp/hf-datasets-cache/medium/datasets/42704881117311-config-parquet-and-info-qiankunmu-Project_CodeNet-896c9d36/hub/datasets--qiankunmu--Project_CodeNet_Python800_and_Java250/snapshots/c899fde44a77ba1cc14973ed3de064e4ff3aadc7/Project_CodeNet_Java250.tar.gz