import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		// TODO 自動生成されたメソッド・スタブ
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		sc.close();

		int count = 0;
		int ans = 1;
		for(int i=1;i<=n;i++){
			int count1 = 0;
			int tmp = i;
			while(tmp%2==0) {
				tmp = tmp/2;
				count1 = count1+1;
			}
			if(count1>count) {
				count = count1;
				ans = i;
			}
		}
		System.out.println(ans);
	}
}
/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