import java.util.Scanner;

public class Main {
    public static void main (String[] args) {
        Scanner sc = new Scanner(System.in);

        int n = sc.nextInt();
        int ans = 0;
        int ans_cnt = -1;
        for (int i = 1; i <= n; i++) {
            int tmp = i;
            int cnt = 0;
            while (true) {
                if (tmp % 2 == 0) {
                    cnt++;
                } else {
                    break;
                }
                tmp /= 2;
            }
            if (ans_cnt < cnt) {
                ans_cnt = cnt;
                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