import java.util.*;

public class Main {
  public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
    int N = sc.nextInt();
    int max = 0;
    int cnt = 0;
    int ans = 1;
    int A = 0;
    for (int i = 1; i <= N; i++) {
      cnt = 0;
      A = i;
      while (A % 2 == 0) {
        A = A / 2;
        cnt++;
      }
      if (cnt > max) {
        ans = i;
        max = cnt;
      }
    }
    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