import java.util.*;

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