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 ans = 1;
		
    for(int i = 1; i <= N; i++) {
      int count = 0;
      int temp = i;
			
      while(true) {
        if(temp%2 == 0) {
          temp = temp/2;
          count++;
        }else {
          break;
        }
      }
      if(count > max) {
        max = 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