import java.util.*;
public class Main{
  	public static void main (String [] args){
     	Scanner sc = new Scanner (System.in);
      	int N = sc.nextInt();
      	int count = 0;
      	for (int i = 0; i <= N; i++){
          	if (i%2 != 0){
          		int factorCount = 0;
              	for (int j = 1; j <= i; j++){
                  	if (i%j==0) factorCount++;
                }
              	if (factorCount == 8) count++;
            }
        }
      	System.out.println(count);
    }
}
/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