import java.util.*;
public class Main{
	static int EightDivsJudge(int k){
		int num = 0;
		for(int i=1; i<=((k+1)/2)*2 - 1; i+=2){
			int count = 0;
			for(int j=1; j<=i; j++){
				if(i%j==0)count++;
			}
			if(count==8)num++;
		}
		return num;
	}

	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		System.out.println(EightDivsJudge(n));
	}
}
/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