import java.io.*;
class Main {
 public static void main(String[] args) throws IOException{
	try ( BufferedReader br = new BufferedReader(new InputStreamReader(System.in)) ){
		final int target = Integer.parseInt( br.readLine() );
		int counter = 0;

		for( int i = 3; i <= target; i+=2 ){
			int tmpCnt = 0;
			for( int j = 1 ; j <= i ; j+=2 ){
				if( i%j == 0 ){
					tmpCnt++;	
				}
			}
//			System.out.println(i + ", " +tmpCnt);
			if( tmpCnt == 8 ){
				counter++;
			}
		}

		System.out.println(counter);

	}


 }
}
/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