import java.net.URL;
import java.net.URLConnection;
import java.util.ArrayList;
import java.util.List;
import java.util.Scanner;

public class Main {

    static List<String> list = new ArrayList<>();
    static int co = 0;
    public static void main(String[] args) {

        String content = null;
        List<String> array = new ArrayList<>();
        URLConnection connection = null;
        long start = System.currentTimeMillis();
        try {
            connection = new URL("https://hse.ru").openConnection();
            Scanner scanner = new Scanner(connection.getInputStream());
            scanner.useDelimiter("\\Z");
            content = scanner.next();
            scanner.close();
        } catch (Exception ex) {
            ex.printStackTrace();
        }
        StringBuilder stringBuilder = new StringBuilder(content);
        //System.out.println(content);
        //qwe(stringBuilder);
        findURL(stringBuilder);

        StringBuilder str = new StringBuilder("tfoygf2 ==jhv 12 gfvjvl 123 gpg 12 dfjkvbhe 12 md fkb1122 mncb1 2n  bphbp12    kjb1 12");
        //qwee(str);
        System.out.println(list.size());
    }

    static void qwe(StringBuilder stringBuilder){

        int i = stringBuilder.indexOf("</section>");
        do{
            stringBuilder = stringBuilder.delete(0,i+10);
            i = stringBuilder.indexOf("</section>");

        }while (i!=-1);
    }
    static void qwee(StringBuilder stringBuilder){

        int i = stringBuilder.indexOf("12");
        do{
            stringBuilder = stringBuilder.delete(0,i+2);
            i = stringBuilder.indexOf("12");

        }while (i!=-1);
    }

    static void findURL(StringBuilder stringBuilder){
        int i;
        do{
        i = stringBuilder.indexOf("a href=\"");
        i+=8;
        int j = i;
        do{
            j++;
        }while (stringBuilder.charAt(j)!='\"');
        String str = stringBuilder.substring(i,j);
        list.add(str);
        stringBuilder = stringBuilder.delete(0,i + 8 + j);
        }while (i!=-1);
    }

}