package javaapplication112;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.Locale;

public class JavaApplication112 {

    public static void main(String[] args) throws IOException, Exception {
        BufferedReader in = new BufferedReader(new InputStreamReader(System.in));

        // Zadanie 1
        /*
        String inputLine = in.readLine();

        String []ds = inputLine.trim().split("[ \t]+");
        double r1 = Double.parseDouble(ds[0]);
        double r2 = Double.parseDouble(ds[ds.length - 1]);

        System.out.printf(Locale.US, "r1=%g r2=%g\n", r1, r2);
        System.out.printf(Locale.US, "r1+r2=%g\n", r1 + r2);
        */

        // Zadanie 2
        /*
        String inputLine = in.readLine();

        String []ds = inputLine.trim().split("[ \t]+");
        double sum = 0.0;

        for (String str : ds) {
            if (str.isEmpty()) continue;
            sum += Double.parseDouble(str);
        }

        System.out.printf(Locale.US, "sum=%g\n", sum);
        */

        // Zadanie 3
        /*
        String imieRegex = ".*(?i)bartek.*";
        String imie2Regex = ".*(?i)bart[l≥]omiej.*";

        String inputLine = in.readLine();

        if (inputLine.matches(imieRegex) || inputLine.matches(imie2Regex)) {
            System.out.println(inputLine);
        }
        */

        // Zadanie 4
        /*
        String regex = "[ \t,-.?!\\(\\);\"\':\\[\\]]+";
        int slowa = in.readLine().trim().split(regex).length;
        System.out.println(slowa);
        */

        // Zadanie 5
        /*
        String inputLine = in.readLine().trim();
        String regex = "([0-2]?[0-9]|3[0-1])\\.(0?[0-9]|1[0-2])\\.[0-9]+";

        if (inputLine.matches(regex)) {
            System.out.println("Poprawna data");
        }

        assert !"12,12,12".matches(regex);
        assert !"2.10.".matches(regex);
        assert !"120.120.123".matches(regex);
        assert !"nic".matches(regex);
        assert !"127.0.0.1".matches(regex);
        assert !"32.9.2019".matches(regex);
        assert !"30.13.2019".matches(regex);
        assert "1.12.2019".matches(regex);
        assert "1.1.2019".matches(regex);
        assert "01.1.2019".matches(regex);
        assert "01.01.2019".matches(regex);
        */

        // Zadanie 6
        /*
        System.out.print("Podaj s≥owo: ");
        String slowo = in.readLine();

        if (slowo.matches(".*[ \t]+.*")) {
            throw new Exception("Z≥e s≥owo");
        }

        String regex = ".*(?i)" + slowo + ".*";
        String linia = in.readLine();

        if (linia.matches(regex)) {
            System.out.println(linia);
        }

        if (linia.contains(slowo)) {
            System.out.println(linia);
        }
        */

        // Zadanie 7

        /*
        int lessThan20 = 0;
        int counter = 0;

        while (lessThan20 < 10 && counter < 100) {
            long randomNum = Math.round(Math.random() * 100);

            if (randomNum < 20) {
                System.out.println(randomNum);
                lessThan20++;
            }

            counter++;
        }
        */

        // Zadanie 8
        int [][]tablica = {
            { 10 },
            { 12, 14 },
            { 16, 18, 20 },
            { 22, 24, 26, 28 },
            { 30, 32, 34, 36, 38 },
        };

        for (int i = 0; i < tablica.length; i++) {
            for (int j = 0; j < tablica[i].length; j++) {
                System.out.print(tablica[i][j] + " ");
            }

            System.out.println();
        }

        // Zadanie 9
    }

}