1.
import java.util.*;

public class Main {
	public static void main(String[] args) {
        	Random random = new Random();
        	int[][] t = new int[9][7];
        	int sum = 0;
        	int max3 = 0;
        	for (int i = 0; i < t.length; i++) {
            		for (int j = 0; j < t[i].length; j++) {
                		int r = random.nextInt(1400 + 1) + 100;
                		sum += r;
                		t[i][j] = r;
                		if (i == 2 && r > max3) {
                    			max3 = r;
                		}
            		}
        	}
        	System.out.println(max3);
        	System.out.println(sum / 63);
	}
}

2.
import java.util.*;
import java.lang.*;

public class Main {
	public static void main(String[] args) {
		Scanner scanner = new Scanner(System.in);
		int dot = 0;
		int longest = "";
		for (int i = 0; i < 20; i++) {
			String line = scanner.nextLine();
			if (line.endsWith(".")) dot++;
			if (line.length() > longest) longest = line;
		}
		System.out.println(dot);
		System.out.println(longest);
	}
}

3.
Kaj the fuck so ovijalni razredi? Po anglesko prosim!

4.
private static int samo(String str) {
	return str.toLowerCase().replaceAll("[^aeiou]", "").length();
}