import java.util.Scanner;

public class Third {

    public static void main(String[] args) {
        int firstNameLength = GetNameLength();

        double[][] table = MakeTable(firstNameLength);

        System.out.println();
        System.out.println();

        GetMinimumValueFromFirstDiagonal(table);
    }

    public static double GenerateRandom() {
        return Math.random() * 10;
    }

    public static int GetNameLength() {
        String name;
        Scanner scanner = new Scanner(System.in);

        do {
            System.out.println("Podaj imie (dluzsze od 4)");
            name = scanner.nextLine();
        }
        while (name.length() < 4);

        return name.length();
    }

    public static double[][] MakeTable(int size) {
        double[][] table = new double[size][size];

        for (int i=0;i<size;i++) {
            for (int j=0;j<size;j++) {
                table[i][j] = Math.round((Math.random() * 1) * 100.0) / 100.0;
                System.out.print(table[i][j] + " ");
            }
            System.out.println();
        }

        return table;
    }

    public static void GetMinimumValueFromFirstDiagonal(double[][] table) {
        double temp = 0;

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

        for (int j=table[0].length -1; j>=0 ;j--) {
            System.out.print(table[j][j] + " ");
        }
    }


}