spiralMatrix

import java.util.Scanner;

    public class Main{
        public static void main(String[] args) {
            Scanner scanner = new Scanner(System.in);
            String input = scanner.nextLine();

            int n = Integer.parseInt(input);
            int[][] matrix = new int[n][n];

            int i = 1;
            int topBorder = 0;
            int rightBorder = n - 1;
            int bottomBorder = n - 1;
            int leftBorder = 0;

            while (i <= n * n) {
                for (int j = leftBorder; j <= rightBorder; j++) {
                    matrix[topBorder][j] = i;
                    i++;
                }
                topBorder++;

                for (int j = topBorder; j <= bottomBorder; j++) {
                    matrix[j][rightBorder] = i;
                    i++;
                }
                rightBorder--;

                for (int j = rightBorder; j >= leftBorder; j--) {
                    matrix[bottomBorder][j] = i;
                    i++;
                }
                bottomBorder--;

                for (int j = bottomBorder; j >= topBorder; j--) {
                    matrix[j][leftBorder] = i;
                    i++;
                }
                leftBorder++;
            }

            for (int[] row : matrix) {
                for (int cell : row) {
                    System.out.printf("%d ", cell);
                }
                System.out.println();
            }
        }
    }