[CODE] - Matriz Caracol

//By Willian Luigi

import java.util.*;

class Caracol {
    public static void main(String[] args) {
        Scanner inp = new Scanner(System.in);

        int n = inp.nextInt();
        int[][] caracol = new int[n][n];

        int
            x = 0,
            y = 0,
            px = 0,
            py = 0
        ;

        for (int i = 0; i < n * n + 1; ++i) {
            caracol[y][x] = i;

            x += px;
            y += py;

            if (caracol[y][x] != 0) {
                if (px == 1) {
                    px = 0;
                    py = 1;
                    x -= 1;
                    y += 1;
                }
                else if (px == -1) {
                    px = 0;
                    py = -1;
                    x += 1;
                    y -= 1;
                }
                else if (py == 1) {
                    px = -1;
                    py = 0;
                    x -= 1;
                    y -= 1;
                }
                else if (py == -1) {
                    px = 1;
                    py = 0;
                    x += 1;
                    y += 1;
                }
            }
            if (x == 0 && y == 0) {
                px = 1;
                py = 0;
            }
            else if (x == 0 && y == n - 1) {
                px = 0;
                py = -1;
            }
            if (x == n - 1 && y == n - 1) {
                px = -1;
                py = 0;
            }
            else if (x == n - 1) {
                px = 0;
                py = 1;
            }
        }
        System.out.printf("\n\n\n\n");
        for (int i = 0; i < n; ++i) {
            for (int j = 0; j < n; ++j) {
                System.out.printf("%d\t", caracol[i][j]);
            }
            System.out.println("");
        }
    }
}