P02Python

package Exams.Exam26June2021;

import java.util.Scanner;

public class P02Python {
    private static int row;
    private static int col;
    private static int food;
    private static int length;

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

        length = 1;

        int n = Integer.parseInt(scanner.nextLine());

        String[] commands = scanner.nextLine().split(", ");

        char[][] screen = fillScreen(n, scanner);

        boolean steppedOnEnemy = false;

        for (String command : commands) {
            switch (command) {
                case "up":
                    if (row - 1 < 0) {
                        row = n - 1;
                    } else {
                        row--;
                    }
                    break;
                case "down":
                    if (row + 1 > n - 1) {
                        row = 0;
                    } else {
                        row++;
                    }
                    break;
                case "left":
                    if (col - 1 < 0) {
                        col = n - 1;
                    } else {
                        col--;
                    }
                    break;
                case "right":
                    if (col + 1 > n - 1) {
                        col = 0;
                    } else {
                        col++;
                    }
                    break;
            }

            if (screen[row][col] == 'e') {
                steppedOnEnemy = true;
            } else if (screen[row][col] == 'f') {
                length++;
                food--;
            }

            if (food == 0 || steppedOnEnemy) {
                break;
            }
        }

        if (food == 0) {
            System.out.printf("You win! Final python length is %d%n", length);
        } else if (steppedOnEnemy) {
            System.out.println("You lose! Killed by an enemy!");
        } else {
            System.out.printf("You lose! There is still %d food to be eaten.%n", food);

        }
    }



    private static char[][] fillScreen(int n, Scanner scanner) {
        char[][] screen = new char[n][n];
        for (int r = 0; r < screen.length; r++) {
            String input = scanner.nextLine().replaceAll(" ", "");
            for (int c = 0; c < screen[r].length; c++) {
                if (input.charAt(c) == 's') {
                    row = r;
                    col = c;
                } else if (input.charAt(c) == 'f') {
                    food++;
                }
                screen[r][c] = input.charAt(c);
            }
        }

        return screen;
    }
}