題目要求

P1205題目鏈接

分析

每一種變換都很麻煩，不好推，我選擇把每一個封裝成單獨的函數，并且為了變換5對變換1、2、3的復用而調整了參數和返回值。

具體的每種變換可以看具體的函數實現，很清楚的。

怎么推我也不太會，我覺得就可以表下標$[i,j]$，找規律，然后瘋狂debug……我找了大概一個半小時……

AC代碼（Java語言描述）

import java.util.Arrays; import java.util.Scanner;public class Main {private static char[][] chars1, chars2;private static int num;private static boolean judge1(char[][] chars1) {char[][] newChars = new char[num][num];for (int i = 0; i < num; i++) {for (int j = 0; j < num; j++) {newChars[j][num-i-1] = chars1[i][j];}}return Arrays.deepEquals(newChars, chars2);}private static boolean judge2(char[][] chars1) {char[][] newChars = new char[num][num];for (int i = 0; i < num; i++) {for (int j = 0; j < num; j++) {newChars[num-i-1][num-j-1] = chars1[i][j];}}return Arrays.deepEquals(newChars, chars2);}private static boolean judge3(char[][] chars1) {char[][] newChars = new char[num][num];for (int i = 0; i < num; i++) {for (int j = 0; j < num; j++) {newChars[num-j-1][i] = chars1[i][j];}}return Arrays.deepEquals(newChars, chars2);}private static char[][] generateJudge4Arr() {char[][] newChars = new char[num][num];for (int i = 0; i < num; i++) {for (int j = 0; j < num; j++) {newChars[i][num-j-1] = chars1[i][j];}}return newChars;}private static boolean judge4() {char[][] newChars = generateJudge4Arr();return Arrays.deepEquals(newChars, chars2);}private static boolean judge5() {char[][] newChars = generateJudge4Arr();return judge1(newChars) || judge2(newChars) || judge3(newChars);}private static boolean judge6() {return Arrays.deepEquals(chars1, chars2);}public static void main(String[] args) {Scanner scanner = new Scanner(System.in);num = Integer.parseInt(scanner.nextLine());chars1 = new char[num][num];chars2 = new char[num][num];for (int i = 0; i < num; i++) {char[] tempChars = scanner.nextLine().toCharArray();System.arraycopy(tempChars, 0, chars1[i], 0, num);}for (int i = 0; i < num; i++) {char[] tempChars = scanner.nextLine().toCharArray();System.arraycopy(tempChars, 0, chars2[i], 0, num);}scanner.close();if (judge1(chars1)) {System.out.println(1);} else if (judge2(chars1)) {System.out.println(2);} else if (judge3(chars1)) {System.out.println(3);} else if (judge4()) {System.out.println(4);} else if (judge5()) {System.out.println(5);} else if (judge6()) {System.out.println(6);} else {System.out.println(7);}}}

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