POJ 1753 翻轉游戲 列舉 (JAVA)
阿新 • • 發佈:2018-12-13
import java.util.Scanner; public class FlipGame { /* * 翻轉游戲 列舉 */ public static boolean isFinish(int[][] fields) { // 判斷是否完成 int flag_color = 0; for (int i = 0; i < fields.length; i++) { for (int j = 0; j < fields[0].length; j++) { if (i == 0 && j == 0) { flag_color = fields[i][j]; continue; } if (fields[i][j] != flag_color) { return false; } } } return true; } public static void flip(int[][] fields, int index) { // 翻轉 int i = (index - 1) / fields.length; int j = (index - 1) % fields.length; fields[i][j] = fields[i][j] & 2; if (i > 0) fields[i - 1][j] = (fields[i - 1][j] + 1) % 2; if (j > 0) fields[i][j - 1] = (fields[i][j - 1] + 1) % 2; if (i < 3) fields[i + 1][j] = (fields[i + 1][j] + 1) % 2; if (j < 3) fields[i][j + 1] = (fields[i][j + 1] + 1) % 2; } public static boolean combine_recut(int[] arr, int start, int[] result, int index, int NUM, int arr_len, int[][] fields) { for (int i = start; i < arr_len - (NUM - index) + 1; i++) { result[index] = i; if (index == NUM - 1) { int[][] tmp_f = new int[4][4]; for (int j = 0; j < fields.length; j++) { tmp_f[j] = fields[j].clone(); } for (int j = 0; j < NUM; j++) { System.out.print(arr[result[j]] + "\t"); // 翻轉棋子 flip(tmp_f, arr[result[j]]); } if (isFinish(tmp_f)) { System.out.println("success"); return true; } System.out.print("\n"); } else { if (combine_recut(arr, i + 1, result, index + 1, NUM, arr_len, fields)) return true; } } return false; } public static void main(String[] args) { Scanner input = new Scanner(System.in); int[][] fields = new int[4][4]; int lines = -1; String line = null; while (++lines < 4) { line = input.nextLine().trim();; char[] ar = line.toCharArray(); for (int i = 0; i < ar.length; i++) { fields[lines][i] = ar[i] == 'b' ? 1 : 0; } } if (isFinish(fields)) { System.out.println(0); return; } int arr[] = { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16 }; for (int i = 3; i <= arr.length; i++) { System.out.println("--------------------------------------------------------------------"); System.out.println("count : " + i); int[] result = new int[i]; if (combine_recut(arr, 0, result, 0, i, arr.length, fields)) { System.out.println(i); return; } } System.out.println("Impossible"); } }