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Main19236.java
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Main19236.java
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import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.Arrays;
import java.util.StringTokenizer;
public class Main19236 {
static int[] dx = { -1, -1, 0, 1, 1, 1, 0, -1 };
static int[] dy = { 0, -1, -1, -1, 0, 1, 1, 1 };
static int[][] map = new int[4][4];
static int[] shark; // x y d
static int[][] fishes = new int[16 + 1][3];
static int maxSum = 0;
public static void main(String[] args) throws NumberFormatException, IOException {
BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
for (int i = 0; i < 4; i++) {
StringTokenizer st = new StringTokenizer(br.readLine());
for (int j = 0; j < 4; j++) {
int a = Integer.parseInt(st.nextToken());
int b = Integer.parseInt(st.nextToken());
map[i][j] = a;
fishes[a][0] = i;
fishes[a][1] = j;
fishes[a][2] = b - 1;
}
}
shark = new int[3];
int fishNum = map[0][0];
shark[2] = fishes[fishNum][2]; // d
maxSum = map[0][0];
fishes[fishNum] = new int[] { -1, -1, -1 }; // dead
map[0][0] = 0;
play(maxSum);
System.out.println(maxSum);
}
static void play(int sum) {
fishMove();
sharkMove(sum);
}
static void copyVariable(int[][] cMap, int[] cShark, int[][] cFishes, int[][] map, int[] shark, int[][] fishes) {
for (int i = 0; i < 4; i++) {
for (int j = 0; j < 4; j++) {
map[i][j] = cMap[i][j];
}
}
for (int i = 0; i < 3; i++) {
shark[i] = cShark[i];
}
for (int i = 1; i <= 16; i++) {
fishes[i][0] = cFishes[i][0];
fishes[i][1] = cFishes[i][1];
fishes[i][2] = cFishes[i][2];
}
}
static void sharkMove(int sum) {
int nx = shark[0];
int ny = shark[1];
for (int i = 0; i < 4; i++) {
nx += dx[shark[2]];
ny += dy[shark[2]];
if (nx < 0 || ny < 0 || nx >= 4 || ny >= 4) {
// 비교
maxSum = maxSum > sum ? maxSum : sum;
break;
}
int fishNum = map[nx][ny];
if (fishNum != 0) {
int[][] cMap = new int[4][4];
int[] cShark = new int[3]; // x y d
int[][] cFishes = new int[16 + 1][3];
copyVariable(map, shark, fishes, cMap, cShark, cFishes);
shark[0] = nx;
shark[1] = ny;
shark[2] = fishes[fishNum][2];
map[nx][ny] = 0;
fishes[fishNum][0] = -1;
fishes[fishNum][1] = -1;
fishes[fishNum][2] = -1;
play(sum + fishNum);
copyVariable(cMap, cShark, cFishes, map, shark, fishes);
}
}
}
static void fishMove() {
for (int i = 1; i <= 16; i++) {
if (fishes[i][0] != -1 && fishes[i][1] != -1 && fishes[i][2] != -1) {// live
for (int j = 0; j < 8; j++) {
int nx = fishes[i][0] + dx[fishes[i][2]];
int ny = fishes[i][1] + dy[fishes[i][2]];
if (nx == shark[0] && ny == shark[1]) {
fishes[i][2] = (fishes[i][2] + 1) % 8;
continue;
}
if (nx < 0 || ny < 0 || nx >= 4 || ny >= 4) {
fishes[i][2] = (fishes[i][2] + 1) % 8;
continue;
}
if (map[nx][ny] != 0) {
swap(i, map[nx][ny]);
} else {
map[fishes[i][0]][fishes[i][1]] = 0;
map[nx][ny] = i;
fishes[i][0] = nx;
fishes[i][1] = ny;
}
break;
}
}
}
}
static void swap(int a, int b) {
int ax = fishes[a][0];
int ay = fishes[a][1];
int bx = fishes[b][0];
int by = fishes[b][1];
map[ax][ay] = b;
map[bx][by] = a;
int tmpx = fishes[b][0];
int tmpy = fishes[b][1];
fishes[b][0] = fishes[a][0];
fishes[b][1] = fishes[a][1];
fishes[a][0] = tmpx;
fishes[a][1] = tmpy;
}
static void printMap() {
for (int i = 0; i < 4; i++) {
System.out.println(Arrays.toString(map[i]));
}
}
}