字节跳动第二次笔试 80,20,70,10
字节跳动第二次笔试 80,20,70,10
第三题，2048游戏
import java.util.*;
public class Main {
public static void main(String[] args) {
Scanner in = new Scanner(System.in);
int n = 4;
int s = in.nextInt();
int[][] arr = new int[n][n];
for (int i = 0; i < n; i++) {
for (int j = 0; j < n; j++) {
arr[i][j] = in.nextInt();
}
}
if (s == 1) {
for (int j = 0; j < 4; j++) {
for (int i = 0; i < n - 1; i++) {
if (arr[i][j] == arr[i + 1][j]) {
arr[i][j] *= 2;
arr[i + 1][j] = 0;
}
}
int t = 0;
for (int i = 0; i < n; i++) {
if (arr[i][j] != 0) {
arr[t][j] = arr[i][j];
t++;
}
}
while (t < n) {
arr[t][j] = 0;
t++;
}
}
} else if (s == 2) {
for (int j = 0; j < 4; j++) {
for (int i = n - 1; i > 0; i--) {
if (arr[i][j] == arr[i - 1][j]) {
arr[i][j] *= 2;
arr[i - 1][j] = 0;
}
}
int t = n - 1;
for (int i = n - 1; i >= 0; i--) {
if (arr[i][j] != 0) {
arr[t][j] = arr[i][j];
t--;
}
}
while (t >= 0) {
arr[t][j] = 0;
t--;
}
}
} else if (s == 3) {
for (int i = 0; i < n - 1; i++) {
for (int j = 0; j < n - 1; j++) {
if (arr[i][j] == arr[i][j + 1]) {
arr[i][j] *= 2;
arr[i][j + 1] = 0;
}
}
int t = 0;
for (int j = 0; j < n; j++) {
if (arr[i][j] != 0) {
arr[i][t] = arr[i][j];
t++;
}
}
while (t < n) {
arr[i][t] = 0;
t++;
}
}
} else if (s == 4) {
for (int i = 0; i < n - 1; i++) {
for (int j = n - 1; j > 0; j--) {
if (arr[i][j] == arr[i][j - 1]) {
arr[i][j] *= 2;
arr[i][j - 1] = 0;
}
}
int t = n-1;
for (int j = n - 1; j >= 0; j--) {
if (arr[i][j] != 0) {
arr[i][t] = arr[i][j];
t--;
}
}
while (t>=0) {
arr[i][t] = 0;
t--;
}
}
}
for (int i = 0; i < n; i++) {
for (int j = 0; j < n; j++) {
System.out.print(arr[i][j] + " ");
}
System.out.println();
}
}
} 
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