蓝桥杯地址怎么填(蓝桥杯填空题)

暴力解法干他。。。dfs进行处理

import java.util.Arrays;
import java.util.linkedList;

public class SenvenB {
    public static int count = 0;
    public static linkedList path = new linkedList<>();

    public static void dfs(int[][] map,int row,int col){
        if(path.size() == 10){
            count++;
            return;
        }
        if(col == map[0].length){
            dfs(map,row+1,0);
            return;
        }
        for(int i = 0;i <= 9;i++){
            if(path.contains(i)){
                continue;
            }
            if(col > 0 && Math.abs(i-map[row][col-1]) == 1){
                continue;
            }
            if(row > 0 && Math.abs(i-map[row-1][col]) == 1){
                continue;
            }
            if(row > 0 && col > 0 && Math.abs(i-map[row-1][col-1]) == 1){
                continue;
            }
            if(row > 0 && col + 1 < map[0].length && Math.abs(i-map[row-1][col+1]) == 1){
                continue;
            }
            path.add(i);
            map[row][col] = i;
            dfs(map,row,col+1);
            map[row][col] = -2;
            path.removeLast();
        }
        return;
    }
    public static void main(String[] args){
        int[][] map = new int[3][4];
        for(int[] nums:map){
            Arrays.fill(nums,-2);
        }
        dfs(map,0,1);
        System.out.println(count);
    }
}