将下标从0开始 ``` if(a[x][y]!='.' || x < 0 || y < 0 || x >= r || y >= c) continue; ``` 然后再加dx和dy by Foggy_night @ 2022-10-31 12:38:14
下面还得将k给特判 by Foggy_night @ 2022-10-31 12:39:08