m 次输入中可能会有重复点，记忆化一下，算过直接输出。
by Algophitronrhythm_ @ 2024-04-27 17:26:34
```cpp
if (book[x][y] == -1){
bfs(x,y);
}else{
ans[i]=ans[book[x][y]];
}
```
`book[]`为记录数组
by Algophitronrhythm_ @ 2024-04-27 17:27:49
@[Algophitronrhythm_](/user/757040) 也能教教我吗？Thx
by nothing_exe_studio @ 2024-04-27 17:32:53
《第一天会bfs》（无恶意
by Snoozing_QwQ @ 2024-04-27 17:32:59
@[Algophitronrhythm_](/user/757040) 感谢大佬
by 2011Andy @ 2024-04-27 17:33:50
@[nothing_exe_studio](/user/1108078) ?啥
by Algophitronrhythm_ @ 2024-04-27 17:33:50
@[Algophitronrhythm_](/user/757040) 在[讨论版](https://www.luogu.com.cn/discuss/813353)
by nothing_exe_studio @ 2024-04-27 17:44:10