@[The_Shadow_Dragon](/user/848964)
by chenxinhao0402 @ 2023-02-01 08:54:29
@[chenxinhao0402](/user/799227) 把这段循环改成
```
for(int i=0;i<=1;i++)
if(tree[i]==0)s++;
```
```
for(int i=0;i<=l;i++)
if(tree[i]==0)s++;
by hzoi_Shadow @ 2023-02-01 08:56:08
@[chenxinhao0402](/user/799227) $1$ 和 $l$ 写反了
by hzoi_Shadow @ 2023-02-01 08:56:37
AC了，谢谢各位
by chenxinhao0402 @ 2023-02-01 08:59:26