@[da_ke](/user/766675) 《`linker.back()`》
```cpp
back() const _GLIBCXX_NOEXCEPT
{
__glibcxx_requires_nonempty();
return *(end() - 1);
}
```
你看到没？它不是迭代器。
by Terrible @ 2024-04-13 10:11:24
@[Terrible](/user/195942) 哦,`end`用成`back`了,智商都没wqwq
谢谢
by da_ke @ 2024-04-13 10:12:21
@[da_ke](/user/766675) `if(i!=j)`应该为`if(k!=0)`
<https://www.luogu.com.cn/discuss/777498>
by da_ke @ 2024-04-13 10:34:04
[pre](https://www.luogu.com.cn/discuss/804803)
by da_ke @ 2024-04-13 10:34:40