`g1[i].push_back(to);` 这一句应改成 `g1[color[i]].push_back(color[to]);`。 by definieren @ 2023-10-15 21:39:52
@[definieren](/user/432948) 谢谢大佬,AC了 by MornHus @ 2023-10-15 21:44:37