0 分
by CEFqwq @ 2023-10-05 11:33:16
@[tlxjy](/user/482610) 考虑预处理 ans,varphi[] 和 ans[] 都开 long long,能过
by __er @ 2023-10-05 12:02:25
$O(\sqrt{n})$ 回答会 T 两个
by __er @ 2023-10-05 12:03:25