就 $0$ 啊
by snail2956 @ 2022-12-30 14:50:05
@[snail2956](/user/579234) 第0个H数为什么是0啊
by SJH_qwq @ 2022-12-31 12:46:57
同问
by _brokenstring @ 2023-06-19 08:52:59