Cat_shao @ 2022-08-04 20:27:34
输入
3 1 1 2 2 1 1 1 1 1 2 0 1
答案
1
https://www.luogu.com.cn/blog/George1123/solution-p4097
by dk_qwq @ 2023-09-14 21:26:16
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