输入

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答案

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被 hack 的题解：

• https://www.luogu.com.cn/article/ear0v7xo 输出 2。@Kelin
• https://www.luogu.com.cn/article/fvt3l1ew 输出 2。@Soulist
• https://www.luogu.com.cn/article/3iilzs1c RE。@TernaryTree
• https://www.luogu.com.cn/article/pga1g7nt 输出 2。@木xx木大
• https://www.luogu.com.cn/article/nb2n5r9t RE。@Larunatrecy
• https://www.luogu.com.cn/article/bkd9ml17 输出 2。@Awar3ness
• https://www.luogu.com.cn/article/2dfojplk RE。@Leasier

测试一下新出的题解备注功能 111