题目中 $1\le n$ 所以：

• https://www.luogu.com.cn/article/hwoczlur
• https://www.luogu.com.cn/article/p7s6lb1c
• https://www.luogu.com.cn/article/msujhpk4
• https://www.luogu.com.cn/article/a1iws2pp
• https://www.luogu.com.cn/article/1s3yhb74
• https://www.luogu.com.cn/article/urq2k6z7
• https://www.luogu.com.cn/article/t0dgbbp2 (CE + WA)
• https://www.luogu.com.cn/article/a9x4fmnw
• https://www.luogu.com.cn/article/zsev24kf
• https://www.luogu.com.cn/article/pfcj8kfn (CE + TLE?WA)
• https://www.luogu.com.cn/article/002qcahr

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1

这告诉我们：写题解的时候不要放代码。那一天被某个 ** 给 hack 了