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====== 2020牛客暑期多校训练营（第一场） ====== [[https://ac.nowcoder.com/acm/contest/5666|比赛链接]] ===== A - B-Suffix Array ===== Upsolved by qxforever. ==== 题目描述 ==== 对于一个字符串 $s$，定义 $b_i=\min_{1\le j