链接:https://ac.nowcoder.com/acm/contest/881/A 来源:牛客网 Equivalent Prefixes 时间限制:C/C++ 2秒,其他语言4秒 空间限制:C/C++ 524288K,其他语言1048576K 64bit IO Format: %lld 题目描述 Two arrays u and v each with m distinct elements are called equivalent if and only if R M Q ( u ,…