2019牛客多校第8场

A题html 单调栈的应用node 连接：https://ac.nowcoder.com/acm/contest/888/A 来源：牛客网  ios 题目描述 Gromah and LZR entered the great tomb, the first thing they see is a matrix of size n×mn\times mn×m, and the elements in

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