题目4---求直方图的最大矩形面积(1)

Leet Code 84 求直方图的最大矩形面积 1.题目 Given n non-negative integers representing the histogram’s bar height where the width of each bar is 1, find the area of largest rectangle in the histogram. 有n个非负整数形成的直方图,假设每个矩形区域的边长为