代码随想录day60|84. 柱状图中最大的矩形

​​​​​​84. 柱状图中最大的矩形

class Solution:
    def largestRectangleArea(self, heights: List[int]) -> int:
        # st = [0]
        # result = 0
        # for i in range(1,len(heights)):
        #     if heights[i] >= heights[st[-1]]:
        #         st.append(i)
        #     else:
        #         while st and heights[i]
        #             mid = st.pop()
        #             if st:
        #                 result =max(result,heights[mid]*(i-st[-1]-1))
        #             else:
        #                 result = max(result,heights[mid]*(i))
 
        #         st.append(i)
        # if st:
        #     for j in range(len(st)-1,0,-1):
        #         result =max(result,(len(heights)-st[j-1]-1)*heights[st[j]])
        # result =max(result,len(heights)*heights[st[0]])
        
        # return result
        st = [0]
        result = 0
        heights.append(0)
        heights.insert(0,0)
        for i in range(1,len(heights)):
            if heights[i] >= heights[st[-1]]:
                st.append(i)
            else:
                while st and heights[i]1]]:
                    mid = st.pop()
                    if st:
                        result =max(result,heights[mid]*(i-st[-1]-1))
                st.append(i)        
        return result