Trap Water

def trap(self, height: List[int]) -> int:
        if(len(height) == 0):
            return 0
        maxi = max(height)
        maxl = height.index(maxi)
        maxr = len(height) - height[::-1].index(maxi) - 1

        h = [0]*len(height)
        h[0] = height[0]
        h[-1] = height[-1]
        for i in range(1,maxr+1):
            if(h[i-1] <= height[i]):
                h[i] = height[i]
            else:
                h[i] = h[i-1]
        for i in range(maxr,len(height)-1).__reversed__():
            if(h[i+1] <= height[i]):
                h[i] = height[i]
            else:
                h[i] = h[i+1]
        return sum(h) - sum(height)