func maxArea(height []int) int {
    res :=0

    l,r:=0,len(height)-1

    for l<r {
        area:= (r-l) * min(height[l],height[r])
        res = max(res,area)
        if height[l] < height[r] {
            l++
        }else {
            r--
        }
    }
    return res
}

func min(r,l int) int {
    if r < l {
        return r
    }
    return l
}
func max(r,l int) int {
    if r > l {
        return r
    }
    return l
}