maxWaterArea
# 11
class Solution:
def maxArea(self, height: List[int]) -> int:
start=0
end=len(height)-1
maxx=0
while start < end:
x = min(height[start], height[end])
area = x * (end - start)
maxx = max(maxx, area)
if height[start]<height[end]:
start+=1
else:
end-=1
return maxx