11 Container With Most Water

Given n non-negative integers a1, a2, ..., an, 
where each represents a point at coordinate (i, ai). 
n vertical lines are drawn such that the two endpoints of line i is at (i, ai) and (i, 0). 
Find two lines, which together with x-axis forms a container, 
such that the container contains the most water.

Note: You may not slant the container and n is at least 2.

ans = Math.max(ans, Math.min(height[left], height[right]) * (right - left));

not right - left + 1 
because [1, 1] expect result is 1 not 2
it means 1 and 1 together makes a container |_|

class Solution {
    public int maxArea(int[] height) {
        if (height == null || height.length == 0) {
            return 0;
        }
        int left = 0;
        int right = height.length - 1;
        int ans = 0;
        while (left < right) {
            ans = Math.max(ans, Math.min(height[left], height[right]) * (right - left));
            if (height[left] < height[right]) {
                left++;
            }else {
                right--;
            }
        }
        return ans;
    }
}