Container With Most Water || Trapping Rain Water

 

public int maxArea(int[] height) {
        int res=0;
       
        int left = 0;
        int right = height.length-1;
        
        while(left<right){
         
            int area = (right-left)*Math.min(height[left],height[right]);
            res=Math.max(res,area);
              if(height[left]>height[right]){
                right--;
            }
            else{
                left++;
            }
            
        }
       
        return res;
    }