let area = 0;
            for(let i = 0; i < h.length; i++){
                let height = h[i]
                let length = 1 
                let area1 = 0;
                let area2 = 0;
                let j = i+1;
                    //forward traversal
                    while(j < h.length){
                        if(height > h[j])break
                        if(height <= h[j])length++
                        j++           
                    }
                    area1 = (height*length);
                    j = i-1;
                    length = 1;
                    // Backward Traversal
                    while(j >= 0){
                        if(height > h[j])break
                        if(height <= h[j])length++
                        j--;         
                    }
                    area2 = (height*(length-1));
                if(area < (area1+area2))area = (area1+area2) 
            }
            return area;