Code

import java.util.Scanner;
public class MaxWater {

	public static int maxArea(int height[]) {
		if (height.length < 1) {
			return 0;
		}

		int left = 0;
		int right = height.length-1;
		int base = right - left; 
		int Area = 0; 
		int val = 0; 
		
		while(left < right) {
			val = Math.min(height[left],height[right]);
			int Temp_Area =  0;
			Temp_Area = base * val;
			if(Temp_Area > Area) {
				Area = Temp_Area; 
			}
			if(val == height[left]) {
				left++;
				base--; 
			}
			else {
				right--;
				base--; 
			}
		}
		
		
		return Area;  
	}
	public static void main(String[] args) {
		// TODO Auto-generated method stub
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt(); 
		int [] arr = new int [n];
		
		for(int i = 0; i<n ; i++) 
			arr[i] = sc.nextInt(); 
	
		
	System.out.println(maxArea(arr));
	}
		

}