0011-container-with-most-water.kt

 class Solution {
    fun maxArea(heights: IntArray): Int {
        
        if(heights.isEmpty()) return 0
        
        val size = heights.size
        var lo = 0
        var hi = size -1 
        var maxArea = 0
        
        while(lo < hi){
            val area = minOf(heights[lo], heights[hi]) * (hi - lo)
            maxArea = maxOf(maxArea, area)
            
            if(heights[lo] < heights[hi])
                ++lo
            else --hi
        }
        
        return maxArea
    }
}