Решение

class Solution {
    fun countGoodRectangles(rectangles: Array<IntArray>): Int {
        var maxSide = 0
        for ((l, w) in rectangles) {
            val side = minOf(l, w)
            if (side > maxSide) maxSide = side
        }
        var count = 0
        for ((l, w) in rectangles) {
            if (minOf(l, w) == maxSide) count++
        }
        return count
    }
}