import Foundationfunc solution(_ wallpaper:[String]) -> [Int] { var wallpapers: [(Int,Int)] = [] var minX = Int.max var minY = Int.max var maxX = Int.min var maxY = Int.min for (y, value1) in wallpaper.enumerated() { for (x, value2) in value1.enumerated() { if value2 == "#" { wallpapers.append((y, x)) minX = min(minX, ..