프로그래머스 - 바탕화면 정리

import Foundation

func 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, x)
                minY = min(minY, y)
                maxX = max(maxX, x)
                maxY = max(maxY, y)
            }
        }
    }
    
    return [minY, minX, maxY+1, maxX+1]
}