[Swift] 프로그래머스150368 이모티콘 할인행사

import Foundation

func solution(_ users:[[Int]], _ emoticons:[Int]) -> [Int] {
    var answer = [0, 0]

    func getAnswer(_ current: [Int]) {
        
        if current.count > emoticons.count { return }

        stride(from: 10, through: 40, by: 10).forEach { getAnswer(current + [$0]) }

        if current.count < emoticons.count { return }

        var result = [0, 0]

        users.forEach { user in
            var userInfo = [0, 0]          

            for i in current.indices {
                if current[i] >= user[0] {
                    userInfo[1] += emoticons[i] * (100 - current[i]) / 100
                }
                if userInfo[1] >= user[1] {
                    userInfo = [1, 0]
                    break
                }
            }

            result[0] += userInfo[0]
            result[1] += userInfo[1]
        }

        if result[0] > answer[0] || (result[0] == answer[0] && result[1] > answer[1]) {
            answer = result
        }
    }

    getAnswer([Int]())

    return answer
}