[Swift 알고리즘] 가장 큰 수

https://programmers.co.kr/learn/courses/30/lessons/42746

import Foundation

func solution(_ numbers:[Int]) -> String {
    
    let numbersArray = numbers.map {String($0)}.sorted {$0 + $1 > $1 + $0}
    
    let answer = numbersArray.reduce("",+)
    
    return Int(answer) == 0 ? "0" : answer

}