[Swift 알고리즘] 두 개 뽑아서 더하기

https://programmers.co.kr/learn/courses/30/lessons/68644

import Foundation

func solution(_ numbers:[Int]) -> [Int] {
    
    var answer = [Int]()
    
    for i in 0..<numbers.count - 1 {
        for j in i + 1..<numbers.count {
            let result = numbers[i] + numbers[j]
            if !answer.contains(result){
                answer.append(result)
            }
        }
    }
    
    return answer.sorted()
}