[프로그래머스]약수의 개수와 덧셈(Swift)

import Foundation

func solution(_ left:Int, _ right:Int) -> Int {
    
    var count = 0
    var result = 0
    
    for n in left...right {
        
        count = 0
        for i in 1...n {
            if n % i == 0 {
                count += 1
            }
        }
        
        count % 2 == 0 ? result += n : result += -n
    }
    
    return result
}

func solution(_ left: Int, _ right: Int) -> Int {
    return (left...right).map { i in (1...i).filter { i % $0 == 0 }.count % 2 == 0 ? i : -i }.reduce(0, +)
}