73. 1로 만들기

import Foundation

func solution(_ num_list:[Int]) -> Int {
    
    var answer : Int = 0
    var arr : [Int] = []
    var n : Int = 0
    
    arr = num_list
    
    for i in arr.indices {
        while (arr[i] != 1) {
            n = 0
            if arr[i] % 2 == 0 {
                arr[i] = arr[i] / 2
                n+=1
            } else {
                arr[i] = (arr[i]-1) / 2
                n+=1
            }
            answer += n 
        }
    }
    
    return answer
}