(swift) -[백준/boj] 1065번 : 한수

 

문제 링크 :

https://www.acmicpc.net/problem/1065

1065번: 한수

 

난이도 : Silver 4

 

 

Swift Code :

import Foundation

let N = Int(readLine()!)!
var answer = 0

func intToStringArr(_ n:Int)->Array<String>{
    var arr = [String]()
    for i in String(n){
        arr.append("\(i)")
    }
    return arr
}

func oneNum(_ n:Int){
    
    let num = intToStringArr(n)
    let gap = Int(num[0])!-Int(num[1])!
    for i in 2...num.count-1{
        if  gap != Int(num[i-1])!-Int(num[i])!{
            return
        }
    }
    answer+=1
}

for i in 1...N{
    if i < 100 {
        answer+=1
    }else{
        oneNum(i)
    }
}