[Swift] 2022 KAKAO BLIND RECRUITMENT 주차 요금 계산

Problem

 

코딩테스트 연습 - 주차 요금 계산

---

Solution

 

1. records의 기록대로 시간을 계산해 저장한다.

 

var timeInfo:[String:Int] = [:]
var parkInfo:[String:Int] = [:]

func calTimeByRecord(_ records:[String],_ parkInfo:inout [String:Int],_ timeInfo:inout [String:Int]) {
    for record in records {
        let split = record.split(separator: " ")
        let time = String(split[0])
        let number = String(split[1])
        let isIN = split[2] == "IN"
        if isIN {
            parkInfo[number] = changeTimeToMinutes(time)
        }else {
            let out = changeTimeToMinutes(time)
            let minutes = out - parkInfo[number]!
            if timeInfo[number] == nil {
                timeInfo[number] = minutes
            }else {
                timeInfo[number]! += minutes
            }
            parkInfo[number] = nil
        }
    }
}

 

* 문자로 된 시간을 분으로 바꾸는 함수

 

func changeTimeToMinutes(_ time:String) -> Int {
    let split = time.split(separator: ":")
    let hours = Int(split[0])!
    let minutes = Int(split[1])!
    return hours*60 + minutes
}

 

2. 만약 주차 정보에 들어온 정보만 있다면 최대 시간(23:59)에서 들어온 시간을 구해준다.

 

    let maxTime = 23*60+59

    for (number,time) in parkInfo {
        if timeInfo[number] == nil {
            timeInfo[number] = maxTime - time
        }else {
            timeInfo[number]! += maxTime - time
        }
    }

 

3. 시간대로 요금을 구한다.

 

  for (number,time) in timeInfo {
        feeInfo[number] = getTotalFee(time,fees)
    }

 

* 요금을 구하는 함수

 

func getTotalFee(_ minutes:Int,_ fees:[Int]) -> Int {
    let freetime = fees[0]
    let defaultFee = fees[1]
    let perTime = fees[2]
    let fee = fees[3]
    if minutes <= freetime { return defaultFee }
    let c = Int(ceil(Double((minutes - freetime))/Double(perTime)))
    let total = defaultFee + c * fee
    return total
}

 

4. 번호판이 적은 순으로 정렬해서 반환한다.

 

 return feeInfo.sorted{$0.key < $1.key}.map{$0.value}

---

Source Code

 

	import Foundation
	func solution(_ fees:[Int], _ records:[String]) -> [Int] {
	var parkInfo:[String:Int] = [:]
	var timeInfo:[String:Int] = [:]
	var feeInfo:[String:Int] = [:]
	let maxTime = 23*60+59
	calTimeByRecord(records,&parkInfo, &timeInfo)
	for (number,time) in parkInfo {
	if timeInfo[number] == nil {
	timeInfo[number] = maxTime - time
	}else {
	timeInfo[number]! += maxTime - time
	}
	}
	for (number,time) in timeInfo {
	feeInfo[number] = getTotalFee(time,fees)
	}
	return feeInfo.sorted{$0.key < $1.key}.map{$0.value}
	}
	func calTimeByRecord(_ records:[String],_ parkInfo:inout [String:Int],_ timeInfo:inout [String:Int]) {
	for record in records {
	let split = record.split(separator: " ")
	let time = String(split[0])
	let number = String(split[1])
	let isIN = split[2] == "IN"
	if isIN {
	parkInfo[number] = changeTimeToMinutes(time)
	}else {
	let out = changeTimeToMinutes(time)
	let minutes = out - parkInfo[number]!
	if timeInfo[number] == nil {
	timeInfo[number] = minutes
	}else {
	timeInfo[number]! += minutes
	}
	parkInfo[number] = nil
	}
	}
	}
	func getTotalFee(_ minutes:Int,_ fees:[Int]) -> Int {
	let freetime = fees[0]
	let defaultFee = fees[1]
	let perTime = fees[2]
	let fee = fees[3]
	if minutes <= freetime { return defaultFee }
	let c = Int(ceil(Double((minutes - freetime))/Double(perTime)))
	let total = defaultFee + c * fee
	return total
	}
	func changeTimeToMinutes(_ time:String) -> Int {
	let split = time.split(separator: ":")
	let hours = Int(split[0])!
	let minutes = Int(split[1])!
	return hours*60 + minutes
	}

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