soalfoto

import Foundation
import Glibc

public func solution(_ S : inout String) -> String {

    let array = S.components(separatedBy: "\n")


    let lines = array.map({ (line) -> [String] in
        line.components(separatedBy: ",").map{ $0.trimmingCharacters(in: CharacterSet.whitespaces)}
    })


    let returnArray = lines.map { (line) -> String in

        let ext = line[0].components(separatedBy: ".")[1]

        let cities = lines.filter { $0[1] == line[1] }.sorted(by: { (line1, line2) -> Bool in
            let dateFormatter = DateFormatter()
            dateFormatter.dateFormat = "yyyy-MM-dd HH:mm:ss"
            let date1 = dateFormatter.date(from: line1[2])!
            let date2 = dateFormatter.date(from: line2[2])!
            return date1 < date2
        })

        let index = cities.index(where: { (s) -> Bool in
            s == line
        })

        var formattedIndex = String(index! + 1)

        let zeros = String(repeatElement("0", count: String(cities.count).characters.count - formattedIndex.characters.count))

        return line[1] + zeros + formattedIndex  + "." + ext
    }


    return returnArray.joined(separator: "\n")
}