import Foundation func solution(_ seoul:[String]) -> String { return "김서방은 \(seoul.firstIndex(of: "Kim")!)에 있다" }

import Foundation func solution(_ number:[Int]) -> Int { var result = 0 for i in 0..

import Foundation func solution(_ price:Int, _ money:Int, _ count:Int) -> Int{ return max((count + 1) * count / 2 * price - money , 0) }

func solution(_ s:String) -> Int { return Int(s)! }

func solution(_ s:String) -> Bool { return (Int(s) != nil && (s.count == 4 || s.count == 6)) ? true : false }

import Foundation func solution(_ s:String) -> String { String(s.sorted(by: >)) }

import Foundation func solution(_ s:String) -> Bool { let string = s.lowercased() return string.components(separatedBy: "p").count == string.components(separatedBy: "y").count }

import Foundation func solution(_ strings:[String], _ n:Int) -> [String] { return strings.sorted { Array($0)[n] == Array($1)[n] ? $0 < $1 : Array($0)[n] < Array($1)[n] } }