AoC, task 1, part 2. Swift version. Slow as fuck.

01b.swift

import Foundation

let path = Bundle.main.path(forResource: "01.txt", ofType: nil)!
let str = try String(contentsOfFile: path, encoding: String.Encoding.utf8)
let lines = str.split(whereSeparator: \.isNewline).map({Int($0)})

for a in lines {
    for b in lines {
        for c in lines {
            if (a! + b! + c! == 2020) {
                print(a! * b! * c!)
            }
        }
    }
}