Tower breakers game algorithm

TowerBreakers.swift

import Foundation

/*
 * Complete the 'towerBreakers' function below.
 *
 * The function is expected to return an INTEGER.
 * The function accepts following parameters:
 *  1. INTEGER n
 *  2. INTEGER m
 */

func towerBreakers(n: Int, m: Int) -> Int {
    return m == 1 || n % 2 == 0 ? 2 : 1 // solution
}

let stdout = ProcessInfo.processInfo.environment["OUTPUT_PATH"]!
FileManager.default.createFile(atPath: stdout, contents: nil, attributes: nil)
let fileHandle = FileHandle(forWritingAtPath: stdout)!

guard let t = Int((readLine()?.trimmingCharacters(in: .whitespacesAndNewlines))!)
else { fatalError("Bad input") }

for tItr in 1...t {
    guard let firstMultipleInputTemp = readLine()?.replacingOccurrences(of: "\\s+$", with: "", options: .regularExpression) else { fatalError("Bad input") }
    let firstMultipleInput = firstMultipleInputTemp.split(separator: " ").map{ String($0) }

    guard let n = Int(firstMultipleInput[0])
    else { fatalError("Bad input") }

    guard let m = Int(firstMultipleInput[1])
    else { fatalError("Bad input") }

    let result = towerBreakers(n: n, m: m)

    fileHandle.write(String(result).data(using: .utf8)!)
    fileHandle.write("\n".data(using: .utf8)!)
}

The code above will only compile in the HackerRank online IDE, since there's no scope provided.