Get ultrasignup points based on elapsed times

index.js

const timeToSeconds = (t) => t
  .split(':')
  .reverse()
  .reduce((acc, value, i) => acc + value * Math.pow(60, i), 0)

const timesToPoints = (...times) => Math.round(times[0] / times[1] * 1000)

const main = (...times) => {
  const parsed = times.map(timeToSeconds)
  if (parsed.length === 3) {
    return timesToPoints(parsed[0], parsed[1]) - timesToPoints(parsed[0], parsed[2])
  } else {
    return timesToPoints(...parsed)
  }

}

// > node index.js 4:24:00 5:26:00
// 810
// > node index.js 4:24:00 5:27:00 5:30:00
// 7
console.log(main(...process.argv.slice(2)))