const roundsInput = document.querySelector('#rounds')

const result = document.querySelector('pre')

​

playerInput.addEventListener('input', e => {

  sanitize(playerInput, 1, 30)

  runGame()

})

​

roundsInput.addEventListener('input', e => {

  sanitize(roundsInput, 1, 30)

  runGame()

})

​

function sanitize(element, min, max) {

  if (!element.value || element.value < min) {

    element.value = min

  }

  if (element.value > max) {

    element.value = max

  }

  if (!Number.isInteger(element.value)) {

    element.value = Math.floor(element.value)

  }

}

function runGame() {

  players = Number(playerInput.value) || 1

  rounds = Number(roundsInput.value) || 1

  let amounts = []

  while (amounts.length < players) {

    thisAmount = 100

    for (let i = 0; i < rounds; i++) {

      const multiplier = Math.random() < 0.5 ? 1.5 : 0.6

      thisAmount *= multiplier

    }

    amounts.push(thisAmount)

  }

  amounts = amounts.map(a =>

    a.toFixed(2))

  result.innerHTML = amounts.join('<br>')

}

​

​