function solve (arr, num) {
  let [damagePerHit, stopNumber, rounds] = [
    Math.min(...arr),
    Math.max(...arr),
    1
  ]

  let [firstPart, secondPart, firstGiant, secondGiant] = [
    arr.slice(0, arr.length / 2),
    arr.slice(arr.length / 2),
    [],
    []
  ]

  while (firstPart.length > 0) {
    firstGiant.push(firstPart.splice(0, num).reduce((acc, el) => acc * el))
    secondGiant.push(secondPart.splice(0, num).reduce((acc, el) => acc * el))
  }

  firstGiant = firstGiant.reduce((acc, el) => acc + el, 0)
  secondGiant = secondGiant.reduce((acc, el) => acc + el, 0)

  if (damagePerHit !== 0) {
    while (firstGiant > stopNumber && secondGiant > stopNumber) {
      firstGiant -= damagePerHit
      secondGiant -= damagePerHit
      rounds++
    }
  }

  console.log(
    firstGiant === secondGiant
      ? `Its a draw ${firstGiant} - ${secondGiant}`
      : firstGiant > secondGiant
        ? `First Giant defeated Second Giant with result ${firstGiant} - ${secondGiant} in ${rounds} rounds`
        : `Second Giant defeated First Giant with result ${secondGiant} - ${firstGiant} in ${rounds} rounds`
  )
}