题解 | #跳台阶#

function jumpFloor(number)
{
  if (number === 0 || number === 1 || number === 2) {
    return number
  }
  
  let one = 1, two = 2, result = 0
  for (let i = 3; i <= number; i++) {
    result = one + two
    one = two
    two = result
  }
  
  return result
}

module.exports = {
    jumpFloor : jumpFloor
};