     "metadata": {},
     "source": [
      "## Constraints\n",
      "\n",
      "* Do you expect the methods to be enqueue and dequeue?\n",
      "    * Yes\n",
      "* Can we assume we already have a stack class that can be used for this problem?\n",
      "    * Yes"
     ]
    },
 
</s>
    "* Do we expect the methods to be enqueue and dequeue?\n",
     "metadata": {},
     "source": [
      "## Constraints\n",
      "\n",
    "* Do we expect the methods to be enqueue and dequeue?\n",
      "    * Yes\n",
      "* Can we assume we already have a stack class that can be used for this problem?\n",
      "    * Yes"
     ]
    },
keep keep keep keep replace keep keep keep keep keep
 Polish queue from stacks challenge and solution (#74)

Update constraints, algorithm discussion, and code.
stacks_queues/queue_from_stacks/queue_from_stacks_solution.ipynb