      "\n",
      "* Push and pop on an empty stack\n",
      "* Push and pop on a non-empty stack\n",
      "* Push on a capacity stack to create a new one\n",
      "* Pop on a one element stack to destroy it"
     ]
    },
    {
     "cell_type": "markdown",
     "metadata": {},
 
</s> remove       "Test: Pop on a one element stack to destroy it\n",
 </s> add       "Test: Pop on a stack to destroy it\n", </s> remove         print('Test: Pop on a one element stack to destroy it')
 </s> add         print('Test: Pop on a stack to destroy it') </s> remove     "        print('Test: Pop on a one element stack to destroy it')\n",
 </s> add     "        print('Test: Pop on a stack to destroy it')\n", </s> remove     "* Space: O(1)\n",
 </s> add     "* Space: O(m), where m is the size of the new stack\n", </s> remove     "* If a stack becomes full, we should automatically create one?\n",
 </s> add     "* If a stack becomes full, should we automatically create one?\n",
    "* Pop on a stack to destroy it"
      "\n",
      "* Push and pop on an empty stack\n",
      "* Push and pop on a non-empty stack\n",
      "* Push on a capacity stack to create a new one\n",
    "* Pop on a stack to destroy it"
     ]
    },
    {
     "cell_type": "markdown",
     "metadata": {},
keep keep keep keep replace keep keep keep keep keep
 Polish set of stacks solution 
stacks_queues/set_of_stacks/set_of_stacks_solution.ipynb