StarMirror/interactive-coding-challenges
1
0
Fork 0
mirror of https://github.com/donnemartin/interactive-coding-challenges.git synced 2024-03-22 13:11:13 +08:00
Code Issues Projects Releases Wiki Activity

Polish bst min challenge and solution (#76)

Browse Source 
Update constraints, algorithm discussion, and code.
This commit is contained in:
Donne Martin 2016-06-25 08:23:28 -04:00 committed by GitHub
parent c24a628329
commit 1321723eb9
2 changed files with 21 additions and 17 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

16
graphs_trees/bst_min/bst_min_challenge.ipynb
View File

@ -39,6 +39,8 @@
"* Are the array elements unique?\n", "* Are the array elements unique?\n",
" * Yes\n", " * Yes\n",
"* Can we assume we already have a Node class with an insert method?\n", "* Can we assume we already have a Node class with an insert method?\n",
" * Yes\n",
"* Can we assume this fits memory?\n",
" * Yes" " * Yes"
] ]
}, },
@ -90,11 +92,11 @@
"source": [ "source": [
"def create_min_bst(array):\n", "def create_min_bst(array):\n",
" # TODO: Implement me\n", " # TODO: Implement me\n",
" # Calls __create_min_bst__\n", " # Calls _create_min_bst\n",
" pass \n", " pass \n",
"\n", "\n",
"\n", "\n",
"def __create_min_bst__(array, start, end):\n", "def _create_min_bst(array, start, end):\n",
" # TODO: Implement me\n", " # TODO: Implement me\n",
" pass" " pass"
] ]
@ -171,21 +173,21 @@
], ],
"metadata": { "metadata": {
"kernelspec": { "kernelspec": {
"display_name": "Python 2", "display_name": "Python 3",
"language": "python", "language": "python",
"name": "python2" "name": "python3"
}, },
"language_info": { "language_info": {
"codemirror_mode": { "codemirror_mode": {
"name": "ipython", "name": "ipython",
"version": 2 "version": 3
}, },
"file_extension": ".py", "file_extension": ".py",
"mimetype": "text/x-python", "mimetype": "text/x-python",
"name": "python", "name": "python",
"nbconvert_exporter": "python", "nbconvert_exporter": "python",
"pygments_lexer": "ipython2", "pygments_lexer": "ipython3",
"version": "2.7.10" "version": "3.5.0"
} }
}, },
"nbformat": 4, "nbformat": 4,

22
graphs_trees/bst_min/bst_min_solution.ipynb
View File

@ -38,6 +38,8 @@
"* Are the array elements unique?\n", "* Are the array elements unique?\n",
" * Yes\n", " * Yes\n",
"* Can we assume we already have a Node class with an insert method?\n", "* Can we assume we already have a Node class with an insert method?\n",
" * Yes\n",
"* Can we assume this fits memory?\n",
" * Yes" " * Yes"
] ]
}, },
@ -103,16 +105,16 @@
"def create_min_bst(array):\n", "def create_min_bst(array):\n",
" if array is None:\n", " if array is None:\n",
" return\n", " return\n",
" return __create_min_bst__(array, 0, len(array)-1)\n", " return _create_min_bst(array, 0, len(array)-1)\n",
"\n", "\n",
"\n", "\n",
"def __create_min_bst__(array, start, end):\n", "def _create_min_bst(array, start, end):\n",
" if end < start:\n", " if end < start:\n",
" return\n", " return None\n",
" mid = (start + end) // 2\n", " mid = (start + end) // 2\n",
" node = Node(array[mid])\n", " node = Node(array[mid])\n",
" node.left = __create_min_bst__(array, start, mid-1)\n", " node.left = _create_min_bst(array, start, mid-1)\n",
" node.right = __create_min_bst__(array, mid+1, end)\n", " node.right = _create_min_bst(array, mid+1, end)\n",
" return node" " return node"
] ]
}, },
@ -199,21 +201,21 @@
], ],
"metadata": { "metadata": {
"kernelspec": { "kernelspec": {
"display_name": "Python 2", "display_name": "Python 3",
"language": "python", "language": "python",
"name": "python2" "name": "python3"
}, },
"language_info": { "language_info": {
"codemirror_mode": { "codemirror_mode": {
"name": "ipython", "name": "ipython",
"version": 2 "version": 3
}, },
"file_extension": ".py", "file_extension": ".py",
"mimetype": "text/x-python", "mimetype": "text/x-python",
"name": "python", "name": "python",
"nbconvert_exporter": "python", "nbconvert_exporter": "python",
"pygments_lexer": "ipython2", "pygments_lexer": "ipython3",
"version": "2.7.10" "version": "3.5.0"
} }
}, },
"nbformat": 4, "nbformat": 4,