56 Commits

Author	SHA1	Message	Date
z123	4306797043	Fixed issues with node state.	2016-05-08 11:22:47 -07:00
Donne Martin	358791fbbc	Update dfs solution complexity discussion	2016-03-02 07:50:28 -05:00
Donne Martin	de0e70de4f	Polish bst challenge and solution ... Add root is None input test case. Update time and space complexity discussion.	2016-03-01 07:03:37 -05:00
Donne Martin	fbf546ccc3	Update template notebook headers to render properly on nbviewer, update author link.	2015-12-11 05:19:33 -05:00
Donne Martin	5d1f8ae79e	Add bst successor challenge.	2015-12-02 07:14:34 -05:00
Xiaojian Wang	edfbec618f	Fix check_balance solution for a new test case	2015-10-09 22:53:42 -07:00
Donne Martin	1f45095f60	Added three state variable visit_state which will be useful for more advanced challenges such as topological sort.	2015-08-23 08:08:46 -04:00
Donne Martin	82b74ca7b4	Revised path exists challenge algorithm discussion.	2015-08-16 08:23:26 -04:00
Donne Martin	6b269d0f45	Updated bst to keep track of its parent and to return the node it inserts.	2015-08-16 08:21:11 -04:00
Donne Martin	f26f61e949	Added bst validate challenge.	2015-08-14 19:30:09 -04:00
Donne Martin	5a697d7e7c	Fixed Big O space complexity.	2015-08-13 06:52:32 -04:00
Donne Martin	224aef1d47	Fixed Big O space complexities.	2015-08-13 06:52:15 -04:00
Donne Martin	e50dff94b0	Fixed Big O space complexity.	2015-08-13 06:51:53 -04:00
Donne Martin	d99db4e110	Fixed Big O complexities.	2015-08-13 06:48:52 -04:00
Donne Martin	d6efaca8d8	Fixed whitespace for PEP8.	2015-08-13 06:48:08 -04:00
Donne Martin	53034144d4	Added binary tree balance check challenge.	2015-08-06 06:09:30 -04:00
Donne Martin	bf4222d6e1	Added tree level lists challenge.	2015-08-05 18:17:27 -04:00
Donne Martin	0c0ea408ee	Added min height bst challenge.	2015-08-05 18:16:26 -04:00
Donne Martin	d098e67ffd	Saved tree height challenge solution so it can be reused as a component to other related challenges.	2015-08-05 18:15:03 -04:00
Donne Martin	b109b6f8cc	Simplified challenge coding and unit tests by working with the node directly as opposed to node.id or node.data, which is more natural when writing coding challenges.	2015-08-05 06:14:44 -04:00
Donne Martin	1c5f34eb3e	Added graph path exists challenge.	2015-08-05 05:49:41 -04:00
Donne Martin	74d25491ca	Tweaked ordering of graph and bst challenges.	2015-08-05 05:47:02 -04:00
Donne Martin	25eaf0224a	Simplified check to determine if there are items in the queue.	2015-08-05 05:45:30 -04:00
Donne Martin	370ceaf414	Simplified check to determine if there are items in the queue.	2015-08-05 05:45:02 -04:00
Donne Martin	bad87c9f87	Added graph bfs challenge.	2015-08-04 20:02:28 -04:00
Donne Martin	43eb3f84fa	Added graph dfs challenge.	2015-08-04 20:01:59 -04:00
Donne Martin	1e5ff4f465	Added results.py, which helps with testing graph and tree problems.	2015-08-04 19:46:22 -04:00
Donne Martin	acc72a8b8a	Added utils/__init__.py	2015-08-04 19:45:38 -04:00
Donne Martin	ab69f7d066	Reworked graph challenge.	2015-08-04 19:37:05 -04:00
Donne Martin	77438319a5	Removed unused import statements, fixed compile error on skeleton challenge code.	2015-08-04 19:36:05 -04:00
Donne Martin	706ccd3256	Reworked tree dfs unit tests.	2015-08-04 19:35:19 -04:00
Donne Martin	db798ed6a7	Reworked tree bfs unit tests.	2015-08-04 19:34:54 -04:00
Donne Martin	72e133a96c	Reworked bst unit tests.	2015-08-04 19:33:42 -04:00
Donne Martin	9dc4116256	Revised constraints and algorithm. Added comment denoting key/value for each dictionary in the code section.	2015-08-04 08:09:16 -04:00
Donne Martin	92e0318952	Added basic graph implementation challenge.	2015-08-03 06:24:38 -04:00
Donne Martin	0f55ccf38d	Added tree height challenge.	2015-08-02 10:53:35 -04:00
Donne Martin	13d08b80fd	Simpilfied depth first search challenge.	2015-08-01 17:48:52 -04:00
Donne Martin	332230c3a1	Simpilfied breadth first search challenge.	2015-08-01 17:48:12 -04:00
Donne Martin	31058abf3a	Simpilfied bst challenge.	2015-08-01 17:44:14 -04:00
Donne Martin	e55c7ee1c6	Revised dfs challenge to be more self contained for simplicity.	2015-08-01 16:47:41 -04:00
Donne Martin	69f68287e3	Revised bfs challenge to be more self contained for simplicity.	2015-08-01 16:47:29 -04:00
Donne Martin	a0b6421f79	Removing bst implementation, tree challenges will be more independent for simplicity.	2015-08-01 16:46:40 -04:00
Donne Martin	4fc25a0a98	Updated solution notebook nbviewer link.	2015-08-01 09:41:28 -04:00
Donne Martin	bf5f54dc7b	Updated solution notebook nbviewer link.	2015-08-01 09:41:01 -04:00
Donne Martin	f672839f7d	Updated solution notebook nbviewer link.	2015-08-01 09:40:35 -04:00
Donne Martin	11f94f9ba8	Removed mention of queue as those are potential hints in solving the problem.	2015-08-01 09:31:52 -04:00
Donne Martin	a6cc0f266c	Added tree depth first search challenge.	2015-08-01 09:26:28 -04:00
Donne Martin	884d8aca80	Added tree breadth first search challenge.	2015-08-01 09:26:03 -04:00
Donne Martin	a6c7f71379	Added binary search tree challenge.	2015-08-01 09:25:14 -04:00
Donne Martin	757eca26f1	Added unit testing utility to redirect print output to help validate some functions.	2015-08-01 09:24:19 -04:00