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Author SHA1 Message Date
Donne Martin 15ed55a7d4 Polish quicksort challenge and solution 
Add None input test case.  Remove difficult to read 'Pythonic' solution.  Update space complexity discussion.
 2016-02-25 05:49:31 -05:00
Donne Martin 4b5ce09e6c Add None input test case to selection sort challenge 2016-02-25 05:47:26 -05:00
Donne Martin a2b4978c2e Add None input test case to insertion sort 2016-02-25 05:47:15 -05:00
Donne Martin d8ac0b8fc6 Polish selection sort solution 2016-02-24 07:37:31 -05:00
Donne Martin 577ada7896 Polish selection sort challenge and solution 2016-02-24 06:27:54 -05:00
Donne Martin 031f3233a9 Update sort stack challenge unit test 2016-02-23 07:10:18 -05:00
Donne Martin 2b92f51a4e Polish set of stacks challenge 2016-02-23 06:13:05 -05:00
Donne Martin ba14cb0417 Add intermediate sort stack solution and test 2016-02-23 06:12:45 -05:00
Donne Martin d9b2d7144e Polish set of stacks solution 2016-02-21 16:21:37 -05:00
Donne Martin 7222f71f59 Polish queue list solution 2016-02-21 16:21:05 -05:00
Donne Martin 76da9ec98d Polish n stacks solution 2016-02-21 16:20:29 -05:00
Donne Martin 9c441e9f18 Polish find loop start solution. 2016-02-20 12:53:27 -05:00
Donne Martin 7a166bed67 Polish stack solution. 2016-02-20 08:11:49 -05:00
Donne Martin 08fabdf58d Tweak remove dupes solution to use a single node 'reference'. 2016-02-15 06:29:11 -05:00
Donne Martin 21add6f4f5 Rename list_of_chars to reverse_string. 2016-02-14 06:04:48 -05:00
Donne Martin 27a0bf786e Update remove dupes unit test to handle more cases. 2016-02-10 06:33:30 -05:00
Donne Martin 71cb434de7 Polish delete mid solution. 2016-02-10 06:32:31 -05:00
Donne Martin feb3ed3129 Polish add reverse solution. 2016-02-10 06:30:36 -05:00
Donne Martin b0a091f589 Polish rotation solution. 2016-02-10 06:30:11 -05:00
Donne Martin 75becf1afb Polish permutation solution. 2016-02-10 06:29:50 -05:00
Donne Martin 186a192c61 Update array compress unit test to match solution and challenge notebooks. 2016-02-10 06:29:22 -05:00
Donne Martin fe4c118812 Update final char case and unit test for #44. 2016-02-09 07:20:07 -05:00
Donne Martin af2f461239 Merge branch 'develop' 
* develop:
  Update compress challenge based on #44.
 2016-02-09 07:02:34 -05:00
Donne Martin 2084bbf5c9 Update compress challenge based on #44. 2016-02-09 07:00:41 -05:00
Donne Martin b53d7ba9ef Merge pull request #44 from donnemartin/develop 
Polish compress string solution
 2016-02-09 06:54:46 -05:00
Donne Martin 4953e6c114 Update compress solution so AAAAB becomes A4B. 
Previously the solution would yield A4B1, which doesn't have as much compression.
 2016-02-09 06:52:32 -05:00
Donne Martin 9bf96eabaa Polish compress solution. 2016-02-09 06:49:29 -05:00
Donne Martin 81f0f0c1af Merge branch 'irheart-reverse_string/check-inplace' 
* irheart-reverse_string/check-inplace:
  Add in-place reverse string test to solution notebook.
  Test for inplace modification of the array.
 2016-02-09 04:47:10 -05:00
Donne Martin eee55dfa80 Add in-place reverse string test to solution notebook. 2016-02-09 04:46:44 -05:00
Donne Martin 363105cfc0 Merge branch 'reverse_string/check-inplace' of git://github.com/irheart/interactive-coding-challenges into irheart-reverse_string/check-inplace 
* 'reverse_string/check-inplace' of git://github.com/irheart/interactive-coding-challenges:
  Test for inplace modification of the array.
 2016-02-09 04:40:31 -05:00
Donne Martin 784730685b Merge branch 'feature/polish-compression' into develop 
* feature/polish-compression:
  Rename alt compress solution.
  Fix indentation.
  Update author to hashhar's challenge.
 2016-02-09 04:36:07 -05:00
Donne Martin 668864aa62 Rename alt compress solution. 2016-02-09 04:35:09 -05:00
Donne Martin d9b5c57d5e Fix indentation. 2016-02-09 04:33:48 -05:00
Donne Martin 53d0ce9142 Update author to hashhar's challenge. 2016-02-09 04:33:09 -05:00
Donne Martin 06dbb2e3f7 Merge pull request #39 from hashhar/better-compression 
Code concerning Issue #38
 2016-02-09 04:29:06 -05:00
Donne Martin 7063af0022 Add .gitattributes. 2015-12-16 06:59:25 -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
Donne Martin 89d12dbeb7 Merge pull request #37 from superxiao/master 
Fix check_balance solution for a new test case
 2015-10-27 20:38:00 -04:00
Donne Martin 6276624914 Merge branch 'master' of https://github.com/donnemartin/interactive-coding-challenges 
* 'master' of https://github.com/donnemartin/interactive-coding-challenges:
  minor phrasing fix
 2015-08-23 08:08:58 -04:00
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 679f202c97 Merge pull request #34 from rafadaguiar/master 
Tweaked stack sort algorithm discussion.
 2015-08-17 07:08:47 -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 c595ea0fd7 Fixed nbviewer links for path between two nodes graph challenge. 2015-08-14 19:29:05 -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 10e6d75be9 Fixed challenge notebook nbviewer link. 2015-08-11 21:34:24 -04:00
Donne Martin 6e8a0048a8 Added n pairs parentheses challenge. 2015-08-11 21:14:09 -04:00
Donne Martin 7495668fe0 Cleaned up n pairs parentheses challenge notebook. 2015-08-11 21:13:47 -04:00
Donne Martin c868f891e7 Cleaned up n pairs parentheses solution notebook and unit test. 2015-08-11 21:13:35 -04:00
Donne Martin d35af98522 Merge pull request #30 from rishihot55/n_pairs_parentheses 
Added n-pairs parentheses challenge
 2015-08-10 17:06:00 -04:00
Donne Martin 1959772237 Added TODO to include more optimal solutions to maximizing xor challenge. 2015-08-09 07:38:58 -04:00
Donne Martin c1e759f3da Cleaned up cell execution numbers, minor PEP8 line break tweak. 2015-08-09 07:30:37 -04:00
Donne Martin 039baaa116 Renamed coinchange to coin_change. 2015-08-09 07:26:44 -04:00
Donne Martin aaea7a8bfc Renamed coinchange to coin_change. 2015-08-09 07:26:24 -04:00
Donne Martin f74d40926c Renamed coinchange to coin_change. 2015-08-09 07:25:08 -04:00
Donne Martin 9ed7c05318 Moved Hanoi challenge from stacks_queues to recursion_dynamic. 2015-08-09 07:21:18 -04:00
Donne Martin db0dfc66a8 Moved Hanoi challenge from stacks_queues to recursion_dynamic. 2015-08-09 07:20:49 -04:00
Donne Martin 780b72807c Fixed path between two nodes challenge summary. 2015-08-06 06:10:30 -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 bf0c1e927f Renamed the Graph and Trees section header. 2015-08-04 19:56:50 -04:00
Donne Martin bf689c438e Tweaked dfs tree challenge description, specifically noting it for trees since a similar graph challenge is coming. 2015-08-04 19:56:20 -04:00
Donne Martin 07ff8c2770 Tweaked bfs tree challenge description, specifically noting it for trees since a similar graph challenge is coming. 2015-08-04 19:55:55 -04:00
Donne Martin 9d05fa12b2 Tweaked graph challenge description. 2015-08-04 19:50:41 -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 91dc014573 Added enum34, which is a better way to create enums in Python 3.4. Package enum34 brings this capability to previous versions of Python. 2015-08-03 06:25:34 -04:00
Donne Martin 92e0318952 Added basic graph implementation challenge. 2015-08-03 06:24:38 -04:00
Donne Martin 9d1a68fb40 Fixed tree height challenge notebook nbviewer link. 2015-08-02 10:54:44 -04:00
Donne Martin 0f55ccf38d Added tree height challenge. 2015-08-02 10:53:35 -04:00
Donne Martin 5df49199b9 Fixed dfs and bfs descriptions as they were swapped in regards to order traversals. 2015-08-02 10:51:31 -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