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All Projects → arpankg → ctci-python-solutions

arpankg / ctci-python-solutions

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Cracking the Coding Interview in Python 3. The solutions all have detailed explanations with visuals.

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cracking-the-coding-interviewinterview-practiceinterview-questionsinterview-preparationgayle-laakmann-mcdowell

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View All Similar Projects ➔

Cracking the Coding Interview in Python - Solutions with Explanations

Detailed explanations to the coding interview questions in CTCI. The solutions are written in Python 3.

If you find this useful, a Github star would be much appreciated!! ⭐ ⭐ ⭐

Arrays and Strings

Problem Number Problem Name Status
1.1 Is Unique Read Solution ✅
1.2 Check Permutation Read Solution ✅
1.3 URLify Read Solution ✅
1.4 Palindrome Permutation Read Solution ✅
1.5 One Away Read Solution ✅
1.6 String Compression Read Solution ✅
1.7 Rotate Matrix Read Solution ✅
1.8 Zero Matrix Read Solution ✅
1.9 String Rotation Read Solution ✅

Linked Lists

Problem Number Problem Name Status
2.1 Remove Dups Read Solution ✅
2.2 Return Kth to Last Read Solution ✅
2.3 Delete Middle Node Read Solution ✅
2.4 Partition Read Solution ✅
2.5 Sum List Read Solution ✅
2.6 Palindrome Read Solution ✅
2.7 Intersection Read Solution ✅
2.8 Loop Detection Read Solution ✅

Stacks and Queues

Problem Number Problem Name Status
3.1 Three In One Read Solution ✅
3.2 Stack Min Read Solution ✅
3.3 Stack of Plates Read Solution ✅
3.4 Queue via Stacks Read Solution ✅
3.5 Sort Stack ❌
3.6 Animal Shelter ❌

Trees and Graphs

Problem Number Problem Name Status
4.1 Route Between Nodes ❌
4.2 Minimal Tree ❌
4.3 List of Depths ❌
4.4 Check Balanced ❌
4.5 Validate BST ❌
4.6 Successor ❌
4.7 Build Order ❌
4.8 First Common Ancestor ❌
4.9 BST Sequence ❌
4.10 Check Subtree ❌
4.11 Random Node ❌
4.12 Paths with Sum ❌

Bit Manipulation

Problem Number Problem Name Status
5.1 Insertion ❌
5.2 Binary to String ❌
5.3 Flip Bit to Win ❌
5.4 Next Number ❌
5.5 Debugger ❌
5.6 Conversion ❌
5.7 Pairwise Swap ❌
5.8 Draw Line ❌

Object Oriented Design

Problem Number Problem Name Status
7.1 Deck of Cards ❌
7.2 Call Center ❌
7.3 Jukebox ❌
7.4 Parking Lot ❌
7.5 Online Book Reader ❌
7.6 Jigsaw ❌
7.7 Chat Server ❌
7.8 Othello ❌
7.9 Circular Array ❌

Recursion and Dynamic Programming

Problem Number Problem Name Status
8.1 Triple Step ❌
8.2 Robot in a Grid ❌
8.3 Magic Index ❌
8.4 Power Set ❌
8.5 Recursive Multiply ❌
8.6 Towers of Hanoi ❌
8.7 Permutation without Dups ❌
8.8 Permutation with Dups ❌
8.9 Parens ❌
8.10 Paint Fill ❌
8.11 Coins ❌
8.12 Eight Queens ❌
8.13 Stack of Boxes ❌
8.14 Boolean Evaluation ❌

Sorting and Searching

Problem Number Problem Name Status
10.1 Sorted Merge ❌
10.2 Group Anagram ❌
10.3 Search in Rotated Array ❌
10.4 Sorted Search, No Size ❌
10.5 Sparse Search ❌
10.6 Sort Big File ❌
10.7 Missing Int ❌
10.8 Find Duplicates ❌
10.9 Sorted Matrix Search ❌
10.10 Rank from Stream ❌
10.11 Peaks and Valleys ❌

Moderate

Problem Number Problem Name Status
16.1 Number Swapper Read Solution ✅
16.2 Word Frequencies Read Solution ✅
16.3 Intersection ❌
16.4 Tic Tac Win ❌
16.5 Factorial Zeros ❌
16.6 Smallest Difference ❌
16.7 Number Max ❌
16.8 English Int ❌
16.9 Operations ❌
16.10 Living People ❌
16.11 Diving Board ❌
16.12 XML Encoding ❌
16.13 Bisect Squares ❌
16.14 Best Line ❌
16.15 Master Mind ❌
16.16 Sub Sort ❌
16.17 Contiguous Sequence ❌
16.18 Pattern Matching ❌
16.19 Pond Sizes ❌
16.20 T9 ❌
16.21 Sum Swap ❌
16.22 Langton's Ant ❌
16.23 Rand7 from Rand5 ❌
16.24 Pairs with Sum ❌
16.25 LRU Cache ❌
16.26 Calculator ❌

Hard

Problem Number Problem Name Status
17.1 Add Without Plus ❌
17.2 Shuffle ❌
17.3 Random Set ❌
17.4 Missing Number ❌
17.5 Letters and Numbers ❌
17.6 Count of 2s ❌
17.7 Baby Names ❌
17.8 Circus Tower ❌
17.9 Kth Multiple ❌
17.10 Majority Element ❌
17.11 Word Distance ❌
17.12 BiNode ❌
17.13 Re-Space ❌
17.14 Smallest K ❌
17.15 Longest Word ❌
17.16 The Masseuse ❌
17.17 Multi Search ❌
17.18 Shortest Supersequence ❌
17.19 Missing Two ❌
17.20 Continuous Median ❌
17.21 Volume of Histogram ❌
17.22 Word Transformer ❌
17.23 Max Black Square ❌
17.24 Max Submatrix ❌
17.25 Word Rectangle ❌
17.26 Sparse Similarity ❌

If you find this useful, a Github star would be much appreciated!! ⭐ ⭐ ⭐

Contributing

Pull requests are welcome. For major changes, please open an issue to discuss what you want to change.

Contributors

Huge thanks to our contributors!

Note that the project description data, including the texts, logos, images, and/or trademarks, for each open source project belongs to its rightful owner. If you wish to add or remove any projects, please contact us at [email protected].