Grokking the Coding Interview

Introduction

1. Who should take this course.html

2. Course Overview - Grokking the Coding Interview Patterns for Coding Questions.html

Pattern Sliding Window

1. Introduction

   | Java | Python | C++ | Javascript |

2. Maximum Sum Subarray of Size K (easy)

   | Java | Python | C++ | Javascript |

3. Smallest Subarray with a given sum (easy)

   | Java | Python | C++ | Javascript |

4. Longest Substring with K Distinct Characters (medium)

   | Java | Python | C++ | Javascript |

5. Fruits into Baskets (medium)

   | Java | Python | C++ | Javascript |

6. No-repeat Substring (hard)

   | Java | Python | C++ | Javascript |

7. Longest Substring with Same Letters after Replacement (hard)

   | Java | Python | C++ | Javascript |

8. Longest Subarray with Ones after Replacement (hard)

   | Java | Python | C++ | Javascript |

9. Problem Challenge 1

   | Java | Python | C++ | Javascript |

10. Solution Review Problem Challenge 1

    Java | Python | C++ | Javascript |

11. Problem Challenge 2

    Java | Python | C++ | Javascript |

12. Solution Review Problem Challenge 2

    Java | Python | C++ | Javascript |

13. Problem Challenge 3

    Java | Python | C++ | Javascript |

14. Solution Review Problem Challenge 3

    Java | Python | C++ | Javascript |

15. Problem Challenge 4

    Java | Python | C++ | Javascript |

16. Solution Review Problem Challenge 4

    Java | Python | C++ | Javascript |

Pattern Two Pointers

1. Introduction

   | Java |

2. Pair with Target Sum (easy)

   | Java | Python | C++ | Javascript |

3. Remove Duplicates (easy)

   | Java | Python | C++ | Javascript |

4. Squaring a Sorted Array (easy)

   | Java | Python | C++ | Javascript |

5. Triplet Sum to Zero (medium)

   | Java | Python | C++ | Javascript |

6. Triplet Sum Close to Target (medium)

   | Javascript |

7. Triplets with Smaller Sum (medium)

   | Java | Python | C++ | Javascript |

8. Dutch National Flag Problem (medium)

   | Java | Python | C++ | Javascript |

9. Problem Challenge 1

   Java | Python | C++ | Javascript |

10. Solution Review Problem Challenge 2

    Java | Python | C++ | Javascript |

11. Problem Challenge 3

    Java | Python | C++ | Javascript |

12. Solution Review Problem Challenge 3

    Java | Python | C++ | Javascript |

Pattern Fast Slow pointers

1. Introduction

   | Java |

2. LinkedList Cycle (easy)

   | Java | Python | C++ | Javascript |

3. Start of LinkedList Cycle (medium)

   | Java | Python | C++ | Javascript |

4. Happy Number (medium)

   | Java | Python | C++ | Javascript |

5. Middle of the LinkedList (easy)

   | Java | Python | C++ | Javascript |

6. Problem Challenge 1

   | Java | Python | C++ | Javascript |

7. Solution Review Problem Challenge 1

   | Java | Python | C++ | Javascript |

8. Problem Challenge 2

   | Java | Python | C++ | Javascript |

9. Solution Review Problem Challenge 2

   | Java | Python | C++ | Javascript |

10. Problem Challenge 3

    Java | Python | C++ | Javascript |

11. Solution Review Problem Challenge 3

    Java | Python | C++ | Javascript |

Pattern Merge Intervals

1. Introduction

   | Java |

2. Merge Intervals (medium)

   | Java | Python | C++ | Javascript |

3. Insert Interval (medium)

   | Java | Python | C++ | Javascript |

4. Intervals Intersection (medium)

   | Java | Python | C++ | C++ | Javascript |

5. Conflicting Appointments (medium)

   | Java | Python | C++ | Javascript |

6. Problem Challenge 1

   | Java | Python | C++ | Javascript |

7. Solution Review Problem Challenge 1

   | Java | Python | C++ | Javascript |

8. Problem Challenge 2

   | Java | Python | C++ | Javascript |

9. Solution Review Problem Challenge 2

   | Java | Python | C++ | Javascript |

10. Problem Challenge 3

    Java | Python | C++ | Javascript |

11. Solution Review Problem Challenge 3

    Java | Java | Python | Python | C++ | Javascript |

Pattern Cyclic Sort

1. Introduction

   | Java |

2. Cyclic Sort (easy)

   | Java | Python | C++ | Javascript |

3. Find the Missing Number (easy)

   | Java | Python | C++ | Javascript |

4. Find all Missing Numbers (easy)

   | Java | Python | C++ | Javascript |

5. Find the Duplicate Number (easy)

   | Java | Python | C++ | Javascript |

6. Find all Duplicate Numbers (easy)

   | Java | Python | C++ | Javascript |

7. Problem Challenge 1

   | Java | Python | C++ | Javascript |

8. Solution Review Problem Challenge 1

   | Java | Python | C++ | Javascript |

9. Problem Challenge 2

   | Java | Python | C++ | Javascript |

10. Solution Review Problem Challenge 2

    Java | Python | C++ | Javascript |

11. Problem Challenge 3

    Java | Python | C++ | Javascript |

12. Solution Review Problem Challenge 3

    Java | Python | C++ | Javascript |

Pattern In-place Reversal of a LinkedList

1. Introduction

   | Java |

2. Reverse a LinkedList (easy)

   | Java | Python | C++ | Javascript |

3. Reverse a Sub-list (medium)

   | Java | Python | C++ | Javascript |

4. Reverse every K-element Sub-list (medium)

   | Java | Python | C++ | Javascript |

5. Problem Challenge 1

   | Java | Python | C++ | Javascript |

6. Solution Review Problem Challenge 1

   | Java | Python | C++ | Javascript |

7. Problem Challenge 2

   | Java | Python | C++ | Javascript |

8. Solution Review Problem Challenge 2

   | Java | Python | C++ | Javascript |

Pattern Tree Breadth First Search

1. Introduction

   | Java |

2. Binary Tree Level Order Traversal (easy)

   | Java | Python | C++ | Javascript |

3. Reverse Level Order Traversal (easy)

   | Java | Python | C++ | Javascript |

4. Zigzag Traversal (medium)

   | Java | Python | C++ | Javascript |

5. Level Averages in a Binary Tree (easy)

   | Java | Python | C++ | Javascript |

6. Minimum Depth of a Binary Tree (easy)

   | Java | Python | C++ | Javascript |

7. Level Order Successor (easy)

   | Java | Python | C++ | Javascript |

8. Connect Level Order Siblings (medium)

   | Java | Python | C++ | Javascript |

9. Problem Challenge 1

   | Java | Python | C++ | Javascript |

10. Solution Review Problem Challenge 1

    Java | Python | C++ | Javascript |

11. Problem Challenge 2

    Java | Python | C++ | Javascript |

12. Solution Review Problem Challenge 2

    Java | Python | C++ | Javascript |

Pattern Tree Depth First Search

1. Introduction

   | Java |

2. Binary Tree Path Sum (easy)

   | Java | Python | C++ | Javascript |

3. All Paths for a Sum (medium)

   | Java | Python | C++ | Javascript |

4. Sum of Path Numbers (medium)

   | Java | Python | Python | C++ | Javascript |

5. Path With Given Sequence (medium)

   | Java | Python | C++ | Javascript |

6. Count Paths for a Sum (medium)

   | Java | Python | C++ | Javascript |

7. Problem Challenge 1

   | Java | Python | C++ | Javascript |

8. Solution Review Problem Challenge 1

   | Java | Python | C++ | Javascript |

9. Problem Challenge 2

   | Java | Python | C++ | Javascript |

10. Solution Review Problem Challenge 2

    Java | Python | C++ | Javascript |

Pattern Two Heaps

1. Find the Median of a Number Stream (medium)

   | Java | Python | C++ | Javascript |

Pattern Subsets

1. Introduction

   | Java |

2. Subsets (easy)

   | Java | Python | C++ | Javascript |

3. Subsets With Duplicates (easy)

   | Java | Python | C++ | Javascript |

4. Permutations (medium)

   | Java | Python | C++ | Javascript |

5. String Permutations by changing case (medium)

   | Java | Python | C++ | Javascript |

6. Balanced Parentheses (hard)

   | Java | Python | C++ | Javascript |

7. Unique Generalized Abbreviations (hard)

   | Java | Java | Python | C++ | Javascript |

8. Problem Challenge 1

   | Java | Python | C++ | Javascript |

9. Solution Review Problem Challenge 1

   | Java | Python | C++ | Javascript |

10. Problem Challenge 2

    Java | Python | C++ | Javascript |

11. Solution Review Problem Challenge 2

    Java | Python | C++ | Javascript |

12. Problem Challenge 3

    Java | Python | C++ | Javascript |

13. Solution Review Problem Challenge 3

    Java | Python | C++ | Javascript |

Pattern Modified Binary Search

1. Introduction

   | Java |

2. Order-agnostic Binary Search (easy)

   | Java | Python | C++ | Javascript |

3. Ceiling of a Number (medium)

   | Java | Python | C++ | Javascript |

4. Next Letter (medium)

   | Java | Python | C++ | Javascript |

5. Number Range (medium)

   | Java | Python | C++ | Javascript |

6. Search in a Sorted Infinite Array (medium)

   | Java | Python | C++ | Javascript |

7. Minimum Difference Element (medium)

   | Java | Python | C++ | Javascript |

8. Bitonic Array Maximum (easy)

   | Java | Python | C++ | Javascript |

9. Problem Challenge 1

   | Java | Python | C++ | Javascript |

10. Solution Review Problem Challenge 1

    Java | Python | C++ | Javascript |

11. Problem Challenge 2

    Java | Python | C++ | Javascript |

12. Solution Review Problem Challenge 2

    Java | Python | C++ | Javascript |

13. Problem Challenge 3

    Java | Python | C++ | Javascript |

14. Solution Review Problem Challenge 3

    Java | Python | C++ | Javascript |

Pattern Bitwise XOR

1. Introduction

   | Java | Python | C++ | Javascript |

2. Single Number (easy)

   | Java | Python | C++ | Javascript |

3. Two Single Numbers (medium)

   | Java | Python | C++ | Javascript |

4. Complement of Base 10 Number (medium)

   | Java | Python | C++ | Javascript |

5. Problem Challenge 1

   | Java | Python | C++ | Javascript |

6. Solution Review Problem Challenge 1

   | Java | Python | C++ | Javascript |

Pattern Top K Elements

1. Introduction

   | Java |

2. Top K Numbers (easy)

   | Java | Python | C++ | Javascript |

3. Kth Smallest Number (easy)

   | Java | Python | C++ | Javascript |

4. K Closest Points to the Origin (easy)

   Java | Python | C++ | Javascript |

5. Connect Ropes (easy)

   | Java | Python | C++ | Javascript |

6. Top K Frequent Numbers (medium)

   | Java | Python | C++ | Javascript |

7. Frequency Sort (medium)

   | Java | Python | C++ | Javascript |

8. Kth Largest Number in a Stream (medium)

   | Java | Python | C++ | Javascript |

9. K Closest Numbers (medium)

   Java | Python | C++ | Javascript |

10. Maximum Distinct Elements (medium)

    Java | Java | Python | C++ | Javascript |

11. Sum of Elements (medium)

    Java | Python | C++ | Javascript |

12. Rearrange String (hard)

    Java | Python | C++ | Javascript |

13. Problem Challenge 1

    Java | Python | C++ | Javascript |

14. Solution Review Problem Challenge 1

    Java | Python | C++ | Javascript |

15. Problem Challenge 2

    Java | Python | C++ | Javascript |

16. Solution Review Problem Challenge 2

    Java | Python | C++ | Javascript |

17. Problem Challenge 3

    Java | Python | C++ | Javascript |

18. Solution Review Problem Challenge 3

    Java | Python | C++ | Javascript |

Pattern K-way merge

1. Introduction

   | Java |

2. Merge K Sorted Lists (medium)

   | Java | Python | C++ | Javascript |

3. Kth Smallest Number in M Sorted Lists (Medium)

   | Java | Python | [C++](GrokkCode\15._Pattern_K-way_merge\3._Kth_Smallest_Number_in_M_Sorted_Lists_(Medium)\1.3Kth_Smallest_Number_in_M_Sorted_Lists_(Medium.html) | Javascript |

4. Kth Smallest Number in a Sorted Matrix (Hard)

   | Java | Java | Python | C++ | Javascript |

5. Smallest Number Range (Hard)

   | Java | Python | C++ | Javascript |

6. Problem Challenge 1

   | Java | Python | C++ | Javascript |

7. Solution Review Problem Challenge 1

   | Java | Python | C++ | Javascript |

Pattern 0 or 1 Knapsack (Dynamic Programming)

1. Introduction

   | Java |

2. 01 Knapsack (medium)

   | Java | Java | Java | Java |

3. Equal Subset Sum Partition (medium)

   | Java | Python | C++ | Javascript |

4. Subset Sum (medium)

   | Java | Python | C++ | Javascript |

5. Minimum Subset Sum Difference (hard)

   | Java | Python | C++ | Javascript |

6. Problem Challenge 1

   | Java | Python | C++ | Javascript |

7. Solution Review Problem Challenge 1

   | Java | Python | C++ | Javascript |

8. Problem Challenge 2

   | Java | Python | C++ | Javascript |

9. Solution Review Problem Challenge 2

   | Java | Python | C++ | Javascript |

Pattern Topological Sort (Graph)

1. Introduction

   | Java |

2. Topological Sort (medium)

   | Java | Python | C++ | Javascript |

3. Tasks Scheduling (medium)

   | Java | Java | Python | C++ | Javascript |

4. Tasks Scheduling Order (medium)

   | Java | Java | Python | C++ | Javascript |

5. All Tasks Scheduling Orders (hard)

   | Java | Java | Python | C++ | Javascript |

6. Alien Dictionary (hard)

   | Java | Java | Python | C++ | Javascript |

7. Problem Challenge 1

   | Java | Python | C++ | Javascript |

8. Solution Review Problem Challenge 1

   | Java | Python | C++ | Javascript |

9. Problem Challenge 2

   | Java | Python | C++ | Javascript |

10. Solution Review Problem Challenge 2

    Java | Python | C++ | Javascript |

Miscellaneous

1. Kth Smallest Number (hard)

   | Java | Python | C++ | Javascript | Java |

Conclusions

1. Where to Go from Here