Leetcode Solutions

Arrays and Hashing

1. Contains Duplicate [ LC-217 | Easy ]

2. Valid Anagram [ LC-242 | Easy ]

3. Two Sum [ LC-1 | Easy ]

4. Group Anagrams [ LC-49 | Medium ]

5. Top K Frequent Elements [ LC-347 | Medium ]

6. Product of Array Except Self [ LC-238 | Medium ]

7. Valid Sudoku [ LC-36 | Medium ]

8. Longest Consecutive Sequence [ LC-128 | Medium ]

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Two Pointer

1. Valid Palindrome [ LC-125 | Easy ]

2. Two Sum II - Input Array is Sorted [ LC-167 | Medium ]

3. Three Sum [ LC-15 | Medium ]

4. Container With Most Water [ LC-11 | Medium ]

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Sliding Window

1. Best Time to Buy and Sell Stocks [ LC-121 | Easy ]

2. Longest Substring Without Repeating Characters [ LC-3 | Medium ]

3. Longest Repeating Character Replacement [ LC-424 | Medium ]

4. Permutation in String [ LC-567 | Medium ]

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Stack

1. Valid Parentheses [ LC-20 | Easy ]

2. Min Stack [ LC-155 | Medium ]

3. Evaluate Reverse Polish Notation [ LC-150 | Medium ]

4. Generate Parentheses [ LC-22 | Medium ]

5. Daily Temperatures [ LC-739 | Medium ]

6. Car Fleet [ LC-853 | Medium ]

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Binary Search

1. Binary Search [ LC-704 | Easy ]

2. Search 2D Matrix [ LC-74 | Medium ]

3. Koko Eating Bananas [ LC-875 | Medium ]

4. Search In Rotated Sorted Array [ LC-33 | Medium ]

5. Find Minimum In Rotated Sorted Array [ LC-153 | Medium ]

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Linked List

1. Reverse Linked List [ LC-206 | Easy ]

2. Merge Two Sorted Lists [ LC-21 | Easy ]

3. Reorder List [ LC-143 | Medium ]

4. Remove Nth Node From End of List [ LC-19 | Medium ]

5. Copy List With Random Pointer [ LC-138 | Medium ]

6. Add Two Numbers [ LC-2 | Medium ]

7. Linked List Cycle [ LC-141 | Easy ]

8. Find The Duplicate Number [ LC-287 | Medium ]

9. LRU Cache [ LC-146 | Medium ]