30 days
- 9. LRU Cache — WIP
- Reorganize String
- 3. Two Sum
- Maximum Profit in Job Scheduling
- 1. Number of Islands
- 2. Merge Intervals
- 5. Trapping Rain Water
- Analyze user
- Put Marbles in Bags
- 2. Longest Substring Without Repeating Characters
- 3. 3Sum
- 1. Best Time to Buy And Sell Stock
- 7. Add Two Numbers
- median — WIP
- 5. Rotting Oranges
- 5. Top K Frequent Elements
- 1. Valid Parentheses
- 10. Merge k Sorted Lists
- 1. Climbing Stairs
- 6. Copy List With Random Pointer
- 8. Course Schedule
- 3. Koko Eating Bananas
- Generate Parentheses
- Maximum Subarray
- 3, Merged Sorted Array
- 9. Longest Consecutive Sequence
- Course Schedule II
- find median from two data stream