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Just Know Most Importance Concept
1. Array & Hashing
| Problems |
| Contains Duplicate |
| Valid Anagram |
| Two Sum |
| Group Anagrams |
| Top K Frequent Elements |
| Product of Array Except Self |
| Valid Sudoku |
| Encode and Decode Strings |
| Longest Consecutive Sequence |
2-1. Two Pointers
|
Problems
|
| Two Sum II Input Array Is Sorted |
| 3Sum |
| Container With Most Water |
| Trapping Rain Water |
2-2. Stack
|
Problems
|
| Min Stack |
| Evaluate Reverse Polish Notation |
| Generate Parentheses |
| Daily Temperatures |
| Car Fleet |
| Largest Rectangle In Histogram. Trees |
3-1. Binary Search
|
Problems
|
| Search a 2D Matrix |
| Koko Eating Bananas |
| Find Minimum In Rotated Sorted Array |
| Search In Rotated Sorted Array |
| Time Based Key Value Store |
| Median of Two Sorted Arrays |
3-2. Sliding Window
|
Problems
|
| Longest Substring Without Repeating Characters |
| Longest Repeating Character Replacement |
| Permutation In String |
| Minimum Window Substring |
| Sliding Window Maximum |
3-3 Linked List
4-1 Trees
5-1 Tries
|
Problems
|
| Design Add And Search Words Data Structure |
| Word Search II |
5-2 Backtracking
| Problems |
| Combination Sum |
| Permutations |
| Subsets II |
| Combination Sum II |
| Word Search |
| Palindrome Partitioning |
| Letter Combinations of a Phone Number |
| N Queens |
6-1 Heap / Priority Queue
| Problems |
| Last Stone Weight |
| K Closest Points to Origin |
| Kth Largest Element In An Array |
| Task Scheduler |
| Design Twitter |
| Find Median From Data Stream |
6-2 Graphs
6-3 1-D Dynamic Programming
7-1 Intervals
| Problems |
| Merge Intervals |
| Non Overlapping Intervals |
| Meeting Rooms |
| Meeting Rooms II |
| Minimum Interval to Include Each Query |
7-2 Greedy
| Problems |
| Jump Game |
| Jump Game II |
| Gas Station |
| Hand of Straights |
| Merge Triplets to Form Target Triplet |
| Partition Labels |
| Valid Parenthesis String |
7-3 Advanced Graphs
| Problems |
| Min Cost to Connect All Points |
| Network Delay Time |
| Swim In Rising Water |
| Alien Dictionary |
| Cheapest Flights Within K Stops |
7-4 2-D Dynamic Programming
7-5 Bit Manipulation
| Problems |
| Number of 1 Bits |
| Counting Bits |
| Reverse Bits |
| Missing Number |
| Sum of Two Integers |
| Reverse Integer |
8-1 Math & Geometry
| Problems |
| Spiral Matrix |
| Set Matrix Zeroes |
| Happy Number |
| Plus One |
| Pow(x, n) |
| Multiply Strings |
| Detect Squares |
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