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Personal Notes
Daily Coding Problem
- Count Primes (Leetcode 204) (Sieve of Eratosthenes) (DCP
- ***Serialize and Deserialize Binary Tree (Leetcode 297) (DCP 3)
Miscellaneous
- ***Encode and Decode Strings
- Shuffle an Array
Math
Arrays
Binary Search
Stack
Heap
Intervals pattern
Linked Lists
- Copy List with Random Pointer (Leetcode 138)
- Merge K Sorted Lists (Leetcode 23)
Trees
Tries
- Implement Trie (Prefix Tree) (Leetcode 208)
- Phone Directory [To be Done]
Graphs
Sliding Window Pattern
Greedy
DFS
BFS
- Populating Next Right Pointers in Each Node (Leetcode 116)
Matrix
Two Pointers
Strings
Recursion
DP
Bit Manipulation
Prefix Sum
- Subarray Sum Equals K (Leetcode 560)
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Graphs
Topological Sort

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Last updated 2 years ago