LiquidatorCoder / dsa-practice

DSA

Data Structures

1. Arrays

Problem	Difiiculty	Link	Solved
Non-decreasing arrays	🟢	🔗	✔️
Build Array from Permutation	🟢	🔗	✔️
Two Sum	🟢	🔗	✔️
Remove Duplicates from Sorted Array	🟢	🔗	✔️
Maximize the sum	🟢	🔗	✔️
Remove Element	🟢	🔗	✔️
Maximum Subarray	🟢	🔗	✔️
Transpose Matrix	🟢	🔗	✔️
Degree of an Array	🟢	🔗	✔️
Monk and Inversions	🟢	🔗	⛔
Contains Duplicate	🟢	🔗	✔️
Merge Sorted Array	🟢	🔗	✔️
Intersection of Two Arrays	🟢	🔗	✔️
Intersection of Two Arrays II	🟢	🔗	✔️
Best Time to Buy and Sell Stock	🟢	🔗	✔️
Convert 1D Array Into 2D Array	🟢	🔗	✔️
Reshape the Matrix	🟢	🔗	✔️
Subsets	🟠	🔗	✔️

2. Strings

Problem	Difiiculty	Link	Solved
Sort the Substring	🟢	🔗	✔️
Bracket sequences	🟢	🔗	⛔
Final Value of Variable After Performing Operations	🟢	🔗	✔️
Valid Parentheses	🟢	🔗	✔️
Reverse Words in a String III	🟢	🔗	✔️

3. Linked List

Problem	Difiiculty	Link	Solved
Convert Binary Number in a Linked List to Integer	🟢	🔗	✔️
Middle of the Linked List	🟢	🔗	✔️
Delete the Middle Node of a Linked List	🟠	🔗	✔️
Swap Nodes in Pairs	🟠	🔗	✔️
Remove Nth Node From End of List	🟠	🔗	✔️
Remove Duplicates from Sorted List	🟢	🔗	✔️

4. Tree

Problem	Difiiculty	Link	Solved
Binary Tree Inorder Traversal	🟢	🔗	✔️
Binary Tree Preorder Traversal	🟢	🔗	✔️
Binary Tree Postorder Traversal	🟢	🔗	✔️
Two Sum IV - Input is a BST	🟢	🔗	✔️

Algos

1. Binary Search

Problem	Difiiculty	Link	Solved
Binary Search	🟢	🔗	✔️
First Bad Version	🟢	🔗	✔️
Search Insert Position	🟢	🔗	✔️

2. Two Pointers

Problem	Difiiculty	Link	Solved
Squares of a Sorted Array	🟢	🔗	✔️
Rotate Array	🟠	🔗	✔️
Move Zeroes	🟢	🔗	✔️
Two Sum II	🟢	🔗	✔️
Reverse String	🟢	🔗	✔️
Remove Nth Node From End of List	🟠	🔗	✔️

3. Recursion/Backtracking

Problem	Difiiculty	Link	Solved
Subsets	🟠	🔗	✔️
Letter Case Permutation	🟠	🔗	✔️

4. Dynamic Programming

Problem	Difiiculty	Link	Solved
Fibonacci Number	🟢	🔗	✔️
Climbing Stairs	🟢	🔗	✔️
N-th Tribonacci Number	🟢	🔗	✔️

5. Bit manipulation

Problem	Difiiculty	Link	Solved
Subsets	🟠	🔗	✔️