Add special array problem

Add intersection of arrays

Implementing first unique character problem

Add set mismatch problem

Add path crossing

Add destination city problem

Update docs with disppeared number and identical pairs problems

Add identical pairs problem

Add missing numbers problem

Add sum range queries problem

Add pivot index problem

Add isomorphic strings

Add maximum balloons problem

Add majority element problem

Add planting flowers problem

Add remove element algorithm

Add length of last word problem

Add Pascal triangle algorithm

Add walls and gates graph problem

Add LRU Cache implementation

Add letter combinations algorithm

Add hashtable algorithms

Update documentation for two sum

Update matrix algorithms

Update matrix algorithms

Update matrix algorithms

Update graph alogorithms

Implement tree datastrucure algorithms

Add implementation of BST tree

Update doubly linked list datastructures and problems