LeetCodeProblems

I am sharing my solutions for leetCode problems

LeetCode Topics

Stack

Problem Name	Difficulty
0094-binary-tree-inorder-traversal
0144-binary-tree-preorder-traversal
0145-binary-tree-postorder-traversal
1802-number-of-students-unable-to-eat-lunch

Tree

Problem Name	Difficulty
0094-binary-tree-inorder-traversal
0098-validate-binary-search-tree
0108-convert-sorted-array-to-binary-search-tree
0144-binary-tree-preorder-traversal
0145-binary-tree-postorder-traversal
0501-find-mode-in-binary-search-tree

Depth-First Search

Problem Name	Difficulty
0094-binary-tree-inorder-traversal
0098-validate-binary-search-tree
0144-binary-tree-preorder-traversal
0145-binary-tree-postorder-traversal
0501-find-mode-in-binary-search-tree

Binary Tree

Problem Name	Difficulty
0094-binary-tree-inorder-traversal
0098-validate-binary-search-tree
0108-convert-sorted-array-to-binary-search-tree
0144-binary-tree-preorder-traversal
0145-binary-tree-postorder-traversal
0501-find-mode-in-binary-search-tree

Array

Problem Name	Difficulty
0014-longest-common-prefix	Easy
0026-remove-duplicates-from-sorted-array	Easy
0108-convert-sorted-array-to-binary-search-tree
1802-number-of-students-unable-to-eat-lunch
2195-time-needed-to-buy-tickets

Divide and Conquer

Problem Name	Difficulty
0108-convert-sorted-array-to-binary-search-tree

Binary Search Tree

Problem Name	Difficulty
0098-validate-binary-search-tree
0108-convert-sorted-array-to-binary-search-tree
0501-find-mode-in-binary-search-tree

Queue

Problem Name	Difficulty
1802-number-of-students-unable-to-eat-lunch
2195-time-needed-to-buy-tickets

Simulation

Problem Name	Difficulty
1802-number-of-students-unable-to-eat-lunch
2195-time-needed-to-buy-tickets

Hash Table

Problem Name	Difficulty
0013-roman-to-integer	Easy

Math

Problem Name	Difficulty
0002-add-two-numbers	Medium
0013-roman-to-integer	Easy

String

Problem Name	Difficulty
0013-roman-to-integer	Easy
0014-longest-common-prefix	Easy
0028-find-the-index-of-the-first-occurrence-in-a-string	Easy
0058-length-of-last-word	Easy

Trie

Problem Name	Difficulty
0014-longest-common-prefix	Easy

Linked List

Problem Name	Difficulty
0002-add-two-numbers	Medium
0021-merge-two-sorted-lists	Easy

Recursion

Problem Name	Difficulty
0002-add-two-numbers	Medium
0021-merge-two-sorted-lists	Easy

Two Pointers

Problem Name	Difficulty
0026-remove-duplicates-from-sorted-array	Easy
0028-find-the-index-of-the-first-occurrence-in-a-string	Easy

String Matching

Problem Name	Difficulty
0028-find-the-index-of-the-first-occurrence-in-a-string	Easy

Z Algorithm

Problem Name	Difficulty
0028-find-the-index-of-the-first-occurrence-in-a-string	Easy

Knuth–Morris–Pratt Algorithm

Problem Name	Difficulty
0028-find-the-index-of-the-first-occurrence-in-a-string	Easy

Boyer–Moore String-Search Algorithm

Problem Name	Difficulty
0028-find-the-index-of-the-first-occurrence-in-a-string	Easy