⚡ LeetCode Solutions..

A curated collection of clean, optimal solutions to LeetCode algorithmic and database problems.

👉 leetcode.com/u/NRR_385

LeetCode Topics

String

Problem Name	Difficulty
0301-remove-invalid-parentheses	Hard
0844-backspace-string-compare	Easy
0856-score-of-parentheses	Medium
0921-minimum-add-to-make-parentheses-valid	Medium
1021-remove-outermost-parentheses	Easy
1047-remove-all-adjacent-duplicates-in-string	Easy
2390-removing-stars-from-a-string	Medium

Stack

Problem Name	Difficulty
0844-backspace-string-compare	Easy
0856-score-of-parentheses	Medium
0921-minimum-add-to-make-parentheses-valid	Medium
1021-remove-outermost-parentheses	Easy
1047-remove-all-adjacent-duplicates-in-string	Easy
2390-removing-stars-from-a-string	Medium

Bracket Sequences

Problem Name	Difficulty
0856-score-of-parentheses	Medium
0921-minimum-add-to-make-parentheses-valid	Medium
1021-remove-outermost-parentheses	Easy

Greedy

Problem Name	Difficulty
0921-minimum-add-to-make-parentheses-valid	Medium

Array

Problem Name	Difficulty
0121-best-time-to-buy-and-sell-stock	Easy
0169-majority-element	Easy
1051-height-checker	Easy
1207-unique-number-of-occurrences	Easy
3151-special-array-i	Easy

Hash Table

Problem Name	Difficulty
0169-majority-element	Easy
1207-unique-number-of-occurrences	Easy

Divide and Conquer

Problem Name	Difficulty
0169-majority-element	Easy

Sorting

Problem Name	Difficulty
0169-majority-element	Easy
1051-height-checker	Easy

Counting

Problem Name	Difficulty
0169-majority-element	Easy

Boyer–Moore Majority Vote Algorithm

Problem Name	Difficulty
0169-majority-element	Easy

Backtracking

Problem Name	Difficulty
0301-remove-invalid-parentheses	Hard

Breadth-First Search

Problem Name	Difficulty
0301-remove-invalid-parentheses	Hard

Simulation

Problem Name	Difficulty
0844-backspace-string-compare	Easy
2390-removing-stars-from-a-string	Medium

Two Pointers

Problem Name	Difficulty
0844-backspace-string-compare	Easy

Dynamic Programming

Problem Name	Difficulty
0121-best-time-to-buy-and-sell-stock	Easy

Counting Sort

Problem Name	Difficulty
1051-height-checker	Easy

Bubble Sort

Problem Name	Difficulty
1051-height-checker	Easy