DSA-Leetcode

Collection of LeetCode questions to ace the coding interview! - Created using LeetHub-3.0

LeetCode Topics

Array

Problem Name	Difficulty
0001-two-sum	Easy
0011-container-with-most-water	Medium
0016-3sum-closest	Medium
0039-combination-sum	Medium
0046-permutations	Medium
0074-search-a-2d-matrix	Medium
0078-subsets	Medium
0080-remove-duplicates-from-sorted-array-ii	Medium
0088-merge-sorted-array	Easy
0090-subsets-ii	Medium
0121-best-time-to-buy-and-sell-stock	Easy
0128-longest-consecutive-sequence	Medium
0167-two-sum-ii-input-array-is-sorted	Medium
0198-house-robber	Medium
0213-house-robber-ii	Medium
0217-contains-duplicate	Easy
0496-next-greater-element-i	Easy
0503-next-greater-element-ii	Medium
0643-maximum-average-subarray-i	Easy
0739-daily-temperatures	Medium
0819-most-common-word	Easy
0875-koko-eating-bananas	Medium
1004-max-consecutive-ones-iii	Medium
1482-minimum-number-of-days-to-make-m-bouquets	Medium
1552-magnetic-force-between-two-balls	Medium
2016-maximum-difference-between-increasing-elements	Easy
2226-maximum-candies-allocated-to-k-children	Medium

Binary Search

Problem Name	Difficulty
0074-search-a-2d-matrix	Medium
0167-two-sum-ii-input-array-is-sorted	Medium
0875-koko-eating-bananas	Medium
1004-max-consecutive-ones-iii	Medium
1482-minimum-number-of-days-to-make-m-bouquets	Medium
1552-magnetic-force-between-two-balls	Medium
2226-maximum-candies-allocated-to-k-children	Medium

Dynamic Programming

Problem Name	Difficulty
0121-best-time-to-buy-and-sell-stock	Easy
0198-house-robber	Medium
0213-house-robber-ii	Medium

Hash Table

Problem Name	Difficulty
0001-two-sum	Easy
0003-longest-substring-without-repeating-characters	Medium
0128-longest-consecutive-sequence	Medium
0217-contains-duplicate	Easy
0242-valid-anagram	Easy
0299-bulls-and-cows	Medium
0387-first-unique-character-in-a-string	Easy
0424-longest-repeating-character-replacement	Medium
0496-next-greater-element-i	Easy
0567-permutation-in-string	Medium
0819-most-common-word	Easy

Stack

Problem Name	Difficulty
0020-valid-parentheses	Easy
0155-min-stack	Medium
0496-next-greater-element-i	Easy
0503-next-greater-element-ii	Medium
0739-daily-temperatures	Medium
1614-maximum-nesting-depth-of-the-parentheses	Easy

Monotonic Stack

Problem Name	Difficulty
0496-next-greater-element-i	Easy
0503-next-greater-element-ii	Medium
0739-daily-temperatures	Medium

Sorting

Problem Name	Difficulty
0016-3sum-closest	Medium
0088-merge-sorted-array	Easy
0217-contains-duplicate	Easy
0242-valid-anagram	Easy
1552-magnetic-force-between-two-balls	Medium

String

Problem Name	Difficulty
0003-longest-substring-without-repeating-characters	Medium
0020-valid-parentheses	Easy
0242-valid-anagram	Easy
0299-bulls-and-cows	Medium
0387-first-unique-character-in-a-string	Easy
0424-longest-repeating-character-replacement	Medium
0567-permutation-in-string	Medium
0819-most-common-word	Easy
1614-maximum-nesting-depth-of-the-parentheses	Easy

Counting

Problem Name	Difficulty
0299-bulls-and-cows	Medium
0387-first-unique-character-in-a-string	Easy
0819-most-common-word	Easy

Two Pointers

Problem Name	Difficulty
0011-container-with-most-water	Medium
0016-3sum-closest	Medium
0080-remove-duplicates-from-sorted-array-ii	Medium
0088-merge-sorted-array	Easy
0167-two-sum-ii-input-array-is-sorted	Medium
0567-permutation-in-string	Medium

Greedy

Problem Name	Difficulty
0011-container-with-most-water	Medium

Sliding Window

Problem Name	Difficulty
0003-longest-substring-without-repeating-characters	Medium
0424-longest-repeating-character-replacement	Medium
0567-permutation-in-string	Medium
0643-maximum-average-subarray-i	Easy
1004-max-consecutive-ones-iii	Medium

Union-Find

Problem Name	Difficulty
0128-longest-consecutive-sequence	Medium

Queue

Problem Name	Difficulty
0387-first-unique-character-in-a-string	Easy

Prefix Sum

Problem Name	Difficulty
1004-max-consecutive-ones-iii	Medium

Backtracking

Problem Name	Difficulty
0039-combination-sum	Medium
0046-permutations	Medium
0078-subsets	Medium
0090-subsets-ii	Medium

Bit Manipulation

Problem Name	Difficulty
0078-subsets	Medium
0090-subsets-ii	Medium

Design

Problem Name	Difficulty
0155-min-stack	Medium

Matrix

Problem Name	Difficulty
0074-search-a-2d-matrix	Medium