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A collection of LeetCode questions to ace the coding interview! - Created using LeetHub v2

LeetCode Topics

Array

Problem Name	Difficulty
0001-two-sum
0026-remove-duplicates-from-sorted-array
0066-plus-one
0219-contains-duplicate-ii	Easy
0238-product-of-array-except-self
0268-missing-number
0792-binary-search
0890-lemonade-change
1217-relative-sort-array
1580-shuffle-the-array
1584-average-salary-excluding-the-minimum-and-maximum-salary
1677-matrix-diagonal-sum
1798-max-number-of-k-sum-pairs
1950-sign-of-the-product-of-an-array
2058-concatenation-of-array
2616-maximal-score-after-applying-k-operations
2624-difference-between-element-sum-and-digit-sum-of-an-array
2794-maximum-number-of-moves-in-a-grid
3194-find-words-containing-character
3522-find-the-power-of-k-size-subarrays-i

Hash Table

Problem Name	Difficulty
0001-two-sum
0219-contains-duplicate-ii	Easy
0242-valid-anagram
0268-missing-number
1217-relative-sort-array
1798-max-number-of-k-sum-pairs

Math

Problem Name	Difficulty
0009-palindrome-number
0066-plus-one
0070-climbing-stairs
0258-add-digits
0268-missing-number
0319-bulb-switcher
1013-fibonacci-number
1406-subtract-the-product-and-sum-of-digits-of-an-integer
1444-number-of-steps-to-reduce-a-number-to-zero
1630-count-odd-numbers-in-an-interval-range
1950-sign-of-the-product-of-an-array
2383-add-two-integers
2491-smallest-even-multiple
2556-convert-the-temperature
2608-count-the-digits-that-divide-a-number
2624-difference-between-element-sum-and-digit-sum-of-an-array
2903-insert-greatest-common-divisors-in-linked-list

String

Problem Name	Difficulty
0014-longest-common-prefix
0028-find-the-index-of-the-first-occurrence-in-a-string
0058-length-of-last-word
0242-valid-anagram
0957-minimum-add-to-make-parentheses-valid
1205-defanging-an-ip-address
1807-partitioning-into-minimum-number-of-deci-binary-numbers
1894-merge-strings-alternately
3194-find-words-containing-character
3195-separate-black-and-white-balls
3379-score-of-a-string
3451-string-compression-iii

Trie

Problem Name	Difficulty
0014-longest-common-prefix

Linked List

Problem Name	Difficulty
0021-merge-two-sorted-lists
0083-remove-duplicates-from-sorted-list
2903-insert-greatest-common-divisors-in-linked-list

Recursion

Problem Name	Difficulty
0021-merge-two-sorted-lists
1013-fibonacci-number

Two Pointers

Problem Name	Difficulty
0026-remove-duplicates-from-sorted-array
0028-find-the-index-of-the-first-occurrence-in-a-string
1798-max-number-of-k-sum-pairs
1894-merge-strings-alternately
3195-separate-black-and-white-balls

String Matching

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

Simulation

Problem Name	Difficulty
0258-add-digits
2058-concatenation-of-array

Number Theory

Problem Name	Difficulty
0258-add-digits
2491-smallest-even-multiple
2903-insert-greatest-common-divisors-in-linked-list

Brainteaser

Problem Name	Difficulty
0319-bulb-switcher

Binary Search

Problem Name	Difficulty
0268-missing-number
0792-binary-search

Bit Manipulation

Problem Name	Difficulty
0268-missing-number
1444-number-of-steps-to-reduce-a-number-to-zero

Sorting

Problem Name	Difficulty
0242-valid-anagram
0268-missing-number
1217-relative-sort-array
1584-average-salary-excluding-the-minimum-and-maximum-salary
1798-max-number-of-k-sum-pairs

Greedy

Problem Name	Difficulty
0890-lemonade-change
0957-minimum-add-to-make-parentheses-valid
1807-partitioning-into-minimum-number-of-deci-binary-numbers
2616-maximal-score-after-applying-k-operations
3195-separate-black-and-white-balls

Heap (Priority Queue)

Problem Name	Difficulty
2616-maximal-score-after-applying-k-operations

Dynamic Programming

Problem Name	Difficulty
0070-climbing-stairs
1013-fibonacci-number
2794-maximum-number-of-moves-in-a-grid

Matrix

Problem Name	Difficulty
1677-matrix-diagonal-sum
2794-maximum-number-of-moves-in-a-grid

Database

Problem Name	Difficulty
0175-combine-two-tables
0176-second-highest-salary	Medium
0177-nth-highest-salary	Medium
0181-employees-earning-more-than-their-managers	Easy
0182-duplicate-emails	Easy
0183-customers-who-never-order	Easy
0511-game-play-analysis-i	Easy
0584-find-customer-referee	Easy
0586-customer-placing-the-largest-number-of-orders	Easy
0596-classes-with-at-least-5-students	Easy
0620-not-boring-movies
1193-monthly-transactions-i	Medium

Stack

Problem Name	Difficulty
0155-min-stack
0957-minimum-add-to-make-parentheses-valid

Memoization

Problem Name	Difficulty
0070-climbing-stairs
1013-fibonacci-number

Sliding Window

Problem Name	Difficulty
0219-contains-duplicate-ii	Easy
3522-find-the-power-of-k-size-subarrays-i

Counting Sort

Problem Name	Difficulty
1217-relative-sort-array

Prefix Sum

Problem Name	Difficulty
0238-product-of-array-except-self

Design

Problem Name	Difficulty
0155-min-stack