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

LeetCode Topics

Database

0175-combine-two-tables
0176-second-highest-salary
0197-rising-temperature
0570-managers-with-at-least-5-direct-reports
0595-big-countries
1161-project-employees-i
1390-average-selling-price
1509-replace-employee-id-with-the-unique-identifier
1827-invalid-tweets

Linked List

0019-remove-nth-node-from-end-of-list
0021-merge-two-sorted-lists
0083-remove-duplicates-from-sorted-list
0141-linked-list-cycle
0142-linked-list-cycle-ii
0148-sort-list
0908-middle-of-the-linked-list
2903-insert-greatest-common-divisors-in-linked-list

Recursion

0021-merge-two-sorted-lists

Hash Table

0003-longest-substring-without-repeating-characters
0141-linked-list-cycle
0142-linked-list-cycle-ii
0202-happy-number
0347-top-k-frequent-elements
0349-intersection-of-two-arrays
0350-intersection-of-two-arrays-ii
0451-sort-characters-by-frequency
0532-k-diff-pairs-in-an-array
1297-maximum-number-of-balloons
1786-count-the-number-of-consistent-strings
2502-sort-the-people

Math

0202-happy-number
1642-water-bottles
2903-insert-greatest-common-divisors-in-linked-list

Two Pointers

0011-container-with-most-water
0015-3sum
0019-remove-nth-node-from-end-of-list
0028-find-the-index-of-the-first-occurrence-in-a-string
0141-linked-list-cycle
0142-linked-list-cycle-ii
0148-sort-list
0202-happy-number
0349-intersection-of-two-arrays
0350-intersection-of-two-arrays-ii
0443-string-compression
0455-assign-cookies
0532-k-diff-pairs-in-an-array
0908-middle-of-the-linked-list

Simulation

1642-water-bottles
2006-find-the-student-that-will-replace-the-chalk

Divide and Conquer

0148-sort-list
0347-top-k-frequent-elements

Sorting

0015-3sum
0148-sort-list
0179-largest-number
0347-top-k-frequent-elements
0349-intersection-of-two-arrays
0350-intersection-of-two-arrays-ii
0435-non-overlapping-intervals
0451-sort-characters-by-frequency
0455-assign-cookies
0532-k-diff-pairs-in-an-array
2502-sort-the-people

Merge Sort

0148-sort-list

Array

0011-container-with-most-water
0015-3sum
0055-jump-game
0152-maximum-product-subarray
0179-largest-number
0238-product-of-array-except-self
0334-increasing-triplet-subsequence
0347-top-k-frequent-elements
0349-intersection-of-two-arrays
0350-intersection-of-two-arrays-ii
0435-non-overlapping-intervals
0455-assign-cookies
0532-k-diff-pairs-in-an-array
0624-maximum-distance-in-arrays
0890-lemonade-change
1046-max-consecutive-ones-iii
1496-lucky-numbers-in-a-matrix
1511-count-number-of-teams
1786-count-the-number-of-consistent-strings
1791-richest-customer-wealth
2006-find-the-student-that-will-replace-the-chalk
2502-sort-the-people

Prefix Sum

0238-product-of-array-except-self
1046-max-consecutive-ones-iii
2006-find-the-student-that-will-replace-the-chalk

String

0003-longest-substring-without-repeating-characters
0028-find-the-index-of-the-first-occurrence-in-a-string
0032-longest-valid-parentheses
0179-largest-number
0443-string-compression
0451-sort-characters-by-frequency
1297-maximum-number-of-balloons
1786-count-the-number-of-consistent-strings
2502-sort-the-people

Sliding Window

0003-longest-substring-without-repeating-characters
1046-max-consecutive-ones-iii

Binary Search

0349-intersection-of-two-arrays
0350-intersection-of-two-arrays-ii
0532-k-diff-pairs-in-an-array
1046-max-consecutive-ones-iii
2006-find-the-student-that-will-replace-the-chalk

Greedy

0011-container-with-most-water
0055-jump-game
0179-largest-number
0334-increasing-triplet-subsequence
0435-non-overlapping-intervals
0455-assign-cookies
0624-maximum-distance-in-arrays
0890-lemonade-change

Counting

0347-top-k-frequent-elements
0451-sort-characters-by-frequency
1297-maximum-number-of-balloons
1786-count-the-number-of-consistent-strings

Dynamic Programming

0032-longest-valid-parentheses
0055-jump-game
0152-maximum-product-subarray
0435-non-overlapping-intervals
1511-count-number-of-teams

Stack

0032-longest-valid-parentheses
0094-binary-tree-inorder-traversal
0144-binary-tree-preorder-traversal

Matrix

1496-lucky-numbers-in-a-matrix
1791-richest-customer-wealth

Binary Indexed Tree

1511-count-number-of-teams

Heap (Priority Queue)

0347-top-k-frequent-elements
0451-sort-characters-by-frequency

Bucket Sort

0347-top-k-frequent-elements
0451-sort-characters-by-frequency

Tree

0094-binary-tree-inorder-traversal
0100-same-tree
0101-symmetric-tree
0144-binary-tree-preorder-traversal
0530-minimum-absolute-difference-in-bst

Depth-First Search

0094-binary-tree-inorder-traversal
0100-same-tree
0101-symmetric-tree
0144-binary-tree-preorder-traversal
0530-minimum-absolute-difference-in-bst

Binary Tree

0094-binary-tree-inorder-traversal
0100-same-tree
0101-symmetric-tree
0144-binary-tree-preorder-traversal
0530-minimum-absolute-difference-in-bst

Breadth-First Search

0100-same-tree
0101-symmetric-tree
0530-minimum-absolute-difference-in-bst

Binary Search Tree

0530-minimum-absolute-difference-in-bst

Bit Manipulation

1786-count-the-number-of-consistent-strings

Number Theory

2903-insert-greatest-common-divisors-in-linked-list

Quickselect

0347-top-k-frequent-elements

String Matching

0028-find-the-index-of-the-first-occurrence-in-a-string