Leetcode-Problems

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

LeetCode Topics

Hash Table

0013-roman-to-integer
0049-group-anagrams
0073-set-matrix-zeroes
0128-longest-consecutive-sequence
0205-isomorphic-strings
0242-valid-anagram
0268-missing-number
0349-intersection-of-two-arrays
0496-next-greater-element-i
0532-k-diff-pairs-in-an-array
0778-reorganize-string
0797-rabbits-in-forest
0807-custom-sort-string
0926-find-and-replace-pattern
1890-sum-of-beauty-of-all-substrings
2406-decode-the-message
3872-find-most-frequent-vowel-and-consonant

Math

0013-roman-to-integer
0029-divide-two-integers
0048-rotate-image
0050-powx-n
0069-sqrtx
0189-rotate-array
0204-count-primes
0268-missing-number
0539-minimum-time-difference
0556-next-greater-element-iii
0797-rabbits-in-forest
1018-largest-perimeter-triangle
1086-divisor-game
1642-water-bottles
2244-number-of-laser-beams-in-a-bank
2610-closest-prime-numbers-in-range
3336-water-bottles-ii

String

0005-longest-palindromic-substring
0008-string-to-integer-atoi
0013-roman-to-integer
0014-longest-common-prefix
0028-find-the-index-of-the-first-occurrence-in-a-string
0038-count-and-say
0049-group-anagrams
0125-valid-palindrome
0205-isomorphic-strings
0242-valid-anagram
0345-reverse-vowels-of-a-string
0539-minimum-time-difference
0556-next-greater-element-iii
0647-palindromic-substrings
0680-valid-palindrome-ii
0686-repeated-string-match
0778-reorganize-string
0807-custom-sort-string
0874-backspace-string-compare
0926-find-and-replace-pattern
0953-reverse-only-letters
1078-remove-outermost-parentheses
1128-remove-all-adjacent-duplicates-in-string
1320-remove-all-adjacent-duplicates-in-string-ii
1890-sum-of-beauty-of-all-substrings
1894-merge-strings-alternately
2021-remove-all-occurrences-of-a-substring
2137-final-value-of-variable-after-performing-operations
2244-number-of-laser-beams-in-a-bank
2406-decode-the-message
2471-minimum-amount-of-time-to-collect-garbage
3872-find-most-frequent-vowel-and-consonant

Array

0015-3sum
0018-4sum
0033-search-in-rotated-sorted-array
0034-find-first-and-last-position-of-element-in-sorted-array
0035-search-insert-position
0048-rotate-image
0049-group-anagrams
0053-maximum-subarray
0056-merge-intervals
0073-set-matrix-zeroes
0074-search-a-2d-matrix
0075-sort-colors
0090-subsets-ii
0118-pascals-triangle
0120-triangle
0121-best-time-to-buy-and-sell-stock
0128-longest-consecutive-sequence
0136-single-number
0153-find-minimum-in-rotated-sorted-array
0162-find-peak-element
0189-rotate-array
0204-count-primes
0268-missing-number
0287-find-the-duplicate-number
0349-intersection-of-two-arrays
0407-trapping-rain-water-ii
0410-split-array-largest-sum
0455-assign-cookies
0496-next-greater-element-i
0532-k-diff-pairs-in-an-array
0539-minimum-time-difference
0540-single-element-in-a-sorted-array
0658-find-k-closest-elements
0797-rabbits-in-forest
0882-peak-index-in-a-mountain-array
0907-koko-eating-bananas
0926-find-and-replace-pattern
1018-largest-perimeter-triangle
1056-capacity-to-ship-packages-within-d-days
1111-minimum-score-triangulation-of-polygon
1335-maximum-candies-allocated-to-k-children
1605-minimum-number-of-days-to-make-m-bouquets
1886-minimum-limit-of-balls-in-a-bag
2137-final-value-of-variable-after-performing-operations
2188-minimized-maximum-of-products-distributed-to-any-store
2244-number-of-laser-beams-in-a-bank
2471-minimum-amount-of-time-to-collect-garbage
2478-longest-nice-subarray
2665-minimum-time-to-repair-cars
3251-maximum-area-of-longest-diagonal-rectangle
3639-zero-array-transformation-i

Matrix

0048-rotate-image
0073-set-matrix-zeroes
0074-search-a-2d-matrix
0407-trapping-rain-water-ii
2244-number-of-laser-beams-in-a-bank

Dynamic Programming

0005-longest-palindromic-substring
0053-maximum-subarray
0118-pascals-triangle
0120-triangle
0121-best-time-to-buy-and-sell-stock
0410-split-array-largest-sum
0647-palindromic-substrings
1086-divisor-game
1111-minimum-score-triangulation-of-polygon

Binary Search

0033-search-in-rotated-sorted-array
0034-find-first-and-last-position-of-element-in-sorted-array
0035-search-insert-position
0069-sqrtx
0074-search-a-2d-matrix
0153-find-minimum-in-rotated-sorted-array
0162-find-peak-element
0268-missing-number
0287-find-the-duplicate-number
0349-intersection-of-two-arrays
0410-split-array-largest-sum
0532-k-diff-pairs-in-an-array
0540-single-element-in-a-sorted-array
0658-find-k-closest-elements
0882-peak-index-in-a-mountain-array
0907-koko-eating-bananas
1056-capacity-to-ship-packages-within-d-days
1335-maximum-candies-allocated-to-k-children
1605-minimum-number-of-days-to-make-m-bouquets
1886-minimum-limit-of-balls-in-a-bag
2188-minimized-maximum-of-products-distributed-to-any-store
2665-minimum-time-to-repair-cars

Bit Manipulation

0029-divide-two-integers
0090-subsets-ii
0136-single-number
0268-missing-number
0287-find-the-duplicate-number
2478-longest-nice-subarray

Sorting

0015-3sum
0018-4sum
0049-group-anagrams
0056-merge-intervals
0075-sort-colors
0242-valid-anagram
0268-missing-number
0349-intersection-of-two-arrays
0455-assign-cookies
0532-k-diff-pairs-in-an-array
0539-minimum-time-difference
0658-find-k-closest-elements
0778-reorganize-string
0807-custom-sort-string
1018-largest-perimeter-triangle

Divide and Conquer

0053-maximum-subarray

Two Pointers

0005-longest-palindromic-substring
0015-3sum
0018-4sum
0028-find-the-index-of-the-first-occurrence-in-a-string
0075-sort-colors
0125-valid-palindrome
0189-rotate-array
0287-find-the-duplicate-number
0345-reverse-vowels-of-a-string
0349-intersection-of-two-arrays
0455-assign-cookies
0532-k-diff-pairs-in-an-array
0556-next-greater-element-iii
0647-palindromic-substrings
0658-find-k-closest-elements
0680-valid-palindrome-ii
0874-backspace-string-compare
0908-middle-of-the-linked-list
0953-reverse-only-letters
1894-merge-strings-alternately

Sliding Window

0658-find-k-closest-elements
2478-longest-nice-subarray

Heap (Priority Queue)

0407-trapping-rain-water-ii
0658-find-k-closest-elements
0778-reorganize-string

Brainteaser

1086-divisor-game

Game Theory

1086-divisor-game

Greedy

0410-split-array-largest-sum
0455-assign-cookies
0680-valid-palindrome-ii
0778-reorganize-string
0797-rabbits-in-forest
1018-largest-perimeter-triangle
2188-minimized-maximum-of-products-distributed-to-any-store

Prefix Sum

0410-split-array-largest-sum
2471-minimum-amount-of-time-to-collect-garbage
3639-zero-array-transformation-i

Stack

0496-next-greater-element-i
0874-backspace-string-compare
1078-remove-outermost-parentheses
1128-remove-all-adjacent-duplicates-in-string
1320-remove-all-adjacent-duplicates-in-string-ii
2021-remove-all-occurrences-of-a-substring

Simulation

0874-backspace-string-compare
1642-water-bottles
2021-remove-all-occurrences-of-a-substring
2137-final-value-of-variable-after-performing-operations
3336-water-bottles-ii

Enumeration

0204-count-primes

Number Theory

0204-count-primes
2610-closest-prime-numbers-in-range

Trie

0014-longest-common-prefix

Counting

0778-reorganize-string
1890-sum-of-beauty-of-all-substrings
3872-find-most-frequent-vowel-and-consonant

String Matching

0028-find-the-index-of-the-first-occurrence-in-a-string
0686-repeated-string-match

Recursion

0021-merge-two-sorted-lists
0050-powx-n

Union Find

0128-longest-consecutive-sequence

Linked List

0021-merge-two-sorted-lists
0237-delete-node-in-a-linked-list
0908-middle-of-the-linked-list

Backtracking

0090-subsets-ii

Monotonic Stack

0496-next-greater-element-i

Breadth-First Search

0407-trapping-rain-water-ii