Leetcode

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

LeetCode Topics

Array

0001-two-sum
0015-3sum
0027-remove-element
0034-find-first-and-last-position-of-element-in-sorted-array
0035-search-insert-position
0045-jump-game-ii
0048-rotate-image
0049-group-anagrams
0053-maximum-subarray
0055-jump-game
0073-set-matrix-zeroes
0074-search-a-2d-matrix
0075-sort-colors
0121-best-time-to-buy-and-sell-stock
0135-candy
0136-single-number
0169-majority-element
0179-largest-number
0189-rotate-array
0209-minimum-size-subarray-sum
0260-single-number-iii
0268-missing-number
0283-move-zeroes
0485-max-consecutive-ones
0792-binary-search
1001-n-repeated-element-in-size-2n-array
1293-three-consecutive-odds
1468-check-if-n-and-its-double-exist
1511-count-number-of-teams
1538-maximum-points-you-can-obtain-from-cards
1556-make-two-arrays-equal-by-reversing-subarrays
1646-kth-missing-positive-number
1849-maximum-absolute-sum-of-any-subarray
1878-check-if-array-is-sorted-and-rotated
1927-maximum-ascending-subarray-sum
2006-find-the-student-that-will-replace-the-chalk
2048-build-array-from-permutation
2163-kth-distinct-string-in-an-array
2231-find-first-palindromic-string-in-the-array
2271-rearrange-array-elements-by-sign
2308-divide-array-into-equal-pairs
2394-count-subarrays-with-score-less-than-k
2432-number-of-zero-filled-subarrays
2488-divide-intervals-into-minimum-number-of-groups
2552-maximum-sum-of-distinct-subarrays-with-length-k
3526-minimum-number-of-flips-to-make-binary-grid-palindromic-i
3788-maximum-unique-subarray-sum-after-deletion

Hash Table

0001-two-sum
0003-longest-substring-without-repeating-characters
0049-group-anagrams
0073-set-matrix-zeroes
0169-majority-element
0268-missing-number
0567-permutation-in-string
1001-n-repeated-element-in-size-2n-array
1468-check-if-n-and-its-double-exist
1556-make-two-arrays-equal-by-reversing-subarrays
2163-kth-distinct-string-in-an-array
2308-divide-array-into-equal-pairs
2552-maximum-sum-of-distinct-subarrays-with-length-k
3788-maximum-unique-subarray-sum-after-deletion

Dynamic Programming

0045-jump-game-ii
0053-maximum-subarray
0055-jump-game
0121-best-time-to-buy-and-sell-stock
0868-push-dominoes
1511-count-number-of-teams
1849-maximum-absolute-sum-of-any-subarray

Binary Indexed Tree

1511-count-number-of-teams

Math

0002-add-two-numbers
0007-reverse-integer
0009-palindrome-number
0048-rotate-image
0069-sqrtx
0189-rotate-array
0258-add-digits
0268-missing-number
1448-maximum-69-number
1889-check-if-number-is-a-sum-of-powers-of-three
2432-number-of-zero-filled-subarrays
2630-alternating-digit-sum
2649-count-total-number-of-colored-cells
3172-divisible-and-non-divisible-sums-difference

Greedy

0045-jump-game-ii
0055-jump-game
0135-candy
0179-largest-number
1448-maximum-69-number
2488-divide-intervals-into-minimum-number-of-groups
3788-maximum-unique-subarray-sum-after-deletion

Sorting

0015-3sum
0049-group-anagrams
0075-sort-colors
0169-majority-element
0179-largest-number
0268-missing-number
1468-check-if-n-and-its-double-exist
1556-make-two-arrays-equal-by-reversing-subarrays
2488-divide-intervals-into-minimum-number-of-groups

Binary Search

0034-find-first-and-last-position-of-element-in-sorted-array
0035-search-insert-position
0069-sqrtx
0074-search-a-2d-matrix
0209-minimum-size-subarray-sum
0268-missing-number
0792-binary-search
1468-check-if-n-and-its-double-exist
1646-kth-missing-positive-number
2006-find-the-student-that-will-replace-the-chalk
2394-count-subarrays-with-score-less-than-k

String

0003-longest-substring-without-repeating-characters
0020-valid-parentheses
0049-group-anagrams
0179-largest-number
0567-permutation-in-string
0868-push-dominoes
2163-kth-distinct-string-in-an-array
2231-find-first-palindromic-string-in-the-array
2800-minimum-string-length-after-removing-substrings
3447-clear-digits

Counting

0169-majority-element
2163-kth-distinct-string-in-an-array
2308-divide-array-into-equal-pairs

Matrix

0048-rotate-image
0073-set-matrix-zeroes
0074-search-a-2d-matrix
3526-minimum-number-of-flips-to-make-binary-grid-palindromic-i

Stack

0020-valid-parentheses
2800-minimum-string-length-after-removing-substrings
3447-clear-digits

Simulation

0258-add-digits
2006-find-the-student-that-will-replace-the-chalk
2048-build-array-from-permutation
2271-rearrange-array-elements-by-sign
2800-minimum-string-length-after-removing-substrings
3447-clear-digits

Two Pointers

0015-3sum
0027-remove-element
0075-sort-colors
0189-rotate-array
0283-move-zeroes
0567-permutation-in-string
0868-push-dominoes
1468-check-if-n-and-its-double-exist
2231-find-first-palindromic-string-in-the-array
2271-rearrange-array-elements-by-sign
2488-divide-intervals-into-minimum-number-of-groups
3526-minimum-number-of-flips-to-make-binary-grid-palindromic-i

Sliding Window

0003-longest-substring-without-repeating-characters
0209-minimum-size-subarray-sum
0567-permutation-in-string
1538-maximum-points-you-can-obtain-from-cards
2394-count-subarrays-with-score-less-than-k
2552-maximum-sum-of-distinct-subarrays-with-length-k

Linked List

0002-add-two-numbers

Recursion

0002-add-two-numbers

Bit Manipulation

0136-single-number
0260-single-number-iii
0268-missing-number
2308-divide-array-into-equal-pairs

Number Theory

0258-add-digits

Tree

0101-symmetric-tree
1544-count-good-nodes-in-binary-tree

Depth-First Search

0101-symmetric-tree
1544-count-good-nodes-in-binary-tree

Breadth-First Search

0101-symmetric-tree
1544-count-good-nodes-in-binary-tree

Binary Tree

0101-symmetric-tree
1544-count-good-nodes-in-binary-tree

Heap (Priority Queue)

2488-divide-intervals-into-minimum-number-of-groups

Prefix Sum

0209-minimum-size-subarray-sum
1538-maximum-points-you-can-obtain-from-cards
2006-find-the-student-that-will-replace-the-chalk
2394-count-subarrays-with-score-less-than-k
2488-divide-intervals-into-minimum-number-of-groups

Divide and Conquer

0053-maximum-subarray
0169-majority-element

Database

0181-employees-earning-more-than-their-managers