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LeetCodeSoln

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

LeetCode Topics

Math

0002-add-two-numbers
0007-reverse-integer
0009-palindrome-number
0012-integer-to-roman
0048-rotate-image
0070-climbing-stairs
1013-fibonacci-number
2032-largest-odd-number-in-string

String

0012-integer-to-roman
0014-longest-common-prefix
0020-valid-parentheses
0022-generate-parentheses
0028-find-the-index-of-the-first-occurrence-in-a-string
0049-group-anagrams
0058-length-of-last-word
0205-isomorphic-strings
0242-valid-anagram
0451-sort-characters-by-frequency
0812-rotate-string
1537-maximum-score-after-splitting-a-string
1960-check-if-the-sentence-is-pangram
2032-largest-odd-number-in-string

Greedy

0045-jump-game-ii
0134-gas-station
0135-candy
2032-largest-odd-number-in-string

Stack

0020-valid-parentheses
0042-trapping-rain-water
0094-binary-tree-inorder-traversal
0144-binary-tree-preorder-traversal
0234-palindrome-linked-list
0496-next-greater-element-i
0503-next-greater-element-ii
0943-sum-of-subarray-minimums

Trie

0014-longest-common-prefix

Hash Table

0012-integer-to-roman
0049-group-anagrams
0142-linked-list-cycle-ii
0169-majority-element
0205-isomorphic-strings
0242-valid-anagram
0451-sort-characters-by-frequency
0496-next-greater-element-i
1556-make-two-arrays-equal-by-reversing-subarrays
1960-check-if-the-sentence-is-pangram

Array

0015-3sum
0016-3sum-closest
0027-remove-element
0031-next-permutation
0033-search-in-rotated-sorted-array
0039-combination-sum
0042-trapping-rain-water
0045-jump-game-ii
0048-rotate-image
0049-group-anagrams
0054-spiral-matrix
0078-subsets
0088-merge-sorted-array
0090-subsets-ii
0121-best-time-to-buy-and-sell-stock
0134-gas-station
0135-candy
0152-maximum-product-subarray
0167-two-sum-ii-input-array-is-sorted
0169-majority-element
0198-house-robber
0200-number-of-islands
0414-third-maximum-number
0496-next-greater-element-i
0503-next-greater-element-ii
0518-coin-change-ii
0733-flood-fill
0943-sum-of-subarray-minimums
1511-count-number-of-teams
1556-make-two-arrays-equal-by-reversing-subarrays
1878-check-if-array-is-sorted-and-rotated

Dynamic Programming

0022-generate-parentheses
0042-trapping-rain-water
0045-jump-game-ii
0070-climbing-stairs
0121-best-time-to-buy-and-sell-stock
0152-maximum-product-subarray
0198-house-robber
0518-coin-change-ii
0943-sum-of-subarray-minimums
1013-fibonacci-number
1511-count-number-of-teams

Binary Indexed Tree

1511-count-number-of-teams

Monotonic Stack

0042-trapping-rain-water
0496-next-greater-element-i
0503-next-greater-element-ii
0943-sum-of-subarray-minimums

Two Pointers

0015-3sum
0016-3sum-closest
0027-remove-element
0028-find-the-index-of-the-first-occurrence-in-a-string
0031-next-permutation
0042-trapping-rain-water
0088-merge-sorted-array
0142-linked-list-cycle-ii
0167-two-sum-ii-input-array-is-sorted
0234-palindrome-linked-list
0908-middle-of-the-linked-list

Binary Search

0033-search-in-rotated-sorted-array
0167-two-sum-ii-input-array-is-sorted

Sorting

0015-3sum
0016-3sum-closest
0049-group-anagrams
0088-merge-sorted-array
0169-majority-element
0242-valid-anagram
0414-third-maximum-number
0451-sort-characters-by-frequency
1556-make-two-arrays-equal-by-reversing-subarrays

String Matching

0028-find-the-index-of-the-first-occurrence-in-a-string
0812-rotate-string

Heap (Priority Queue)

0451-sort-characters-by-frequency

Bucket Sort

0451-sort-characters-by-frequency

Counting

0169-majority-element
0451-sort-characters-by-frequency

Tree

0094-binary-tree-inorder-traversal
0102-binary-tree-level-order-traversal
0104-maximum-depth-of-binary-tree
0110-balanced-binary-tree
0144-binary-tree-preorder-traversal
0226-invert-binary-tree

Breadth-First Search

0102-binary-tree-level-order-traversal
0104-maximum-depth-of-binary-tree
0200-number-of-islands
0226-invert-binary-tree
0733-flood-fill

Binary Tree

0094-binary-tree-inorder-traversal
0102-binary-tree-level-order-traversal
0104-maximum-depth-of-binary-tree
0110-balanced-binary-tree
0144-binary-tree-preorder-traversal
0226-invert-binary-tree

Depth-First Search

0094-binary-tree-inorder-traversal
0104-maximum-depth-of-binary-tree
0110-balanced-binary-tree
0144-binary-tree-preorder-traversal
0200-number-of-islands
0226-invert-binary-tree
0733-flood-fill

Divide and Conquer

0169-majority-element

Matrix

0048-rotate-image
0054-spiral-matrix
0200-number-of-islands
0733-flood-fill

Simulation

0054-spiral-matrix

Linked List

0002-add-two-numbers
0092-reverse-linked-list-ii
0142-linked-list-cycle-ii
0206-reverse-linked-list
0234-palindrome-linked-list
0328-odd-even-linked-list
0908-middle-of-the-linked-list

Recursion

0002-add-two-numbers
0206-reverse-linked-list
0234-palindrome-linked-list
1013-fibonacci-number

Memoization

0070-climbing-stairs
1013-fibonacci-number

Backtracking

0022-generate-parentheses
0039-combination-sum
0078-subsets
0090-subsets-ii

Bit Manipulation

0078-subsets
0090-subsets-ii

Prefix Sum

1537-maximum-score-after-splitting-a-string

Union Find

0200-number-of-islands

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