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LeetCode

Repository having leetcode problem solutions

Linked List

0206-reverse-linked-list

Recursion

0206-reverse-linked-list

Array

0001-two-sum
0026-remove-duplicates-from-sorted-array
0053-maximum-subarray
0075-sort-colors
0169-majority-element
0982-minimum-increment-to-make-array-unique
1217-relative-sort-array
1878-check-if-array-is-sorted-and-rotated
2148-minimum-number-of-moves-to-seat-everyone

Hash Table

0001-two-sum
0013-roman-to-integer
0169-majority-element
0205-isomorphic-strings
0242-valid-anagram
0451-sort-characters-by-frequency
1217-relative-sort-array

Two Pointers

0026-remove-duplicates-from-sorted-array
0075-sort-colors
0151-reverse-words-in-a-string

Sorting

0075-sort-colors
0169-majority-element
0242-valid-anagram
0451-sort-characters-by-frequency
0982-minimum-increment-to-make-array-unique
1217-relative-sort-array
2148-minimum-number-of-moves-to-seat-everyone

Divide and Conquer

0053-maximum-subarray
0169-majority-element

Counting

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

Dynamic Programming

0053-maximum-subarray

String

0151-reverse-words-in-a-string
0812-rotate-string
2032-largest-odd-number-in-string

Math

0013-roman-to-integer
2032-largest-odd-number-in-string

Greedy

0982-minimum-increment-to-make-array-unique
2032-largest-odd-number-in-string
2148-minimum-number-of-moves-to-seat-everyone

String Matching

0013-roman-to-integer
0014-longest-common-prefix
0205-isomorphic-strings
0242-valid-anagram
0451-sort-characters-by-frequency
0812-rotate-string
3426-minimum-number-of-chairs-in-a-waiting-room

Trie

0014-longest-common-prefix

Heap (Priority Queue)

0451-sort-characters-by-frequency

Bucket Sort

0451-sort-characters-by-frequency

Simulation

3426-minimum-number-of-chairs-in-a-waiting-room

Tree

0094-binary-tree-inorder-traversal
0100-same-tree
0144-binary-tree-preorder-traversal
0145-binary-tree-postorder-traversal

Depth-First Search

0094-binary-tree-inorder-traversal
0100-same-tree
0144-binary-tree-preorder-traversal
0145-binary-tree-postorder-traversal

Breadth-First Search

0100-same-tree

Binary Tree

0094-binary-tree-inorder-traversal
0100-same-tree
0144-binary-tree-preorder-traversal
0145-binary-tree-postorder-traversal

Stack

0094-binary-tree-inorder-traversal
0144-binary-tree-preorder-traversal
0145-binary-tree-postorder-traversal

Counting Sort

0982-minimum-increment-to-make-array-unique
1217-relative-sort-array

LeetCode Topics

Array

0034-find-first-and-last-position-of-element-in-sorted-array
0055-jump-game
0189-rotate-array
0217-contains-duplicate
0219-contains-duplicate-ii
0283-move-zeroes
0350-intersection-of-two-arrays-ii
0455-assign-cookies
0882-peak-index-in-a-mountain-array
0890-lemonade-change
0941-sort-array-by-parity
0958-sort-array-by-parity-ii
1720-crawler-log-folder

Two Pointers

0189-rotate-array
0283-move-zeroes
0350-intersection-of-two-arrays-ii
0455-assign-cookies
0941-sort-array-by-parity
0958-sort-array-by-parity-ii

Greedy

0055-jump-game
0455-assign-cookies
0890-lemonade-change

Sorting

0217-contains-duplicate
0350-intersection-of-two-arrays-ii
0455-assign-cookies
0941-sort-array-by-parity
0958-sort-array-by-parity-ii

Dynamic Programming

0055-jump-game

Hash Table

0217-contains-duplicate
0219-contains-duplicate-ii
0350-intersection-of-two-arrays-ii

Binary Search

0034-find-first-and-last-position-of-element-in-sorted-array
0350-intersection-of-two-arrays-ii
0882-peak-index-in-a-mountain-array

String

1720-crawler-log-folder

Stack

1720-crawler-log-folder

Linked List

0002-add-two-numbers

Math

0002-add-two-numbers
0050-powx-n
0189-rotate-array

Recursion

0002-add-two-numbers
0050-powx-n

Tree

0543-diameter-of-binary-tree

Depth-First Search

0543-diameter-of-binary-tree

Binary Tree

0543-diameter-of-binary-tree

Sliding Window

0219-contains-duplicate-ii

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