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interview-questions

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

Graph

1916-find-center-of-star-graph

LeetCode Topics

Array

0049-group-anagrams
0167-two-sum-ii-input-array-is-sorted
0169-majority-element
0219-contains-duplicate-ii
0303-range-sum-query-immutable
0347-top-k-frequent-elements
0816-design-hashset
0817-design-hashmap
1127-last-stone-weight
1333-sort-the-jumbled-numbers
1510-find-lucky-integer-in-an-array
1741-sort-array-by-increasing-frequency
2058-concatenation-of-array
2215-finding-3-digit-even-numbers

Hash Table

0049-group-anagrams
0169-majority-element
0219-contains-duplicate-ii
0347-top-k-frequent-elements
0389-find-the-difference
0451-sort-characters-by-frequency
0816-design-hashset
0817-design-hashmap
1510-find-lucky-integer-in-an-array
1741-sort-array-by-increasing-frequency
2215-finding-3-digit-even-numbers
3629-total-characters-in-string-after-transformations-i

Sorting

0049-group-anagrams
0169-majority-element
0347-top-k-frequent-elements
0389-find-the-difference
0451-sort-characters-by-frequency
1333-sort-the-jumbled-numbers
1741-sort-array-by-increasing-frequency
2215-finding-3-digit-even-numbers

String

0049-group-anagrams
0389-find-the-difference
0451-sort-characters-by-frequency
3540-hash-divided-string
3629-total-characters-in-string-after-transformations-i

Bit Manipulation

0389-find-the-difference

Enumeration

2215-finding-3-digit-even-numbers

Math

0002-add-two-numbers
0069-sqrtx
3629-total-characters-in-string-after-transformations-i

Dynamic Programming

1475-maximum-sum-bst-in-binary-tree
3629-total-characters-in-string-after-transformations-i

Counting

0169-majority-element
0347-top-k-frequent-elements
0451-sort-characters-by-frequency
1510-find-lucky-integer-in-an-array
3629-total-characters-in-string-after-transformations-i

Linked List

0002-add-two-numbers
0816-design-hashset
0817-design-hashmap
0908-middle-of-the-linked-list

Recursion

0002-add-two-numbers

Binary Search

0069-sqrtx
0167-two-sum-ii-input-array-is-sorted

Stack

0144-binary-tree-preorder-traversal
0145-binary-tree-postorder-traversal
0173-binary-search-tree-iterator

Tree

0103-binary-tree-zigzag-level-order-traversal
0110-balanced-binary-tree
0144-binary-tree-preorder-traversal
0145-binary-tree-postorder-traversal
0173-binary-search-tree-iterator
0450-delete-node-in-a-bst
0784-insert-into-a-binary-search-tree
1475-maximum-sum-bst-in-binary-tree

Depth-First Search

0110-balanced-binary-tree
0144-binary-tree-preorder-traversal
0145-binary-tree-postorder-traversal
1475-maximum-sum-bst-in-binary-tree

Binary Tree

0103-binary-tree-zigzag-level-order-traversal
0110-balanced-binary-tree
0144-binary-tree-preorder-traversal
0145-binary-tree-postorder-traversal
0173-binary-search-tree-iterator
0450-delete-node-in-a-bst
0784-insert-into-a-binary-search-tree
1475-maximum-sum-bst-in-binary-tree

Simulation

2058-concatenation-of-array
3540-hash-divided-string

Divide and Conquer

0169-majority-element
0347-top-k-frequent-elements

Design

0173-binary-search-tree-iterator
0303-range-sum-query-immutable
0816-design-hashset
0817-design-hashmap

Hash Function

0816-design-hashset
0817-design-hashmap

Prefix Sum

0303-range-sum-query-immutable

Two Pointers

0167-two-sum-ii-input-array-is-sorted
0908-middle-of-the-linked-list

Sliding Window

0219-contains-duplicate-ii

Heap (Priority Queue)

0347-top-k-frequent-elements
0451-sort-characters-by-frequency
1127-last-stone-weight

Bucket Sort

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

Quickselect

0347-top-k-frequent-elements

Binary Search Tree

0173-binary-search-tree-iterator
0450-delete-node-in-a-bst
0784-insert-into-a-binary-search-tree
1475-maximum-sum-bst-in-binary-tree

Iterator

0173-binary-search-tree-iterator

Breadth-First Search

0103-binary-tree-zigzag-level-order-traversal

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