Leetcode

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

LeetCode Topics

String

0006-zigzag-conversion
0008-string-to-integer-atoi
0012-integer-to-roman
0013-roman-to-integer
0020-valid-parentheses
0028-find-the-index-of-the-first-occurrence-in-a-string
0058-length-of-last-word
0067-add-binary
1700-minimum-time-to-make-rope-colorful

Math

0007-reverse-integer
0012-integer-to-roman
0013-roman-to-integer
0048-rotate-image
0050-powx-n
0066-plus-one
0067-add-binary
0069-sqrtx
0445-add-two-numbers-ii
1411-convert-binary-number-in-a-linked-list-to-integer
1863-sum-of-all-subset-xor-totals
1925-count-square-sum-triples
2288-count-operations-to-obtain-zero
3658-gcd-of-odd-and-even-sums
3676-smallest-number-with-all-set-bits

Bit Manipulation

0067-add-binary
0136-single-number
1863-sum-of-all-subset-xor-totals
3676-smallest-number-with-all-set-bits

Hash Table

0012-integer-to-roman
0013-roman-to-integer
0141-linked-list-cycle
0160-intersection-of-two-linked-lists
0816-design-hashset
3501-delete-nodes-from-linked-list-present-in-array
3610-find-x-sum-of-all-k-long-subarrays-i
3773-minimum-pair-removal-to-sort-array-i

Array

0011-container-with-most-water
0034-find-first-and-last-position-of-element-in-sorted-array
0035-search-insert-position
0039-combination-sum
0046-permutations
0048-rotate-image
0059-spiral-matrix-ii
0066-plus-one
0136-single-number
0215-kth-largest-element-in-an-array
0816-design-hashset
1700-minimum-time-to-make-rope-colorful
1863-sum-of-all-subset-xor-totals
2343-count-unguarded-cells-in-the-grid
3501-delete-nodes-from-linked-list-present-in-array
3610-find-x-sum-of-all-k-long-subarrays-i
3773-minimum-pair-removal-to-sort-array-i

Two Pointers

0011-container-with-most-water
0019-remove-nth-node-from-end-of-list
0028-find-the-index-of-the-first-occurrence-in-a-string
0061-rotate-list
0082-remove-duplicates-from-sorted-list-ii
0086-partition-list
0141-linked-list-cycle
0143-reorder-list
0160-intersection-of-two-linked-lists
0234-palindrome-linked-list
0908-middle-of-the-linked-list
2095-delete-the-middle-node-of-a-linked-list

Greedy

0011-container-with-most-water
1700-minimum-time-to-make-rope-colorful

Linked List

0019-remove-nth-node-from-end-of-list
0021-merge-two-sorted-lists
0024-swap-nodes-in-pairs
0061-rotate-list
0082-remove-duplicates-from-sorted-list-ii
0083-remove-duplicates-from-sorted-list
0086-partition-list
0092-reverse-linked-list-ii
0114-flatten-binary-tree-to-linked-list
0141-linked-list-cycle
0143-reorder-list
0160-intersection-of-two-linked-lists
0203-remove-linked-list-elements
0206-reverse-linked-list
0234-palindrome-linked-list
0237-delete-node-in-a-linked-list
0445-add-two-numbers-ii
0725-split-linked-list-in-parts
0816-design-hashset
0908-middle-of-the-linked-list
1411-convert-binary-number-in-a-linked-list-to-integer
1669-merge-in-between-linked-lists
2095-delete-the-middle-node-of-a-linked-list
2181-merge-nodes-in-between-zeros
3501-delete-nodes-from-linked-list-present-in-array
3773-minimum-pair-removal-to-sort-array-i

Matrix

0048-rotate-image
0059-spiral-matrix-ii
2343-count-unguarded-cells-in-the-grid

Simulation

0059-spiral-matrix-ii
0067-add-binary
2181-merge-nodes-in-between-zeros
2288-count-operations-to-obtain-zero
2343-count-unguarded-cells-in-the-grid
3773-minimum-pair-removal-to-sort-array-i

Dynamic Programming

1700-minimum-time-to-make-rope-colorful

Sliding Window

3610-find-x-sum-of-all-k-long-subarrays-i

Heap (Priority Queue)

0215-kth-largest-element-in-an-array
3610-find-x-sum-of-all-k-long-subarrays-i
3773-minimum-pair-removal-to-sort-array-i

Recursion

0021-merge-two-sorted-lists
0024-swap-nodes-in-pairs
0050-powx-n
0143-reorder-list
0203-remove-linked-list-elements
0206-reverse-linked-list
0234-palindrome-linked-list

Stack

0020-valid-parentheses
0114-flatten-binary-tree-to-linked-list
0143-reorder-list
0234-palindrome-linked-list
0445-add-two-numbers-ii

Design

0816-design-hashset

Hash Function

0816-design-hashset

Doubly-Linked List

3773-minimum-pair-removal-to-sort-array-i

Ordered Set

3773-minimum-pair-removal-to-sort-array-i

Tree

0100-same-tree
0114-flatten-binary-tree-to-linked-list

Depth-First Search

0100-same-tree
0114-flatten-binary-tree-to-linked-list

Binary Tree

0100-same-tree
0114-flatten-binary-tree-to-linked-list

Binary Search

0034-find-first-and-last-position-of-element-in-sorted-array
0035-search-insert-position
0069-sqrtx

Breadth-First Search

0100-same-tree

Enumeration

1863-sum-of-all-subset-xor-totals
1925-count-square-sum-triples

Backtracking

0039-combination-sum
0046-permutations
1863-sum-of-all-subset-xor-totals

Combinatorics

1863-sum-of-all-subset-xor-totals

Number Theory

3658-gcd-of-odd-and-even-sums

String Matching

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

Divide and Conquer

0215-kth-largest-element-in-an-array

Sorting

0215-kth-largest-element-in-an-array

Quickselect

0215-kth-largest-element-in-an-array