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A collection of LeetCode questions to ace the coding interview! - Created using [LeetHub v2](https://github.com/arunbhardwaj/LeetHub-2.0)

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leetcode-solutions

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

LeetCode Topics

Math

0007-reverse-integer
0009-palindrome-number
0013-roman-to-integer
0029-divide-two-integers
0048-rotate-image
0050-powx-n
0060-permutation-sequence
0062-unique-paths
0066-plus-one
0067-add-binary
0069-sqrtx
0070-climbing-stairs
0231-power-of-two
0836-rectangle-overlap
1401-circle-and-rectangle-overlapping
1569-number-of-ways-to-reorder-array-to-get-same-bst
1621-number-of-sets-of-k-non-overlapping-line-segments
3524-find-x-value-of-array-i
3525-find-x-value-of-array-ii
3550-smallest-index-with-digit-sum-equal-to-index
3658-gcd-of-odd-and-even-sums
3723-maximize-sum-of-squares-of-digits
3870-count-commas-in-range
3871-count-commas-in-range-ii
3875-construct-uniform-parity-array-i
3876-construct-uniform-parity-array-ii
3886-sum-of-sortable-integers

Recursion

0010-regular-expression-matching
0021-merge-two-sorted-lists
0024-swap-nodes-in-pairs
0025-reverse-nodes-in-k-group
0044-wildcard-matching
0050-powx-n
0060-permutation-sequence
0231-power-of-two

Array

0001-two-sum
0004-median-of-two-sorted-arrays
0011-container-with-most-water
0014-longest-common-prefix
0015-3sum
0016-3sum-closest
0018-4sum
0026-remove-duplicates-from-sorted-array
0027-remove-element
0033-search-in-rotated-sorted-array
0034-find-first-and-last-position-of-element-in-sorted-array
0035-search-insert-position
0036-valid-sudoku
0037-sudoku-solver
0039-combination-sum
0040-combination-sum-ii
0041-first-missing-positive
0042-trapping-rain-water
0045-jump-game-ii
0046-permutations
0047-permutations-ii
0048-rotate-image
0049-group-anagrams
0051-n-queens
0053-maximum-subarray
0054-spiral-matrix
0055-jump-game
0056-merge-intervals
0057-insert-interval
0059-spiral-matrix-ii
0063-unique-paths-ii
0064-minimum-path-sum
0066-plus-one
0068-text-justification
0073-set-matrix-zeroes
0074-search-a-2d-matrix
0075-sort-colors
0078-subsets
0079-word-search
0080-remove-duplicates-from-sorted-array-ii
0081-search-in-rotated-sorted-array-ii
0084-largest-rectangle-in-histogram
0085-maximal-rectangle
0090-subsets-ii
0137-single-number-ii
0216-combination-sum-iii
0260-single-number-iii
0835-image-overlap
1477-find-two-non-overlapping-sub-arrays-each-with-target-sum
1569-number-of-ways-to-reorder-array-to-get-same-bst
1658-minimum-operations-to-reduce-x-to-zero
1807-evaluate-the-bracket-pairs-of-a-string
1926-nearest-exit-from-entrance-in-maze
2089-find-target-indices-after-sorting-array
2267-check-if-there-is-a-valid-parentheses-string-path
2333-minimum-sum-of-squared-difference
2778-sum-of-squares-of-special-elements
2897-apply-operations-on-array-to-maximize-sum-of-squares
2913-subarrays-distinct-element-sum-of-squares-i
2916-subarrays-distinct-element-sum-of-squares-ii
3414-maximum-score-of-non-overlapping-intervals
3524-find-x-value-of-array-i
3525-find-x-value-of-array-ii
3548-equal-sum-grid-partition-ii
3550-smallest-index-with-digit-sum-equal-to-index
3551-minimum-swaps-to-sort-by-digit-sum
3568-minimum-moves-to-clean-the-classroom
3644-maximum-k-to-sort-a-permutation
3727-maximum-alternating-sum-of-squares
3875-construct-uniform-parity-array-i
3876-construct-uniform-parity-array-ii
3886-sum-of-sortable-integers
3903-smallest-stable-index-i
3904-smallest-stable-index-ii
3942-minimum-operations-to-sort-a-permutation

Two Pointers

0005-longest-palindromic-substring
0011-container-with-most-water
0015-3sum
0016-3sum-closest
0018-4sum
0019-remove-nth-node-from-end-of-list
0026-remove-duplicates-from-sorted-array
0027-remove-element
0028-find-the-index-of-the-first-occurrence-in-a-string
0042-trapping-rain-water
0061-rotate-list
0075-sort-colors
0080-remove-duplicates-from-sorted-array-ii
0082-remove-duplicates-from-sorted-list-ii
0086-partition-list
0148-sort-list
2095-delete-the-middle-node-of-a-linked-list
2472-maximum-number-of-non-overlapping-palindrome-substrings

Number Theory

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

Linked List

0019-remove-nth-node-from-end-of-list
0021-merge-two-sorted-lists
0023-merge-k-sorted-lists
0024-swap-nodes-in-pairs
0025-reverse-nodes-in-k-group
0061-rotate-list
0082-remove-duplicates-from-sorted-list-ii
0083-remove-duplicates-from-sorted-list
0086-partition-list
0148-sort-list
0328-odd-even-linked-list
2058-find-the-minimum-and-maximum-number-of-nodes-between-critical-points
2095-delete-the-middle-node-of-a-linked-list

Hash Table

0001-two-sum
0003-longest-substring-without-repeating-characters
0013-roman-to-integer
0017-letter-combinations-of-a-phone-number
0030-substring-with-concatenation-of-all-words
0036-valid-sudoku
0037-sudoku-solver
0041-first-missing-positive
0049-group-anagrams
0073-set-matrix-zeroes
0076-minimum-window-substring
1096-brace-expansion-ii
1477-find-two-non-overlapping-sub-arrays-each-with-target-sum
1520-maximum-number-of-non-overlapping-substrings
1658-minimum-operations-to-reduce-x-to-zero
1807-evaluate-the-bracket-pairs-of-a-string
2897-apply-operations-on-array-to-maximize-sum-of-squares
2913-subarrays-distinct-element-sum-of-squares-i
2916-subarrays-distinct-element-sum-of-squares-ii
3548-equal-sum-grid-partition-ii
3551-minimum-swaps-to-sort-by-digit-sum
3568-minimum-moves-to-clean-the-classroom

Matrix

0036-valid-sudoku
0037-sudoku-solver
0048-rotate-image
0054-spiral-matrix
0059-spiral-matrix-ii
0063-unique-paths-ii
0064-minimum-path-sum
0073-set-matrix-zeroes
0074-search-a-2d-matrix
0079-word-search
0085-maximal-rectangle
0835-image-overlap
1926-nearest-exit-from-entrance-in-maze
2267-check-if-there-is-a-valid-parentheses-string-path
3548-equal-sum-grid-partition-ii
3568-minimum-moves-to-clean-the-classroom

Enumeration

2778-sum-of-squares-of-special-elements
3548-equal-sum-grid-partition-ii
3886-sum-of-sortable-integers

Prefix Sum

1621-number-of-sets-of-k-non-overlapping-line-segments
1658-minimum-operations-to-reduce-x-to-zero
3548-equal-sum-grid-partition-ii
3903-smallest-stable-index-i
3904-smallest-stable-index-ii

Divide and Conquer

0004-median-of-two-sorted-arrays
0023-merge-k-sorted-lists
0053-maximum-subarray
0148-sort-list
1569-number-of-ways-to-reorder-array-to-get-same-bst

Sorting

0015-3sum
0016-3sum-closest
0018-4sum
0047-permutations-ii
0049-group-anagrams
0056-merge-intervals
0075-sort-colors
0148-sort-list
1096-brace-expansion-ii
1520-maximum-number-of-non-overlapping-substrings
2089-find-target-indices-after-sorting-array
2333-minimum-sum-of-squared-difference
3414-maximum-score-of-non-overlapping-intervals
3551-minimum-swaps-to-sort-by-digit-sum
3727-maximum-alternating-sum-of-squares
3886-sum-of-sortable-integers

Merge Sort

0023-merge-k-sorted-lists
0148-sort-list

String

0003-longest-substring-without-repeating-characters
0005-longest-palindromic-substring
0006-zigzag-conversion
0010-regular-expression-matching
0013-roman-to-integer
0014-longest-common-prefix
0017-letter-combinations-of-a-phone-number
0020-valid-parentheses
0022-generate-parentheses
0028-find-the-index-of-the-first-occurrence-in-a-string
0030-substring-with-concatenation-of-all-words
0032-longest-valid-parentheses
0038-count-and-say
0044-wildcard-matching
0049-group-anagrams
0058-length-of-last-word
0065-valid-number
0067-add-binary
0068-text-justification
0071-simplify-path
0072-edit-distance
0076-minimum-window-substring
0079-word-search
0115-distinct-subsequences
0301-remove-invalid-parentheses
0678-valid-parenthesis-string
0856-score-of-parentheses
0940-distinct-subsequences-ii
1021-remove-outermost-parentheses
1096-brace-expansion-ii
1111-maximum-nesting-depth-of-two-valid-parentheses-strings
1190-reverse-substrings-between-each-pair-of-parentheses
1520-maximum-number-of-non-overlapping-substrings
1541-minimum-insertions-to-balance-a-parentheses-string
1614-maximum-nesting-depth-of-the-parentheses
1807-evaluate-the-bracket-pairs-of-a-string
2472-maximum-number-of-non-overlapping-palindrome-substrings
3498-reverse-degree-of-a-string
3863-minimum-operations-to-sort-a-string

Dynamic Programming

0005-longest-palindromic-substring
0010-regular-expression-matching
0022-generate-parentheses
0032-longest-valid-parentheses
0042-trapping-rain-water
0044-wildcard-matching
0045-jump-game-ii
0053-maximum-subarray
0055-jump-game
0062-unique-paths
0063-unique-paths-ii
0064-minimum-path-sum
0070-climbing-stairs
0072-edit-distance
0085-maximal-rectangle
0115-distinct-subsequences
0678-valid-parenthesis-string
0940-distinct-subsequences-ii
1477-find-two-non-overlapping-sub-arrays-each-with-target-sum
1569-number-of-ways-to-reorder-array-to-get-same-bst
1621-number-of-sets-of-k-non-overlapping-line-segments
2267-check-if-there-is-a-valid-parentheses-string-path
2472-maximum-number-of-non-overlapping-palindrome-substrings
3414-maximum-score-of-non-overlapping-intervals
3524-find-x-value-of-array-i

Backtracking

0017-letter-combinations-of-a-phone-number
0022-generate-parentheses
0037-sudoku-solver
0039-combination-sum
0040-combination-sum-ii
0046-permutations
0047-permutations-ii
0051-n-queens
0052-n-queens-ii
0077-combinations
0078-subsets
0079-word-search
0090-subsets-ii
0216-combination-sum-iii
0301-remove-invalid-parentheses
1096-brace-expansion-ii

Bracket Sequences

0020-valid-parentheses
0022-generate-parentheses
0032-longest-valid-parentheses
0678-valid-parenthesis-string
0856-score-of-parentheses
1021-remove-outermost-parentheses
1111-maximum-nesting-depth-of-two-valid-parentheses-strings
1190-reverse-substrings-between-each-pair-of-parentheses
1541-minimum-insertions-to-balance-a-parentheses-string
1614-maximum-nesting-depth-of-the-parentheses
2267-check-if-there-is-a-valid-parentheses-string-path

Bit Manipulation

0029-divide-two-integers
0067-add-binary
0078-subsets
0090-subsets-ii
0137-single-number-ii
0231-power-of-two
0260-single-number-iii
2220-minimum-bit-flips-to-convert-number
2897-apply-operations-on-array-to-maximize-sum-of-squares
3568-minimum-moves-to-clean-the-classroom
3644-maximum-k-to-sort-a-permutation

Breadth-First Search

0301-remove-invalid-parentheses
1096-brace-expansion-ii
1926-nearest-exit-from-entrance-in-maze
3568-minimum-moves-to-clean-the-classroom

Sliding Window

0003-longest-substring-without-repeating-characters
0030-substring-with-concatenation-of-all-words
0076-minimum-window-substring
1477-find-two-non-overlapping-sub-arrays-each-with-target-sum
1658-minimum-operations-to-reduce-x-to-zero

Binary Search

0004-median-of-two-sorted-arrays
0033-search-in-rotated-sorted-array
0034-find-first-and-last-position-of-element-in-sorted-array
0035-search-insert-position
0069-sqrtx
0074-search-a-2d-matrix
0081-search-in-rotated-sorted-array-ii
1477-find-two-non-overlapping-sub-arrays-each-with-target-sum
1658-minimum-operations-to-reduce-x-to-zero
2089-find-target-indices-after-sorting-array
2333-minimum-sum-of-squared-difference
3414-maximum-score-of-non-overlapping-intervals

Manacher

0005-longest-palindromic-substring

Greedy

0011-container-with-most-water
0044-wildcard-matching
0045-jump-game-ii
0055-jump-game
0678-valid-parenthesis-string
1520-maximum-number-of-non-overlapping-substrings
1541-minimum-insertions-to-balance-a-parentheses-string
2333-minimum-sum-of-squared-difference
2472-maximum-number-of-non-overlapping-palindrome-substrings
2897-apply-operations-on-array-to-maximize-sum-of-squares
3723-maximize-sum-of-squares-of-digits
3727-maximum-alternating-sum-of-squares

Trie

0014-longest-common-prefix

Stack

0020-valid-parentheses
0032-longest-valid-parentheses
0042-trapping-rain-water
0071-simplify-path
0084-largest-rectangle-in-histogram
0085-maximal-rectangle
0678-valid-parenthesis-string
0856-score-of-parentheses
1021-remove-outermost-parentheses
1096-brace-expansion-ii
1111-maximum-nesting-depth-of-two-valid-parentheses-strings
1190-reverse-substrings-between-each-pair-of-parentheses
1541-minimum-insertions-to-balance-a-parentheses-string
1614-maximum-nesting-depth-of-the-parentheses

Heap (Priority Queue)

0023-merge-k-sorted-lists
2333-minimum-sum-of-squared-difference

Tournament Sort

0023-merge-k-sorted-lists

String Matching

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

Z Algorithm

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

Knuth–Morris–Pratt Algorithm

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

Boyer–Moore String-Search Algorithm

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

Depth-First Search

0079-word-search
2265-count-nodes-equal-to-average-of-subtree

Algorithm X

0037-sudoku-solver
0051-n-queens
0052-n-queens-ii

Dancing Links

0037-sudoku-solver

Monotonic Stack

0042-trapping-rain-water
0084-largest-rectangle-in-histogram
0085-maximal-rectangle

Simulation

0054-spiral-matrix
0059-spiral-matrix-ii
0067-add-binary
0068-text-justification
3498-reverse-degree-of-a-string

Quicksort

0056-merge-intervals
0075-sort-colors

Combinatorics

0062-unique-paths
1569-number-of-ways-to-reorder-array-to-get-same-bst
1621-number-of-sets-of-k-non-overlapping-line-segments

Newton's Method

0069-sqrtx

Memoization

0070-climbing-stairs
1569-number-of-ways-to-reorder-array-to-get-same-bst

Bubble Sort

0075-sort-colors

Tree

1569-number-of-ways-to-reorder-array-to-get-same-bst
2265-count-nodes-equal-to-average-of-subtree

Binary Tree

1569-number-of-ways-to-reorder-array-to-get-same-bst
2265-count-nodes-equal-to-average-of-subtree

Range Minimum/Maximum Query

0084-largest-rectangle-in-histogram

Geometry

0836-rectangle-overlap
1401-circle-and-rectangle-overlapping

Segment Tree

2913-subarrays-distinct-element-sum-of-squares-i
2916-subarrays-distinct-element-sum-of-squares-ii
3525-find-x-value-of-array-ii

Binary Indexed Tree

2913-subarrays-distinct-element-sum-of-squares-i
2916-subarrays-distinct-element-sum-of-squares-ii

Union-Find

1569-number-of-ways-to-reorder-array-to-get-same-bst

Binary Search Tree

1569-number-of-ways-to-reorder-array-to-get-same-bst

Fermat's Little Theorem

1569-number-of-ways-to-reorder-array-to-get-same-bst

About

A collection of LeetCode questions to ace the coding interview! - Created using [LeetHub v2](https://github.com/arunbhardwaj/LeetHub-2.0)

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