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

LeetCode Topics

Tree

0098-validate-binary-search-tree
0235-lowest-common-ancestor-of-a-binary-search-tree
0236-lowest-common-ancestor-of-a-binary-tree
0783-search-in-a-binary-search-tree
0784-insert-into-a-binary-search-tree

Binary Search Tree

0098-validate-binary-search-tree
0235-lowest-common-ancestor-of-a-binary-search-tree
0783-search-in-a-binary-search-tree
0784-insert-into-a-binary-search-tree
1646-kth-missing-positive-number

Binary Tree

0098-validate-binary-search-tree
0235-lowest-common-ancestor-of-a-binary-search-tree
0236-lowest-common-ancestor-of-a-binary-tree
0783-search-in-a-binary-search-tree
0784-insert-into-a-binary-search-tree

Math

0048-rotate-image
0070-climbing-stairs
0189-rotate-array
0319-bulb-switcher
1013-fibonacci-number
1349-check-if-it-is-a-straight-line
1630-count-odd-numbers-in-an-interval-range
1642-water-bottles
1925-count-nice-pairs-in-an-array
2525-count-number-of-distinct-integers-after-reverse-operations
3336-water-bottles-ii

Dynamic Programming

0042-trapping-rain-water
0053-maximum-subarray
0070-climbing-stairs
0198-house-robber
0747-min-cost-climbing-stairs
1013-fibonacci-number

Memoization

0070-climbing-stairs
1013-fibonacci-number

Array

0001-two-sum
0026-remove-duplicates-from-sorted-array
0031-next-permutation
0042-trapping-rain-water
0048-rotate-image
0053-maximum-subarray
0054-spiral-matrix
0075-sort-colors
0088-merge-sorted-array
0169-majority-element
0189-rotate-array
0198-house-robber
0283-move-zeroes
0407-trapping-rain-water-ii
0724-find-pivot-index
0747-min-cost-climbing-stairs
0898-transpose-matrix
1319-unique-number-of-occurrences
1349-check-if-it-is-a-straight-line
1603-running-sum-of-1d-array
1646-kth-missing-positive-number
1878-check-if-array-is-sorted-and-rotated
1925-count-nice-pairs-in-an-array
2212-removing-minimum-and-maximum-from-array
2215-finding-3-digit-even-numbers
2525-count-number-of-distinct-integers-after-reverse-operations
2847-find-maximum-number-of-string-pairs
3242-count-elements-with-maximum-frequency

Hash Table

0001-two-sum
0169-majority-element
0242-valid-anagram
1319-unique-number-of-occurrences
1925-count-nice-pairs-in-an-array
2215-finding-3-digit-even-numbers
2525-count-number-of-distinct-integers-after-reverse-operations
2847-find-maximum-number-of-string-pairs
3242-count-elements-with-maximum-frequency

Counting

0169-majority-element
1925-count-nice-pairs-in-an-array
2525-count-number-of-distinct-integers-after-reverse-operations
3242-count-elements-with-maximum-frequency

String

0242-valid-anagram
1078-remove-outermost-parentheses
2847-find-maximum-number-of-string-pairs

Simulation

0054-spiral-matrix
0898-transpose-matrix
1642-water-bottles
2847-find-maximum-number-of-string-pairs
3336-water-bottles-ii

Divide and Conquer

0053-maximum-subarray
0169-majority-element

Sorting

0075-sort-colors
0088-merge-sorted-array
0169-majority-element
0242-valid-anagram
2215-finding-3-digit-even-numbers

Brainteaser

0319-bulb-switcher

Geometry

1349-check-if-it-is-a-straight-line

Depth-First Search

0098-validate-binary-search-tree
0235-lowest-common-ancestor-of-a-binary-search-tree
0236-lowest-common-ancestor-of-a-binary-tree

Recursion

1013-fibonacci-number

Enumeration

2215-finding-3-digit-even-numbers

Stack

0042-trapping-rain-water
1078-remove-outermost-parentheses

Prefix Sum

0724-find-pivot-index
1603-running-sum-of-1d-array

Breadth-First Search

0407-trapping-rain-water-ii

Heap (Priority Queue)

0407-trapping-rain-water-ii

Matrix

0048-rotate-image
0054-spiral-matrix
0407-trapping-rain-water-ii
0898-transpose-matrix

Two Pointers

0026-remove-duplicates-from-sorted-array
0031-next-permutation
0042-trapping-rain-water
0075-sort-colors
0088-merge-sorted-array
0189-rotate-array
0283-move-zeroes

Greedy

2212-removing-minimum-and-maximum-from-array

Monotonic Stack

0042-trapping-rain-water

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