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A collection of LeetCode questions to ace the coding interview!

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Leetcode-Solutions

A collection of LeetCode questions to ace the coding interview!

LeetCode Topics

Array

0001-two-sum
0004-median-of-two-sorted-arrays
0015-3sum
0026-remove-duplicates-from-sorted-array
0031-next-permutation
0033-search-in-rotated-sorted-array
0034-find-first-and-last-position-of-element-in-sorted-array
0035-search-insert-position
0039-combination-sum
0042-trapping-rain-water
0048-rotate-image
0051-n-queens
0054-spiral-matrix
0056-merge-intervals
0075-sort-colors
0081-search-in-rotated-sorted-array-ii
0088-merge-sorted-array
0118-pascals-triangle
0121-best-time-to-buy-and-sell-stock
0122-best-time-to-buy-and-sell-stock-ii
0136-single-number
0153-find-minimum-in-rotated-sorted-array
0162-find-peak-element
0169-majority-element
0189-rotate-array
0217-contains-duplicate
0229-majority-element-ii
0268-missing-number
0283-move-zeroes
0485-max-consecutive-ones
0540-single-element-in-a-sorted-array
0560-subarray-sum-equals-k
0735-asteroid-collision
0792-binary-search
0940-fruit-into-baskets
1046-max-consecutive-ones-iii
1482-how-many-numbers-are-smaller-than-the-current-number
1538-maximum-points-you-can-obtain-from-cards
1878-check-if-array-is-sorted-and-rotated
3251-maximum-area-of-longest-diagonal-rectangle

Hash Table

0001-two-sum
0003-longest-substring-without-repeating-characters
0017-letter-combinations-of-a-phone-number
0141-linked-list-cycle
0142-linked-list-cycle-ii
0160-intersection-of-two-linked-lists
0169-majority-element
0217-contains-duplicate
0229-majority-element-ii
0268-missing-number
0560-subarray-sum-equals-k
0940-fruit-into-baskets
1482-how-many-numbers-are-smaller-than-the-current-number

Two Pointers

0015-3sum
0019-remove-nth-node-from-end-of-list
0026-remove-duplicates-from-sorted-array
0031-next-permutation
0042-trapping-rain-water
0075-sort-colors
0088-merge-sorted-array
0141-linked-list-cycle
0142-linked-list-cycle-ii
0143-reorder-list
0160-intersection-of-two-linked-lists
0189-rotate-array
0283-move-zeroes
0908-middle-of-the-linked-list
2216-delete-the-middle-node-of-a-linked-list

Math

0002-add-two-numbers
0007-reverse-integer
0048-rotate-image
0189-rotate-array
0231-power-of-two
0268-missing-number
1448-maximum-69-number

Sorting

0015-3sum
0056-merge-intervals
0075-sort-colors
0088-merge-sorted-array
0169-majority-element
0217-contains-duplicate
0229-majority-element-ii
0268-missing-number
1482-how-many-numbers-are-smaller-than-the-current-number

Divide and Conquer

0004-median-of-two-sorted-arrays
0169-majority-element

Counting

0169-majority-element
0229-majority-element-ii

Matrix

0048-rotate-image
0054-spiral-matrix

Simulation

0054-spiral-matrix
0735-asteroid-collision

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
0081-search-in-rotated-sorted-array-ii
0153-find-minimum-in-rotated-sorted-array
0162-find-peak-element
0268-missing-number
0540-single-element-in-a-sorted-array
0792-binary-search
1046-max-consecutive-ones-iii

Bit Manipulation

0136-single-number
0231-power-of-two
0268-missing-number
2323-minimum-bit-flips-to-convert-number

Linked List

0002-add-two-numbers
0019-remove-nth-node-from-end-of-list
0021-merge-two-sorted-lists
0141-linked-list-cycle
0142-linked-list-cycle-ii
0143-reorder-list
0160-intersection-of-two-linked-lists
0203-remove-linked-list-elements
0206-reverse-linked-list
0237-delete-node-in-a-linked-list
0328-odd-even-linked-list
0908-middle-of-the-linked-list
2216-delete-the-middle-node-of-a-linked-list

Recursion

0002-add-two-numbers
0021-merge-two-sorted-lists
0143-reorder-list
0203-remove-linked-list-elements
0206-reverse-linked-list
0231-power-of-two

Dynamic Programming

0042-trapping-rain-water
0118-pascals-triangle
0121-best-time-to-buy-and-sell-stock
0122-best-time-to-buy-and-sell-stock-ii

Prefix Sum

0560-subarray-sum-equals-k
1046-max-consecutive-ones-iii
1538-maximum-points-you-can-obtain-from-cards

Greedy

0122-best-time-to-buy-and-sell-stock-ii
1448-maximum-69-number

Backtracking

0017-letter-combinations-of-a-phone-number
0039-combination-sum
0051-n-queens

String

0003-longest-substring-without-repeating-characters
0017-letter-combinations-of-a-phone-number
0020-valid-parentheses

Stack

0020-valid-parentheses
0042-trapping-rain-water
0143-reorder-list
0155-min-stack
0232-implement-queue-using-stacks
0735-asteroid-collision

Counting Sort

1482-how-many-numbers-are-smaller-than-the-current-number

Monotonic Stack

0042-trapping-rain-water

Design

0155-min-stack
0232-implement-queue-using-stacks

Queue

0232-implement-queue-using-stacks

Sliding Window

0003-longest-substring-without-repeating-characters
0940-fruit-into-baskets
1046-max-consecutive-ones-iii
1538-maximum-points-you-can-obtain-from-cards

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A collection of LeetCode questions to ace the coding interview!

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