Leetcode

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

LeetCode Topics

Array

0001-two-sum
0026-remove-duplicates-from-sorted-array
0049-group-anagrams
0128-longest-consecutive-sequence
0167-two-sum-ii-input-array-is-sorted
0209-minimum-size-subarray-sum
0217-contains-duplicate
0238-product-of-array-except-self
0268-missing-number
0347-top-k-frequent-elements
0485-max-consecutive-ones
0643-maximum-average-subarray-i
0713-subarray-product-less-than-k
1046-max-consecutive-ones-iii
1391-counting-elements
1445-number-of-sub-arrays-of-size-k-and-average-greater-than-or-equal-to-threshold
2331-intersection-of-multiple-arrays

Hash Table

0001-two-sum
0003-longest-substring-without-repeating-characters
0049-group-anagrams
0128-longest-consecutive-sequence
0217-contains-duplicate
0242-valid-anagram
0268-missing-number
0347-top-k-frequent-elements
1391-counting-elements
1960-check-if-the-sentence-is-pangram
2053-check-if-all-characters-have-equal-number-of-occurrences
2331-intersection-of-multiple-arrays
2427-first-letter-to-appear-twice

String

0003-longest-substring-without-repeating-characters
0049-group-anagrams
0125-valid-palindrome
0242-valid-anagram
1960-check-if-the-sentence-is-pangram
2053-check-if-all-characters-have-equal-number-of-occurrences
2427-first-letter-to-appear-twice

Bit Manipulation

0268-missing-number
2427-first-letter-to-appear-twice

Counting

0347-top-k-frequent-elements
2053-check-if-all-characters-have-equal-number-of-occurrences
2331-intersection-of-multiple-arrays
2427-first-letter-to-appear-twice

Math

0268-missing-number

Binary Search

0167-two-sum-ii-input-array-is-sorted
0209-minimum-size-subarray-sum
0268-missing-number
0713-subarray-product-less-than-k
1046-max-consecutive-ones-iii

Sorting

0049-group-anagrams
0217-contains-duplicate
0242-valid-anagram
0268-missing-number
0347-top-k-frequent-elements
2331-intersection-of-multiple-arrays

Divide and Conquer

0347-top-k-frequent-elements

Heap (Priority Queue)

0347-top-k-frequent-elements

Bucket Sort

0347-top-k-frequent-elements

Quickselect

0347-top-k-frequent-elements

Prefix Sum

0209-minimum-size-subarray-sum
0238-product-of-array-except-self
0713-subarray-product-less-than-k
1046-max-consecutive-ones-iii

Union Find

0128-longest-consecutive-sequence

Two Pointers

0026-remove-duplicates-from-sorted-array
0125-valid-palindrome
0167-two-sum-ii-input-array-is-sorted

Sliding Window

0003-longest-substring-without-repeating-characters
0209-minimum-size-subarray-sum
0643-maximum-average-subarray-i
0713-subarray-product-less-than-k
1046-max-consecutive-ones-iii
1445-number-of-sub-arrays-of-size-k-and-average-greater-than-or-equal-to-threshold