LeetCode_Sub

LeetCode Topics

Array

0001-two-sum
0004-median-of-two-sorted-arrays
0015-3sum
0018-4sum
0026-remove-duplicates-from-sorted-array
0027-remove-element
0031-next-permutation
0033-search-in-rotated-sorted-array
0034-find-first-and-last-position-of-element-in-sorted-array
0035-search-insert-position
0046-permutations
0048-rotate-image
0053-maximum-subarray
0054-spiral-matrix
0066-plus-one
0073-set-matrix-zeroes
0074-search-a-2d-matrix
0075-sort-colors
0081-search-in-rotated-sorted-array-ii
0088-merge-sorted-array
0118-pascals-triangle
0119-pascals-triangle-ii
0128-longest-consecutive-sequence
0136-single-number
0152-maximum-product-subarray
0153-find-minimum-in-rotated-sorted-array
0154-find-minimum-in-rotated-sorted-array-ii
0162-find-peak-element
0189-rotate-array
0217-contains-duplicate
0229-majority-element-ii
0268-missing-number
0287-find-the-duplicate-number
0410-split-array-largest-sum
0485-max-consecutive-ones
0493-reverse-pairs
0540-single-element-in-a-sorted-array
0560-subarray-sum-equals-k
0575-distribute-candies
0792-binary-search
0882-peak-index-in-a-mountain-array
0907-koko-eating-bananas
1408-find-the-smallest-divisor-given-a-threshold
1505-create-target-array-in-the-given-order
1528-kids-with-the-greatest-number-of-candies
1580-shuffle-the-array
1603-running-sum-of-1d-array
1605-minimum-number-of-days-to-make-m-bouquets
1635-number-of-good-pairs
1675-magnetic-force-between-two-balls
1677-matrix-diagonal-sum
1791-richest-customer-wealth
2047-find-a-peak-element-ii
2048-build-array-from-permutation
2058-concatenation-of-array
2210-find-target-indices-after-sorting-array
2219-maximum-number-of-words-found-in-sentences
2271-rearrange-array-elements-by-sign
2519-find-the-original-array-of-prefix-xor
2727-number-of-senior-citizens
2737-row-with-maximum-ones
2917-count-pairs-whose-sum-is-less-than-target
3194-find-words-containing-character
3221-find-the-peaks
3227-find-missing-and-repeated-values
3476-find-minimum-operations-to-make-all-elements-divisible-by-three

Two Pointers

0015-3sum
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
0031-next-permutation
0075-sort-colors
0088-merge-sorted-array
0189-rotate-array
0287-find-the-duplicate-number
0344-reverse-string
2271-rearrange-array-elements-by-sign
2917-count-pairs-whose-sum-is-less-than-target

Simulation

0054-spiral-matrix
1505-create-target-array-in-the-given-order
2048-build-array-from-permutation
2058-concatenation-of-array
2271-rearrange-array-elements-by-sign

Math

0007-reverse-integer
0009-palindrome-number
0013-roman-to-integer
0048-rotate-image
0050-powx-n
0066-plus-one
0069-sqrtx
0189-rotate-array
0231-power-of-two
0268-missing-number
1406-subtract-the-product-and-sum-of-digits-of-an-integer
1635-number-of-good-pairs
3227-find-missing-and-repeated-values
3476-find-minimum-operations-to-make-all-elements-divisible-by-three

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
0153-find-minimum-in-rotated-sorted-array
0154-find-minimum-in-rotated-sorted-array-ii
0162-find-peak-element
0268-missing-number
0278-first-bad-version
0287-find-the-duplicate-number
0410-split-array-largest-sum
0493-reverse-pairs
0540-single-element-in-a-sorted-array
0792-binary-search
0882-peak-index-in-a-mountain-array
0907-koko-eating-bananas
1408-find-the-smallest-divisor-given-a-threshold
1605-minimum-number-of-days-to-make-m-bouquets
1675-magnetic-force-between-two-balls
2047-find-a-peak-element-ii
2210-find-target-indices-after-sorting-array
2917-count-pairs-whose-sum-is-less-than-target

Divide and Conquer

0004-median-of-two-sorted-arrays
0053-maximum-subarray
0191-number-of-1-bits
0493-reverse-pairs

String

0013-roman-to-integer
0014-longest-common-prefix
0020-valid-parentheses
0028-find-the-index-of-the-first-occurrence-in-a-string
0058-length-of-last-word
0205-isomorphic-strings
0242-valid-anagram
0344-reverse-string
0812-rotate-string
2177-check-whether-two-strings-are-almost-equivalent
2219-maximum-number-of-words-found-in-sentences
2727-number-of-senior-citizens
3194-find-words-containing-character

Stack

0020-valid-parentheses

Sorting

0015-3sum
0018-4sum
0075-sort-colors
0088-merge-sorted-array
0217-contains-duplicate
0229-majority-element-ii
0242-valid-anagram
0268-missing-number
1675-magnetic-force-between-two-balls
2210-find-target-indices-after-sorting-array
2917-count-pairs-whose-sum-is-less-than-target

Dynamic Programming

0053-maximum-subarray
0118-pascals-triangle
0119-pascals-triangle-ii
0152-maximum-product-subarray
0410-split-array-largest-sum

Backtracking

0046-permutations

Hash Table

0001-two-sum
0013-roman-to-integer
0073-set-matrix-zeroes
0128-longest-consecutive-sequence
0205-isomorphic-strings
0217-contains-duplicate
0229-majority-element-ii
0242-valid-anagram
0268-missing-number
0560-subarray-sum-equals-k
0575-distribute-candies
1635-number-of-good-pairs
2177-check-whether-two-strings-are-almost-equivalent
3227-find-missing-and-repeated-values

Union Find

0128-longest-consecutive-sequence

Matrix

0048-rotate-image
0054-spiral-matrix
0073-set-matrix-zeroes
0074-search-a-2d-matrix
1677-matrix-diagonal-sum
1791-richest-customer-wealth
2047-find-a-peak-element-ii
2737-row-with-maximum-ones
3227-find-missing-and-repeated-values

String Matching

0028-find-the-index-of-the-first-occurrence-in-a-string
0812-rotate-string

Enumeration

3221-find-the-peaks

Bit Manipulation

0136-single-number
0191-number-of-1-bits
0231-power-of-two
0268-missing-number
0287-find-the-duplicate-number
1054-complement-of-base-10-integer
2519-find-the-original-array-of-prefix-xor

Interactive

0278-first-bad-version

Trie

0014-longest-common-prefix

Linked List

0019-remove-nth-node-from-end-of-list

Counting

0229-majority-element-ii
1635-number-of-good-pairs
2177-check-whether-two-strings-are-almost-equivalent

Binary Indexed Tree

0493-reverse-pairs

Segment Tree

0493-reverse-pairs

Merge Sort

0493-reverse-pairs

Ordered Set

0493-reverse-pairs

Prefix Sum

0410-split-array-largest-sum
0560-subarray-sum-equals-k
1603-running-sum-of-1d-array

Recursion

0050-powx-n
0231-power-of-two

Greedy

0410-split-array-largest-sum