LeetCode Topics

String

0003-longest-substring-without-repeating-characters
0072-edit-distance
0394-decode-string

Stack

0394-decode-string

Recursion

0394-decode-string

Array

0001-two-sum
0018-4sum
0031-next-permutation
0053-maximum-subarray
0073-set-matrix-zeroes
0074-search-a-2d-matrix
0075-sort-colors
0118-pascals-triangle
0121-best-time-to-buy-and-sell-stock
0128-longest-consecutive-sequence
0169-majority-element
0229-majority-element-ii
0287-find-the-duplicate-number
0560-subarray-sum-equals-k
1669-minimum-cost-to-cut-a-stick

Dynamic Programming

0053-maximum-subarray
0072-edit-distance
0118-pascals-triangle
0121-best-time-to-buy-and-sell-stock
1669-minimum-cost-to-cut-a-stick

Sorting

0018-4sum
0075-sort-colors
0169-majority-element
0229-majority-element-ii
1669-minimum-cost-to-cut-a-stick

Hash Table

0001-two-sum
0003-longest-substring-without-repeating-characters
0073-set-matrix-zeroes
0128-longest-consecutive-sequence
0169-majority-element
0229-majority-element-ii
0560-subarray-sum-equals-k

Prefix Sum

0560-subarray-sum-equals-k

Matrix

0073-set-matrix-zeroes
0074-search-a-2d-matrix

Two Pointers

0018-4sum
0031-next-permutation
0075-sort-colors
0287-find-the-duplicate-number

Divide and Conquer

0053-maximum-subarray
0169-majority-element

Binary Search

0074-search-a-2d-matrix
0287-find-the-duplicate-number

Bit Manipulation

0287-find-the-duplicate-number

Counting

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

Union Find

0128-longest-consecutive-sequence

Sliding Window

0003-longest-substring-without-repeating-characters