LeetCodeSolutions

Solving LeetCode DSA problems

LeetCode Topics

Math

0007-reverse-integer
0009-palindrome-number
0013-roman-to-integer
0202-happy-number
0263-ugly-number
0264-ugly-number-ii
3227-find-missing-and-repeated-values

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
0037-sudoku-solver
0042-trapping-rain-water
0046-permutations
0153-find-minimum-in-rotated-sorted-array
0162-find-peak-element
0217-contains-duplicate
0560-subarray-sum-equals-k
0658-find-k-closest-elements
0792-binary-search
3227-find-missing-and-repeated-values

Two Pointers

0031-next-permutation
0042-trapping-rain-water
0202-happy-number
0658-find-k-closest-elements

Binary Search

0033-search-in-rotated-sorted-array
0034-find-first-and-last-position-of-element-in-sorted-array
0035-search-insert-position
0153-find-minimum-in-rotated-sorted-array
0162-find-peak-element
0658-find-k-closest-elements
0792-binary-search

Sliding Window

0658-find-k-closest-elements

Sorting

0217-contains-duplicate
0658-find-k-closest-elements

Heap (Priority Queue)

0264-ugly-number-ii
0658-find-k-closest-elements

Hash Table

0013-roman-to-integer
0037-sudoku-solver
0202-happy-number
0217-contains-duplicate
0264-ugly-number-ii
0560-subarray-sum-equals-k
3227-find-missing-and-repeated-values

String

0013-roman-to-integer

Dynamic Programming

0042-trapping-rain-water
0264-ugly-number-ii

Stack

0042-trapping-rain-water

Monotonic Stack

0042-trapping-rain-water

Matrix

0037-sudoku-solver
3227-find-missing-and-repeated-values

Backtracking

0037-sudoku-solver
0046-permutations

Prefix Sum

0560-subarray-sum-equals-k