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Leetcode

Solutions from my leetcode journey
trying to solve one problem everyday

LeetCode Topics

Array

0001-two-sum
0026-remove-duplicates-from-sorted-array
0027-remove-element
0036-valid-sudoku
0041-first-missing-positive
0049-group-anagrams
0075-sort-colors
0121-best-time-to-buy-and-sell-stock
0122-best-time-to-buy-and-sell-stock-ii
0128-longest-consecutive-sequence
0167-two-sum-ii-input-array-is-sorted
0169-majority-element
0217-contains-duplicate
0238-product-of-array-except-self
0303-range-sum-query-immutable
0304-range-sum-query-2d-immutable
0347-top-k-frequent-elements
0560-subarray-sum-equals-k
0816-design-hashset
0948-sort-an-array
2058-concatenation-of-array

Hash Table

0001-two-sum
0036-valid-sudoku
0041-first-missing-positive
0049-group-anagrams
0128-longest-consecutive-sequence
0169-majority-element
0217-contains-duplicate
0242-valid-anagram
0347-top-k-frequent-elements
0560-subarray-sum-equals-k
0816-design-hashset

Simulation

2058-concatenation-of-array

Sorting

0049-group-anagrams
0075-sort-colors
0169-majority-element
0217-contains-duplicate
0242-valid-anagram
0347-top-k-frequent-elements
0948-sort-an-array

String

0014-longest-common-prefix
0049-group-anagrams
0125-valid-palindrome
0242-valid-anagram
0680-valid-palindrome-ii
1894-merge-strings-alternately

Trie

0014-longest-common-prefix

Two Pointers

0026-remove-duplicates-from-sorted-array
0027-remove-element
0075-sort-colors
0125-valid-palindrome
0167-two-sum-ii-input-array-is-sorted
0680-valid-palindrome-ii
1894-merge-strings-alternately

Divide and Conquer

0169-majority-element
0347-top-k-frequent-elements
0948-sort-an-array

Counting

0169-majority-element
0347-top-k-frequent-elements

Linked List

0816-design-hashset

Design

0303-range-sum-query-immutable
0304-range-sum-query-2d-immutable
0816-design-hashset

Hash Function

0816-design-hashset

Heap (Priority Queue)

0347-top-k-frequent-elements
0948-sort-an-array

Merge Sort

0948-sort-an-array

Bucket Sort

0347-top-k-frequent-elements
0948-sort-an-array

Radix Sort

0948-sort-an-array

Counting Sort

0948-sort-an-array

Quickselect

0347-top-k-frequent-elements

Prefix Sum

0238-product-of-array-except-self
0303-range-sum-query-immutable
0304-range-sum-query-2d-immutable
0560-subarray-sum-equals-k

Matrix

0036-valid-sudoku
0304-range-sum-query-2d-immutable

Union Find

0128-longest-consecutive-sequence

Binary Search

0167-two-sum-ii-input-array-is-sorted

Dynamic Programming

0121-best-time-to-buy-and-sell-stock
0122-best-time-to-buy-and-sell-stock-ii

Greedy

0122-best-time-to-buy-and-sell-stock-ii
0680-valid-palindrome-ii

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