leetcode problems

LeetCode Topics

Math

0007-reverse-integer
0009-palindrome-number
0012-integer-to-roman
0048-rotate-image
0066-plus-one
0189-rotate-array
0258-add-digits
0268-missing-number
0412-fizz-buzz
1013-fibonacci-number

Dynamic Programming

0005-longest-palindromic-substring
0053-maximum-subarray
0121-best-time-to-buy-and-sell-stock
1013-fibonacci-number

Recursion

1013-fibonacci-number

Memoization

1013-fibonacci-number

String

0005-longest-palindromic-substring
0012-integer-to-roman
0014-longest-common-prefix
0017-letter-combinations-of-a-phone-number
0020-valid-parentheses
0028-find-the-index-of-the-first-occurrence-in-a-string
0058-length-of-last-word
0412-fizz-buzz
1566-check-if-a-word-occurs-as-a-prefix-of-any-word-in-a-sentence
2292-counting-words-with-a-given-prefix

Stack

0020-valid-parentheses

Array

0001-two-sum
0026-remove-duplicates-from-sorted-array
0027-remove-element
0031-next-permutation
0035-search-insert-position
0048-rotate-image
0053-maximum-subarray
0054-spiral-matrix
0066-plus-one
0073-set-matrix-zeroes
0121-best-time-to-buy-and-sell-stock
0128-longest-consecutive-sequence
0136-single-number
0169-majority-element
0189-rotate-array
0217-contains-duplicate
0268-missing-number
0283-move-zeroes
0448-find-all-numbers-disappeared-in-an-array
0485-max-consecutive-ones
0560-subarray-sum-equals-k
1137-height-checker
1468-check-if-n-and-its-double-exist
1878-check-if-array-is-sorted-and-rotated
2271-rearrange-array-elements-by-sign
2292-counting-words-with-a-given-prefix
2614-maximum-count-of-positive-integer-and-negative-integer

Matrix

0048-rotate-image
0054-spiral-matrix
0073-set-matrix-zeroes

Simulation

0054-spiral-matrix
0258-add-digits
0412-fizz-buzz
2271-rearrange-array-elements-by-sign

Two Pointers

0005-longest-palindromic-substring
0026-remove-duplicates-from-sorted-array
0027-remove-element
0028-find-the-index-of-the-first-occurrence-in-a-string
0031-next-permutation
0189-rotate-array
0283-move-zeroes
1468-check-if-n-and-its-double-exist
1566-check-if-a-word-occurs-as-a-prefix-of-any-word-in-a-sentence
2271-rearrange-array-elements-by-sign

Hash Table

0001-two-sum
0012-integer-to-roman
0017-letter-combinations-of-a-phone-number
0073-set-matrix-zeroes
0128-longest-consecutive-sequence
0169-majority-element
0217-contains-duplicate
0268-missing-number
0448-find-all-numbers-disappeared-in-an-array
0560-subarray-sum-equals-k
1468-check-if-n-and-its-double-exist

Number Theory

0258-add-digits

Binary Search

0035-search-insert-position
0268-missing-number
1468-check-if-n-and-its-double-exist
2614-maximum-count-of-positive-integer-and-negative-integer

Sorting

0169-majority-element
0217-contains-duplicate
0268-missing-number
1137-height-checker
1468-check-if-n-and-its-double-exist

String Matching

0028-find-the-index-of-the-first-occurrence-in-a-string
1566-check-if-a-word-occurs-as-a-prefix-of-any-word-in-a-sentence
2292-counting-words-with-a-given-prefix

Divide and Conquer

0053-maximum-subarray
0169-majority-element

Counting

0169-majority-element
2614-maximum-count-of-positive-integer-and-negative-integer

Trie

0014-longest-common-prefix

Bit Manipulation

0136-single-number
0268-missing-number

Counting Sort

1137-height-checker

Backtracking

0017-letter-combinations-of-a-phone-number

Prefix Sum

0560-subarray-sum-equals-k

Union Find

0128-longest-consecutive-sequence