LeetCode

LeetCode platform problems solution

LeetCode Topics

Array

0001-two-sum
0014-longest-common-prefix
0026-remove-duplicates-from-sorted-array
0027-remove-element
0035-search-insert-position
0066-plus-one
0088-merge-sorted-array
0118-pascals-triangle
0136-single-number
0169-majority-element
0217-contains-duplicate
0268-missing-number
0287-find-the-duplicate-number
0414-third-maximum-number
0485-max-consecutive-ones
0682-baseball-game
0739-daily-temperatures
0792-binary-search
0830-largest-triangle-area
1421-find-numbers-with-even-number-of-digits
1505-create-target-array-in-the-given-order
1574-maximum-product-of-two-elements-in-an-array
2048-build-array-from-permutation
2137-final-value-of-variable-after-performing-operations
2324-find-triangular-sum-of-an-array
3476-find-minimum-operations-to-make-all-elements-divisible-by-three
3581-the-two-sneaky-numbers-of-digitville

Two Pointers

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
0088-merge-sorted-array
0125-valid-palindrome
0151-reverse-words-in-a-string
0160-intersection-of-two-linked-lists
0202-happy-number
0287-find-the-duplicate-number
0344-reverse-string
1894-merge-strings-alternately

Hash Table

0001-two-sum
0160-intersection-of-two-linked-lists
0169-majority-element
0202-happy-number
0217-contains-duplicate
0242-valid-anagram
0268-missing-number
3581-the-two-sneaky-numbers-of-digitville

String

0014-longest-common-prefix
0020-valid-parentheses
0028-find-the-index-of-the-first-occurrence-in-a-string
0058-length-of-last-word
0067-add-binary
0125-valid-palindrome
0151-reverse-words-in-a-string
0171-excel-sheet-column-number
0242-valid-anagram
0344-reverse-string
0412-fizz-buzz
0415-add-strings
1205-defanging-an-ip-address
1894-merge-strings-alternately
2137-final-value-of-variable-after-performing-operations

Trie

0014-longest-common-prefix

Stack

0020-valid-parentheses
0094-binary-tree-inorder-traversal
0225-implement-stack-using-queues
0682-baseball-game
0739-daily-temperatures

Linked List

0019-remove-nth-node-from-end-of-list
0021-merge-two-sorted-lists
0083-remove-duplicates-from-sorted-list
0160-intersection-of-two-linked-lists
1411-convert-binary-number-in-a-linked-list-to-integer

Recursion

0021-merge-two-sorted-lists
0050-powx-n
0231-power-of-two
0326-power-of-three
0342-power-of-four
1013-fibonacci-number

Math

0009-palindrome-number
0050-powx-n
0066-plus-one
0067-add-binary
0069-sqrtx
0070-climbing-stairs
0171-excel-sheet-column-number
0172-factorial-trailing-zeroes
0202-happy-number
0231-power-of-two
0258-add-digits
0263-ugly-number
0268-missing-number
0326-power-of-three
0342-power-of-four
0412-fizz-buzz
0415-add-strings
0441-arranging-coins
0507-perfect-number
0830-largest-triangle-area
1013-fibonacci-number
1236-n-th-tribonacci-number
1406-subtract-the-product-and-sum-of-digits-of-an-integer
1411-convert-binary-number-in-a-linked-list-to-integer
1421-find-numbers-with-even-number-of-digits
1444-number-of-steps-to-reduce-a-number-to-zero
1642-water-bottles
2324-find-triangular-sum-of-an-array
2383-add-two-integers
2491-smallest-even-multiple
2556-convert-the-temperature
3371-harshad-number
3476-find-minimum-operations-to-make-all-elements-divisible-by-three
3581-the-two-sneaky-numbers-of-digitville
3830-find-closest-person

Bit Manipulation

0067-add-binary
0136-single-number
0190-reverse-bits
0191-number-of-1-bits
0231-power-of-two
0268-missing-number
0287-find-the-duplicate-number
0342-power-of-four
1054-complement-of-base-10-integer
1444-number-of-steps-to-reduce-a-number-to-zero

Number Theory

0258-add-digits
2491-smallest-even-multiple

Simulation

0067-add-binary
0258-add-digits
0412-fizz-buzz
0415-add-strings
0682-baseball-game
1505-create-target-array-in-the-given-order
1642-water-bottles
2048-build-array-from-permutation
2137-final-value-of-variable-after-performing-operations
2324-find-triangular-sum-of-an-array

String Matching

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

Binary Search

0035-search-insert-position
0069-sqrtx
0268-missing-number
0287-find-the-duplicate-number
0374-guess-number-higher-or-lower
0441-arranging-coins
0792-binary-search

Dynamic Programming

0070-climbing-stairs
0118-pascals-triangle
0124-binary-tree-maximum-path-sum
1013-fibonacci-number
1236-n-th-tribonacci-number

Memoization

0070-climbing-stairs
1013-fibonacci-number
1236-n-th-tribonacci-number

Sorting

0088-merge-sorted-array
0169-majority-element
0217-contains-duplicate
0242-valid-anagram
0268-missing-number
0414-third-maximum-number
1574-maximum-product-of-two-elements-in-an-array

Tree

0094-binary-tree-inorder-traversal
0100-same-tree
0124-binary-tree-maximum-path-sum
0226-invert-binary-tree
0538-convert-bst-to-greater-tree
0783-search-in-a-binary-search-tree
2384-root-equals-sum-of-children

Depth-First Search

0094-binary-tree-inorder-traversal
0100-same-tree
0124-binary-tree-maximum-path-sum
0226-invert-binary-tree
0538-convert-bst-to-greater-tree

Binary Tree

0094-binary-tree-inorder-traversal
0100-same-tree
0124-binary-tree-maximum-path-sum
0226-invert-binary-tree
0538-convert-bst-to-greater-tree
0783-search-in-a-binary-search-tree
2384-root-equals-sum-of-children

Divide and Conquer

0169-majority-element
0190-reverse-bits
0191-number-of-1-bits

Counting

0169-majority-element

Design

0225-implement-stack-using-queues

Queue

0225-implement-stack-using-queues

Monotonic Stack

0739-daily-temperatures

Breadth-First Search

0100-same-tree
0226-invert-binary-tree

Binary Search Tree

0538-convert-bst-to-greater-tree
0783-search-in-a-binary-search-tree

Heap (Priority Queue)

1574-maximum-product-of-two-elements-in-an-array

Geometry

0830-largest-triangle-area

Interactive

0374-guess-number-higher-or-lower

Combinatorics

2324-find-triangular-sum-of-an-array