LeetCode

LeetCode Topics

Array

0001-two-sum
0026-remove-duplicates-from-sorted-array
0027-remove-element
0034-find-first-and-last-position-of-element-in-sorted-array
0035-search-insert-position
0042-trapping-rain-water
0121-best-time-to-buy-and-sell-stock
0136-single-number
0189-rotate-array
0215-kth-largest-element-in-an-array
0268-missing-number
0283-move-zeroes
0436-find-right-interval
0690-employee-importance
0724-find-pivot-index
0739-daily-temperatures
0792-binary-search
0965-unique-email-addresses
1496-lucky-numbers-in-a-matrix
1615-range-sum-of-sorted-subarray-sums
1781-check-if-two-string-arrays-are-equivalent
2048-build-array-from-permutation
2102-find-the-middle-index-in-array
2502-sort-the-people
2727-number-of-senior-citizens
3476-find-minimum-operations-to-make-all-elements-divisible-by-three
3501-delete-nodes-from-linked-list-present-in-array

String

0014-longest-common-prefix
0020-valid-parentheses
0058-length-of-last-word
0920-uncommon-words-from-two-sentences
0965-unique-email-addresses
1274-number-of-days-between-two-dates
1666-make-the-string-great
1781-check-if-two-string-arrays-are-equivalent
2502-sort-the-people
2727-number-of-senior-citizens

Binary Search

0034-find-first-and-last-position-of-element-in-sorted-array
0035-search-insert-position
0268-missing-number
0374-guess-number-higher-or-lower
0436-find-right-interval
0441-arranging-coins
0792-binary-search
1615-range-sum-of-sorted-subarray-sums

Sorting

0215-kth-largest-element-in-an-array
0268-missing-number
0436-find-right-interval
1615-range-sum-of-sorted-subarray-sums
2502-sort-the-people

Two Pointers

0019-remove-nth-node-from-end-of-list
0026-remove-duplicates-from-sorted-array
0027-remove-element
0042-trapping-rain-water
0141-linked-list-cycle
0189-rotate-array
0283-move-zeroes
1615-range-sum-of-sorted-subarray-sums
2236-maximum-twin-sum-of-a-linked-list

Math

0189-rotate-array
0231-power-of-two
0268-missing-number
0441-arranging-coins
1274-number-of-days-between-two-dates
2556-convert-the-temperature
3476-find-minimum-operations-to-make-all-elements-divisible-by-three

Bit Manipulation

0136-single-number
0231-power-of-two
0268-missing-number

Recursion

0231-power-of-two
2573-remove-nodes-from-linked-list

Matrix

1496-lucky-numbers-in-a-matrix

Simulation

2048-build-array-from-permutation

Database

0180-consecutive-numbers
0197-rising-temperature
0570-managers-with-at-least-5-direct-reports
0577-employee-bonus
0584-find-customer-referee
0596-classes-more-than-5-students
0610-triangle-judgement
0619-biggest-single-number
0620-not-boring-movies
1135-customers-who-bought-all-products
1155-product-sales-analysis-iii
1161-project-employees-i
1182-game-play-analysis-iv
1258-article-views-i
1292-immediate-food-delivery-ii
1317-monthly-transactions-i
1338-queries-quality-and-percentage
1390-average-selling-price
1415-students-and-examinations
1670-patients-with-a-condition
1724-customer-who-visited-but-did-not-make-any-transactions
1773-percentage-of-users-attended-a-contest
1801-average-time-of-process-per-machine
1811-fix-names-in-a-table
1827-invalid-tweets
1877-find-followers-count
1882-the-number-of-employees-which-report-to-each-employee
1908-recyclable-and-low-fat-products
1942-primary-department-for-each-employee
2057-count-salary-categories
2087-confirmation-rate
2127-employees-whose-manager-left-the-company
2495-number-of-unique-subjects-taught-by-each-teacher

Hash Table

0001-two-sum
0141-linked-list-cycle
0268-missing-number
0690-employee-importance
0920-uncommon-words-from-two-sentences
0965-unique-email-addresses
2502-sort-the-people
3501-delete-nodes-from-linked-list-present-in-array

Linked List

0019-remove-nth-node-from-end-of-list
0141-linked-list-cycle
1765-merge-in-between-linked-lists
2236-maximum-twin-sum-of-a-linked-list
2573-remove-nodes-from-linked-list
3501-delete-nodes-from-linked-list-present-in-array

Stack

0020-valid-parentheses
0042-trapping-rain-water
0739-daily-temperatures
1666-make-the-string-great
2236-maximum-twin-sum-of-a-linked-list
2573-remove-nodes-from-linked-list

Monotonic Stack

0042-trapping-rain-water
0739-daily-temperatures
2573-remove-nodes-from-linked-list

Interactive

0374-guess-number-higher-or-lower

Counting

0920-uncommon-words-from-two-sentences

Dynamic Programming

0042-trapping-rain-water
0121-best-time-to-buy-and-sell-stock

Prefix Sum

0724-find-pivot-index
2102-find-the-middle-index-in-array

Trie

0014-longest-common-prefix

Divide and Conquer

0215-kth-largest-element-in-an-array

Heap (Priority Queue)

0215-kth-largest-element-in-an-array

Quickselect

0215-kth-largest-element-in-an-array

Tree

0690-employee-importance

Depth-First Search

0690-employee-importance

Breadth-First Search

0690-employee-importance