LeetCode

A collection of LeetCode solved questions

LeetCode Topics

Database

0175-combine-two-tables
0176-second-highest-salary
0177-nth-highest-salary
0178-rank-scores
0180-consecutive-numbers
0181-employees-earning-more-than-their-managers
0182-duplicate-emails
0183-customers-who-never-order
0184-department-highest-salary
0185-department-top-three-salaries
0196-delete-duplicate-emails
0197-rising-temperature
0570-managers-with-at-least-5-direct-reports
0577-employee-bonus
0585-investments-in-2016
0586-customer-placing-the-largest-number-of-orders
0595-big-countries
0596-classes-more-than-5-students
0602-friend-requests-ii-who-has-the-most-friends
0607-sales-person
0610-triangle-judgement
0619-biggest-single-number
0620-not-boring-movies
0626-exchange-seats
1135-customers-who-bought-all-products
1136-actors-and-directors-who-cooperated-at-least-three-times
1153-product-sales-analysis-i
1155-product-sales-analysis-iii
1161-project-employees-i
1179-game-play-analysis-i
1182-game-play-analysis-iv
1245-user-activity-for-the-past-30-days-i
1258-article-views-i
1278-product-price-at-a-given-date
1292-immediate-food-delivery-ii
1317-monthly-transactions-i
1327-last-person-to-fit-in-the-bus
1338-queries-quality-and-percentage
1390-average-selling-price
1415-students-and-examinations
1452-restaurant-growth
1462-list-the-products-ordered-in-a-period
1480-movie-rating
1509-replace-employee-id-with-the-unique-identifier
1625-group-sold-products-by-the-date
1664-find-users-with-valid-e-mails
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

Math

0009-palindrome-number
0013-roman-to-integer
0043-multiply-strings
0050-powx-n
0066-plus-one
0067-add-binary
1018-largest-perimeter-triangle
1119-robot-bounded-in-circle
1349-check-if-it-is-a-straight-line
1630-count-odd-numbers-in-an-interval-range
1950-sign-of-the-product-of-an-array
2491-smallest-even-multiple

Array

0001-two-sum
0066-plus-one
0283-move-zeroes
0682-baseball-game
0890-lemonade-change
0932-monotonic-array
1018-largest-perimeter-triangle
1349-check-if-it-is-a-straight-line
1400-find-winner-on-a-tic-tac-toe-game
1584-average-salary-excluding-the-minimum-and-maximum-salary
1626-can-make-arithmetic-progression-from-sequence
1677-matrix-diagonal-sum
1791-richest-customer-wealth
1950-sign-of-the-product-of-an-array

Hash Table

0001-two-sum
0013-roman-to-integer
0242-valid-anagram
0389-find-the-difference
1400-find-winner-on-a-tic-tac-toe-game

String

0013-roman-to-integer
0028-find-the-index-of-the-first-occurrence-in-a-string
0043-multiply-strings
0058-length-of-last-word
0067-add-binary
0242-valid-anagram
0389-find-the-difference
0459-repeated-substring-pattern
0657-robot-return-to-origin
0742-to-lower-case
1119-robot-bounded-in-circle
1894-merge-strings-alternately

Two Pointers

0028-find-the-index-of-the-first-occurrence-in-a-string
0283-move-zeroes
1894-merge-strings-alternately

Bit Manipulation

0067-add-binary
0389-find-the-difference

Sorting

0242-valid-anagram
0389-find-the-difference
1018-largest-perimeter-triangle
1584-average-salary-excluding-the-minimum-and-maximum-salary
1626-can-make-arithmetic-progression-from-sequence

String Matching

0028-find-the-index-of-the-first-occurrence-in-a-string
0459-repeated-substring-pattern

Number Theory

2491-smallest-even-multiple

Stack

0682-baseball-game

Simulation

0043-multiply-strings
0067-add-binary
0657-robot-return-to-origin
0682-baseball-game
1119-robot-bounded-in-circle
1400-find-winner-on-a-tic-tac-toe-game

Matrix

1400-find-winner-on-a-tic-tac-toe-game
1677-matrix-diagonal-sum
1791-richest-customer-wealth

Greedy

0890-lemonade-change
1018-largest-perimeter-triangle

Geometry

1349-check-if-it-is-a-straight-line

Recursion

0050-powx-n