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Leetcode 763: Partition Labels

Leetcode 2780: Minimum Index of a Valids Split

Leetcode 3169: Count Days Without Meetings

The k-th Lexicographical String of All Happy Strings of Length n

Product of the Last K Numbers

Leetcode 2516: Take K of Each Character From Left and Right

Leetcode 2275: Largest Combination With Bitwise AND Greater Than Zero

Leetcode 1106: Parsing A Boolean Expression

Leetcode 962: Maximum Width Ramp

Leetcode 921: Minimum Add To Make Parentheses Valid

Leetcode 1963: Minimum Number of Swaps to Make the String Balanced

Leetcode 2696: Minimum String Length After Removing Substrings

Leetcode 3011: Find if Array Can Be Sorted

Games

Puzzles

Information

Templates

Solutions

Advent Of Code

Codeforces

1A

2A

CSS Battle

Leetcode

2-add-two-numbers

3-longest-substring-without-repeating-characters

4-median-of-two-sorted-arrays

5-longest-palindromic-substring

6-zigzag-conversion

7-reverse-integer

8-string-to-integer-atoi

9-palindrome-number

10-regular-expression-matching

11-container-with-most-water

12-integer-to-roman

13-roman-to-integer

14-longest-common-prefix

17-letter-combinations-of-a-phone-number

19-remove-nth-node-from-end-of-list

20-valid-parentheses

21-merge-two-sorted-lists

22-generate-parentheses

23-merge-k-sorted-lists

24-swap-nodes-in-pairs

26-remove-duplicates-from-sorted-array

27-remove-element

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

29-divide-two-integers

31-next-permutation

32-longest-valid-parentheses

33-search-in-rotated-sorted-array

34-find-first-and-last-position-of-element-in-sorted-array

35-search-insert-position

36-valid-sudoku

38-count-and-say

39-combination-sum

40-combination-sum-ii

41-first-missing-positive

42-trapping-rain-water

43-multiply-strings

45-jump-game-ii

46-permutations

47-permutations-ii

49-group-anagrams

53-maximum-subarray

54-spiral-matrix

56-merge-intervals

57-insert-interval

58-length-of-last-word

59-spiral-matrix-ii

62-unique-paths

63-unique-paths-ii

64-minimum-path-sum

65-valid-number

70-climbing-stairs

74-search-a-2d-matrix

76-minimum-window-substring

77-combinations

80-remove-duplicates-from-sorted-array-ii

81-search-in-rotated-sorted-array-ii

83-remove-duplicates-from-sorted-list

85-maximal-rectangle

86-partition-list

88-merge-sorted-array

92-reverse-linked-list-ii

93-restore-ip-addresses

94-binary-tree-inorder-traversal

96-unique-binary-search-trees

101-symmetric-tree

104-maximum-depth-of-binary-tree

108-convert-sorted-array-to-binary-search-tree

109-convert-sorted-list-to-binary-search-tree

110-balanced-binary-tree

111-minimum-depth-of-binary-tree

118-pascals-triangle

119-pascals-triangle-ii

121-best-time-to-buy-and-sell-stock

124-binary-tree-maximum-path-sum

125-valid-palindrome

129-sum-root-to-leaf-numbers

134-gas-station

136-single-number

137-single-number-ii

138-copy-list-with-random-pointer

140-word-break-ii

141-linked-list-cycle

143-reorder-list

144-binary-tree-preorder-traversal

145-binary-tree-postorder-traversal

151-reverse-words-in-a-string

160-intersection-of-two-linked-lists

165-compare-version-numbers

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

168-excel-sheet-column-title

169-majority-element

171-excel-sheet-column-number

175-combine-two-tables

179-largest-number

181-employees-earning-more-than-their-managers

182-combine-two-tables

183-customers-who-never-order

187-repeated-dna-sequences

189-rotate-array

190-reverse-bits

191-number-of-1-bits

193-valid-phone-numbers

194-transpose-file

196-delete-duplicate-emails

197-rising-temperature

198-house-robber

200-number-of-islands

201-bitwise-and-of-numbers-range

202-happy-number

203-remove-linked-list-elements

205-isomorphic-strings

206-reverse-linked-list

207-course-schedule

210-course-schedule-ii

212-word-search-ii

213-house-robber-ii

214-shortest-palindrome

217-contains-duplicate

219-contains-duplicate-ii

222-count-complete-tree-nodes

225-implement-stack-using-queues

226-invert-binary-tree

228-summary-ranges

229-majority-element-ii

231-power-of-two

232-implement-queue-using-stacks

233-number-of-digit-one

234-palindrome-linked-list

237-delete-node-in-a-linked-list

238-product-of-array-except-self

239-sliding-window-maximum

242-valid-anagram

257-binary-tree-paths

260-single-number-iii

263-ugly-number

264-ugly-number-ii

268-missing-number

273-integer-to-english-words

278-first-bad-version

279-perfect-squares

283-move-zeroes

287-find-the-duplicate-number

290-word-pattern

299-bulls-and-cows

300-longest-increasing-subsequence

303-range-sum-query-immutable

310-minimum-height-trees

322-coin-change

326-power-of-three

330-patching-array

337-house-robber-iii

338-counting-bits

341-flatten-nested-list-iterator

342-power-of-four

344-reverse-string

345-reverse-vowels-of-a-string

347-top-k-frequent-elements

349-intersection-of-two-arrays

350-intersection-of-two-arrays-ii

355-design-twitter

367-valid-perfect-square

371-sum-of-two-integers

373-find-k-pairs-with-smallest-sums

374-guess-number-higher-or-lower

377-combination-sum-iv

380-insert-delete-getrandom-o1

383-ransom-note

386-lexicographical-numbers

387-first-unique-character-in-a-string

389-find-the-difference

392-is-subsequence

401-binary-watch

402-remove-k-digits

404-sum-of-left-leaves

405-convert-a-number-to-hexadecimal

407-trapping-rain-water-ii

409-longest-palindrome

414-third-maximum-number

415-add-strings

419-battleships-in-a-board

434-number-of-segments-in-a-string

435-non-overlapping-intervals

440-k-th-smallest-in-lexicographical-order

441-arranging-coins

442-find-all-duplicates-in-an-array

448-find-all-numbers-disappeared-in-an-array

451-sort-characters-by-frequency

452-minimum-number-of-arrows-to-burst-balloons

455-assign-cookies

459-repeated-substring-pattern

461-hamming-distance

463-island-perimeter

470-implement-rand10-using-rand7

482-license-key-formatting

485-max-consecutive-ones

492-construct-the-rectangle

495-teemo-attacking

496-next-greater-element-i

498-diagonal-traverse

500-keyboard-row

501-find-mode-in-binary-search-tree

506-relative-ranks

507-perfect-number

509-fibonacci-number

511-game-play-analysis-i

513-find-bottom-left-tree-value

515-find-largest-value-in-each-tree-row

520-detect-capital

521-longest-uncommon-subsequence-i

523-continuous-subarray-sum

525-contiguous-array

530-minimum-absolute-difference-in-bst

535-encode-and-decode-tinyurl

539-minimum-time-difference

541-reverse-string-ii

543-diameter-of-binary-tree

547-number-of-provinces

551-student-attendance-record-i

552-student-attendance-record-ii

557-reverse-words-in-a-string-iii

559-maximum-depth-of-n-ary-tree

560-subarray-sum-equals-k

561-array-partition

563-binary-tree-tilt

564-find-the-closest-palindrome

566-reshape-the-matrix

567-permutation-in-string

572-subtree-of-another-tree

575-distribute-candies

577-employee-bonus

584-find-customer-referee

586-customer-placing-the-largest-number-of-orders

589-n-ary-tree-preorder-traversal

590-n-ary-tree-postorder-traversal

592-fraction-addition-and-subtraction

594-longest-harmonious-subsequence

595-big-countries

596-classes-more-than-5-students

598-range-addition-ii

599-minimum-index-sum-of-two-lists

605-can-place-flowers

606-construct-string-from-binary-tree

607-sales-person

610-triangle-judgement

617-merge-two-binary-trees

619-biggest-single-number

620-not-boring-movies

621-task-scheduler

623-add-one-row-to-tree

627-swap-salary

628-maximum-product-of-three-numbers

632-smallest-range-covering-elements-from-k-lists

633-sum-of-square-numbers

637-average-of-levels-in-binary-tree

641-design-circular-deque

643-maximum-average-subarray-i

648-replace-words

650-2-keys-keyboard

653-two-sum-iv-input-is-a-bst

657-robot-return-to-origin

661-image-smoother

664-strange-printer

670-maximum-swap

671-second-minimum-node-in-a-binary-tree

673-number-of-longest-increasing-subsequence

674-longest-continuous-increasing-subsequence

678-valid-parenthesis-string

680-valid-palindrome-ii

682-baseball-game

684-redundant-connection

693-binary-number-with-alternating-bits

696-count-binary-substrings

700-search-in-a-binary-search-tree

701-insert-into-a-binary-search-tree

703-kth-largest-element-in-a-stream

704-binary-search

705-design-hashset

706-design-hashmap

709-to-lower-case

713-subarray-product-less-than-k

714-best-time-to-buy-and-sell-stock-with-transaction-fee

717-1-bit-and-2-bit-characters

719-find-k-th-smallest-pair-distance

724-find-pivot-index

725-split-linked-list-in-parts

726-number-of-atoms

728-self-dividing-numbers

729-my-calendar-i

739-daily-temperatures

740-delete-and-earn

744-find-smallest-letter-greater-than-target

746-min-cost-climbing-stairs

747-largest-number-at-least-twice-of-others

748-shortest-completing-word

762-prime-number-of-set-bits-in-binary-representation

763-partition-labels

766-toeplitz-matrix

771-jewels-and-stones

779-k-th-symbol-in-grammar

781-rabbits-in-forest

783-minimum-distance-between-bst-nodes

785-is-graph-bipartite

791-custom-sort-string

796-rotate-string

799-champagne-tower

802-find-eventual-safe-states

804-unique-morse-code-words

806-number-of-lines-to-write-string

808-soup-servings

812-largest-triangle-area

819-most-common-word

821-shortest-distance-to-a-character

826-most-profit-assigning-work

832-flipping-an-image

834-sum-of-distances-in-tree

837-new-21-game

840-magic-squares-in-grid

846-hand-of-straights

859-buddy-strings

860-lemonade-change

862-shortest-subarray-with-sum-at-least-k

873-length-of-longest-fibonacci-subsequence

874-walking-robot-simulation

875-koko-eating-bananas

876-middle-of-the-linked-list

880-decoded-string-at-index

881-boats-to-save-people

883-projection-area-of-3d-shapes

884-uncommon-words-from-two-sentences

885-spiral-matrix-iii

888-fair-candy-swap

892-surface-area-of-3d-shapes

894-all-possible-full-binary-trees

896-monotonic-array

905-sort-array-by-parity

908-smallest-range-i

912-sort-an-array

914-x-of-a-kind-in-a-deck-of-cards

916-word-subsets

921-minimum-add-to-make-parentheses-valid

929-unique-email-addresses

930-binary-subarrays-with-sum

931-minimum-falling-path-sum

933-number-of-recent-calls

935-knight-dialer

938-range-sum-of-bst

942-di-string-match

945-minimum-increment-to-make-array-unique

947-most-stones-removed-with-same-row-or-column

948-bag-of-tokens

950-reveal-cards-in-increasing-order

951-flip-equivalent-binary-trees

962-maximum-width-ramp

974-subarray-sums-divisible-by-k

976-largest-perimeter-triangle

977-squares-of-a-sorted-array

979-distribute-coins-in-binary-tree

988-smallest-string-starting-from-leaf

992-subarrays-with-k-different-integers

995-minimum-number-of-k-consecutive-bit-flips

997-find-the-town-judge

1002-find-common-characters

1004-max-consecutive-ones-iii

1009-complement-of-base-10-integer

1010-pairs-of-songs-with-total-durations-divisible-by-60

1014-best-sightseeing-pair

1025-divisor-game

1026-maximum-difference-between-node-and-ancestor

1027-longest-arithmetic-subsequence

1028-recover-a-tree-from-preorder-traversal

1030-matrix-cells-in-distance-order

1043-partition-array-for-maximum-sum

1046-last-stone-weight

1051-height-checker

1052-grumpy-bookstore-owner

1054-distant-barcodes

1068-product-sales-analysis-i

1071-greatest-common-divisor-of-strings

1072-flip-columns-for-maximum-number-of-equal-rows

1079-letter-tile-possibilities

1089-duplicate-zeros

1105-filling-bookcase-shelves

1106-parsing-a-boolean-expression

1108-defanging-an-ip-address

1114-print-in-order

1115-print-foobar-alternately

1122-relative-sort-array

1137-n-th-tribonacci-number

1140-stone-game-ii

1143-longest-common-subsequence

1148-article-views-i

1171-remove-zero-sum-consecutive-nodes-from-linked-list

1187-make-array-strictly-increasing

1189-maximum-number-of-balloons

1201-ugly-number-iii

1207-unique-number-of-occurrences

1208-get-equal-substrings-within-budget

1221-split-a-string-in-balanced-strings

1232-check-if-it-is-a-straight-line

1233-remove-sub-folders-from-the-filesystem

1248-count-number-of-nice-subarrays

1249-minimum-remove-to-make-valid-parentheses

1255-maximum-score-words-formed-by-letters

1261-find-elements-in-a-contaminated-binary-tree

1266-minimum-time-visiting-all-points

1277-count-square-submatrices-with-all-ones

1280-students-and-examinations

1289-minimum-falling-path-sum-ii

1290-convert-binary-number-in-a-linked-list-to-integer

1310-xor-queries-of-a-subarray

1318-minimum-flips-to-make-a-or-b-equal-to-c

1323-maximum-69-number

1331-rank-transform-of-an-array

1334-find-the-city-with-the-smallest-number-of-neighbors-at-a-threshold-distance

1337-the-k-weakest-rows-in-a-matrix

1342-number-of-steps-to-reduce-a-number-to-zero

1346-check-if-n-and-its-double-exist

1351-count-negative-numbers-in-a-sorted-matrix

1352-product-of-the-last-k-numbers

1354-construct-target-array-with-multiple-sums

1356-sort-integers-by-the-number-of-1-bits

1358-number-of-substrings-containing-all-three-characters

1359-count-all-valid-pickup-and-delivery-options

1365-how-many-numbers-are-smaller-than-the-current-number

1367-linked-list-in-binary-tree

1371-find-the-longest-substring-containing-vowels-in-even-counts

1374-generate-a-string-with-characters-that-have-odd-counts

1376-time-needed-to-inform-all-employees

1377-frog-position-after-t-seconds

1378-replace-employee-id-with-the-unique-identifier

1380-lucky-numbers-in-a-matrix

1381-design-a-stack-with-increment-operation

1382-balance-a-binary-search-tree

1395-count-number-of-teams

1400-construct-k-palindrome-strings

1404-number-of-steps-to-reduce-a-number-in-binary-representation-to-one

1405-longest-happy-string

1408-string-matching-in-an-array

1411-number-of-ways-to-paint-n-3-grid

1415-the-k-th-lexicographical-string-of-all-happy-strings-of-length-n

1431-kids-with-the-greatest-number-of-candies

1436-destination-city

1438-longest-continuous-subarray-with-absolute-diff-less-than-or-equal-to-limit

1442-count-triplets-that-can-form-two-arrays-of-equal-xor

1455-check-if-a-word-occurs-as-a-prefix-of-any-word-in-a-sentence

1456-maximum-number-of-vowels-in-a-substring-of-given-length

1460-make-two-arrays-equal-by-reversing-subarrays

1462-course-schedule-iv

1464-maximum-product-of-two-elements-in-an-array

1470-shuffle-the-array

1475-final-prices-with-a-special-discount-in-a-shop

1476-subrectangle-queries

1480-running-sum-of-1d-array

1481-least-number-of-unique-integers-after-k-removals

1486-xor-operation-in-an-array

1492-the-kth-factor-of-n

1497-check-if-array-pairs-are-divisible-by-k

1502-can-make-arithmetic-progression-from-sequence

1503-last-moment-before-all-ants-fall-out-of-a-plank

1508-range-sum-of-sorted-subarray-sums

1509-minimum-difference-between-largest-and-smallest-value-in-three-moves

1512-number-of-good-pairs

1513-number-of-substrings-with-only-1s

1514-path-with-maximum-probability

1518-water-bottles

1524-number-of-sub-arrays-with-odd-sum

1535-find-the-winner-of-an-array-game

1542-find-longest-awesome-substring

1544-make-the-string-great

1545-find-kth-bit-in-nth-binary-string

1550-three-consecutive-odds

1552-magnetic-force-between-two-balls

1557-minimum-number-of-vertices-to-reach-all-nodes

1561-maximum-number-of-coins-you-can-get

1568-minimum-number-of-days-to-disconnect-island

1572-matrix-diagonal-sum

1574-shortest-subarray-to-be-removed-to-make-array-sorted

1588-sum-of-all-odd-length-subarrays

1590-make-sum-divisible-by-p

1593-split-a-string-into-the-max-number-of-unique-substrings

1598-crawler-log-folder

1603-design-parking-system

1605-find-valid-matrix-given-row-and-column-sums

1608-special-array-with-x-elements-greater-than-or-equal-x

1609-even-odd-tree

1614-maximum-nesting-depth-of-the-parentheses

1630-arithmetic-subarrays

1636-sort-array-by-increasing-frequency

1637-widest-vertical-area-between-two-points-containing-no-points

1646-get-maximum-in-generated-array

1652-defuse-the-bomb

1653-minimum-deletions-to-make-string-balanced

1656-design-an-ordered-stream

1657-determine-if-two-strings-are-close

1658-minimum-operations-to-reduce-x-to-zero

1662-check-if-two-string-arrays-are-equivalent

1669-merge-in-between-linked-lists

1672-count-servers-that-communicate

1672-richest-customer-wealth

1678-goal-parser-interpretation

1683-invalid-tweets

1698-partitioning-into-minimum-number-of-deci-binary-numbers

1700-number-of-students-unable-to-eat-lunch

1701-average-waiting-time

1704-determine-if-string-halves-are-alike

1710-maximum-units-on-a-truck

1716-calculate-money-in-leetcode-bank

1717-maximum-score-from-removing-substrings

1718-construct-the-lexicographically-largest-valid-sequence

1721-swapping-nodes-in-a-linked-list

1732-find-the-highest-altitude

1748-sum-of-unique-elements

1749-maximum-absolute-sum-of-any-subarray

1750-minimum-length-of-string-after-deleting-similar-ends

1752-check-if-array-is-sorted-and-rotated

1757-recyclable-and-low-fat-products

1763-longest-nice-substring

1765-map-of-highest-peak

1768-merge-strings-alternately

1769-minimum-number-of-operations-to-move-all-balls-to-each-box

1773-count-items-matching-a-rule

1780-check-if-number-is-a-sum-of-powers-of-three

1790-check-if-one-string-swap-can-make-strings-equal

1791-find-center-of-star-graph

1796-second-largest-digit-in-a-string

1800-maximum-ascending-subarray-sum

1813-sentence-similarity-iii

1823-find-the-winner-of-the-circular-game

1827-minimum-operations-to-make-the-array-increasing

1845-seat-reservation-manager

1854-maximum-population-year

1859-sorting-the-sentence

1863-sum-of-all-subset-xor-totals

1870-minimum-speed-to-arrive-on-time

1894-find-the-student-that-will-replace-the-chalk

1903-largest-odd-number-in-string

1909-remove-one-element-to-make-the-array-strictly-increasing

1910-remove-all-occurrences-of-a-substring

1915-number-of-wonderful-substrings

1920-build-array-from-permutation

1925-count-square-sum-triples

1929-concatenation-of-array

1930-unique-length-3-palindromic-subsequences

1931-painting-a-grid-with-three-different-colors

1937-maximum-number-of-points-with-cost

1942-the-number-of-the-smallest-unoccupied-chair

1945-sum-of-digits-of-string-after-convert

1957-delete-characters-to-make-fancy-string

1963-minimum-number-of-swaps-to-make-the-string-balanced

1971-find-if-path-exists-in-graph

1974-minimum-time-to-type-word-using-special-typewriter

1975-maximum-matrix-sum

1976-number-of-ways-to-arrive-at-destination

1980-find-unique-binary-string

1986-minimum-number-of-work-sessions-to-finish-the-tasks

1991-find-the-middle-index-in-array

1992-find-all-groups-of-farmland

2000-reverse-prefix-of-word

2011-final-value-of-variable-after-performing-operations

2022-convert-1d-array-into-2d-array

2027-minimum-moves-to-convert-string

2028-find-missing-observations

2033-minimum-operations-to-make-a-uni-value-grid

2037-minimum-number-of-moves-to-seat-everyone

2044-count-number-of-maximum-bitwise-or-subsets

2053-kth-distinct-string-in-an-array

2058-find-the-minimum-and-maximum-number-of-nodes-between-critical-points

2064-minimized-maximum-of-products-distributed-to-any-store

2070-most-beautiful-item-for-each-query

2073-time-needed-to-buy-tickets

2096-step-by-step-directions-from-a-binary-tree-node-to-another

2101-detonate-the-maximum-bombs

2108-find-first-palindromic-string-in-the-array

2114-maximum-number-of-words-found-in-sentences

2116-check-if-a-parentheses-string-can-be-valid

2124-check-if-all-as-appears-before-all-bs

2129-capitalize-the-title

2130-maximum-twin-sum-of-a-linked-list

2133-check-if-every-row-and-column-contains-all-numbers

2134-minimum-swaps-to-group-all-1s-together-ii

2141-maximum-running-time-of-n-computers

2144-minimum-cost-of-buying-candies-with-discount

2149-rearrange-array-elements-by-sign

2150-find-all-lonely-numbers-in-the-array

2160-minimum-sum-of-four-digit-number-after-splitting-digits

2161-partition-array-according-to-given-pivot

2162-minimum-cost-to-set-cooking-time

2181-merge-nodes-in-between-zeros

2185-counting-words-with-a-given-prefix

2192-all-ancestors-of-a-node-in-a-directed-acyclic-graph

2196-create-binary-tree-from-descriptions

2206-divide-array-into-equal-pairs

2220-minimum-bit-flips-to-convert-number

2225-find-players-with-zero-or-one-losses

2226-maximum-candies-allocated-to-k-children

2235-add-two-integers

2236-root-equals-sum-of-children

2257-count-unguarded-cells-in-the-grid

2259-remove-digit-from-number-to-maximize-result

2265-count-nodes-equal-to-average-of-subtree

2269-find-the-k-beauty-of-a-number

2270-number-of-ways-to-split-array

2275-largest-combination-with-bitwise-and-greater-than-zero

2285-maximum-total-importance-of-roads

2290-minimum-obstacle-removal-to-reach-corner

2325-decode-the-message

2326-spiral-matrix-iv

2335-minimum-amount-of-time-to-fill-cups

2342-max-sum-of-a-pair-with-equal-sum-of-digits

2349-design-a-number-container-system

2356-number-of-unique-subjects-taught-by-each-teacher

2364-count-number-of-bad-pairs

2370-longest-ideal-subsequence

2373-largest-local-values-in-a-matrix

2375-construct-smallest-number-from-di-string

2379-minimum-recolors-to-get-k-consecutive-black-blocks

2381-shifting-letters-ii

2385-amount-of-time-for-binary-tree-to-be-infected

2396-strictly-palindromic-number

2399-check-distances-between-same-letters

2401-longest-nice-subarray

2410-maximum-matching-of-players-with-trainers

2416-sum-of-prefix-scores-of-strings

2418-sort-the-people

2419-longest-subarray-with-maximum-bitwise-and

2425-bitwise-xor-of-all-pairings

2429-minimize-xor

2433-find-the-original-array-of-prefix-xor

2441-largest-positive-integer-that-exists-with-its-negative

2444-count-subarrays-with-fixed-bounds

2446-determine-if-two-events-have-conflict

2447-number-of-subarrays-with-gcd-equal-to-k

2458-height-of-binary-tree-after-subtree-removal-queries

2460-apply-operations-to-an-array

2469-convert-the-temperature

2481-minimum-cuts-to-divide-a-circle

2485-find-the-pivot-integer

2486-append-characters-to-string-to-make-subsequence

2487-remove-nodes-from-linked-list

2490-circular-sentence

2500-delete-greatest-value-in-each-row

2503-maximum-number-of-points-from-grid-queries

2516-take-k-of-each-character-from-left-and-right

2520-count-the-digits-that-divide-a-number

2523-closest-prime-numbers-in-range

2529-maximum-count-of-positive-integer-and-negative-integer

2530-maximal-score-after-applying-k-operations

2540-minimum-common-value

2558-take-gifts-from-the-richest-pile

2559-count-vowel-strings-in-ranges

2560-house-robber-iv

2562-find-the-array-concatenation-value

2563-count-the-number-of-fair-pairs

2570-merge-two-2d-arrays-by-summing-values

2574-left-and-right-sum-differences

2579-count-total-number-of-colored-cells

2582-pass-the-pillow

2583-kth-largest-sum-in-a-binary-tree

2586-count-the-number-of-vowel-strings-in-range

2591-distribute-money-to-maximum-children

2594-minimum-time-to-repair-cars

2597-the-number-of-beautiful-subsets

2600-k-items-with-the-maximum-sum

2605-form-smallest-number-from-two-digit-arrays

2618-check-if-object-instance-of-class

2619-array-prototype-last

2622-cache-with-time-limit

2626-array-reduce-transformation

2628-json-deep-equal

2629-function-composition

2634-filter-elements-from-array

2635-apply-transform-over-each-element-in-array

2637-promise-time-limit

2641-cousins-in-binary-tree-ii

2643-row-with-maximum-ones

2648-generate-fibonacci-sequence

2652-sum-multiples

2656-maximum-sum-with-exactly-k-elements

2657-find-the-prefix-common-array-of-two-arrays

2658-maximum-number-of-fish-in-a-grid

2661-first-completely-painted-row-or-column

2665-counter-ii

2666-allow-one-function-call

2667-create-hello-world-function

2678-number-of-senior-citizens

2683-neighboring-bitwise-xor

2685-count-the-number-of-complete-components

2695-array-wrapper

2696-minimum-string-length-after-removing-substrings

2697-lexicographically-smallest-palindrome

2698-find-the-punishment-number-of-an-integer

2703-return-length-of-arguments-passed

2704-to-be-or-not-to-be

2707-extra-characters-in-a-string

2715-timeout-cancellation

2718-sum-of-matrix-after-queries

2769-find-the-maximum-achievable-number

2780-minimum-index-of-a-valid-split

2798-number-of-employees-who-met-the-target

2810-faulty-keyboard

2816-double-a-number-represented-as-a-linked-list

2824-count-pairs-whose-sum-is-less-than-target

2825-make-string-a-subsequence-using-cyclic-increments

2843-count-symmetric-integers

2848-points-that-intersect-with-cars

2864-maximum-odd-binary-number

2877-create-a-dataframe-from-list

2878-get-the-size-of-a-dataframe

2879-display-the-first-three-rows

2880-select-data

2881-create-a-new-column

2882-drop-duplicate-rows

2914-minimum-number-of-changes-to-make-binary-string-beautiful

2923-find-champion-i

2924-find-champion-ii

2928-distribute-candies-among-children-i

2938-separate-black-and-white-balls

2941-divide-players-into-teams-of-equal-skill

2942-find-words-containing-character

2948-make-lexicographically-smallest-array-by-swapping-elements

2958-length-of-longest-subarray-with-at-most-k-frequency

2962-count-subarrays-where-max-element-appears-at-least-k-times

2965-find-missing-and-repeated-values

2971-find-polygon-with-the-largest-perimeter

2974-minimum-number-game

2997-minimum-number-of-operations-to-make-array-xor-equal-to-k

3005-count-elements-with-maximum-frequency

3011-find-if-array-can-be-sorted

3014-minimum-number-of-pushes-to-type-word-i

3016-minimum-number-of-pushes-to-type-word-ii

3028-ant-on-the-boundary

3034-number-of-subarrays-that-match-a-pattern-i

3042-count-prefix-and-suffix-pairs-i

3043-find-the-length-of-the-longest-common-prefix

3046-split-the-array

3066-minimum-operations-to-exceed-threshold-value-ii

3074-apple-redistribution-into-boxes

3092-most-frequent-ids

3105-longest-strictly-increasing-or-strictly-decreasing-subarray

3106-lexicographically-smallest-string-after-operations-with-constraint

3107-minimum-operations-to-make-median-of-array-equal-to-k

3110-score-of-a-string

3115-maximum-prime-difference

3116-kth-smallest-amount-with-single-denomination-combination

3120-count-the-number-of-special-characters-i

3121-count-the-number-of-special-characters-ii

3122-minimum-number-of-operations-to-satisfy-conditions

3132-find-the-integer-added-to-array-ii

3133-minimum-array-end

3138-minimum-length-of-anagram-concatenation

3146-permutation-difference-between-two-strings

3151-special-array-i

3152-special-array-ii

3153-sum-of-digit-differences-of-all-pairs

3161-find-the-number-of-distinct-colors-among-the-balls

3163-string-compression-iii

3168-minimum-number-of-chairs-in-a-waiting-room

3169-count-days-without-meetings

3174-clear-digits

3178-find-the-child-who-has-the-ball-after-k-seconds

3179-find-the-n-th-value-after-k-seconds

3180-maximum-total-reward-using-operations-i

3181-design-a-stack-with-increment-operation

3184-count-pairs-that-form-a-complete-day-i

3185-count-pairs-that-form-a-complete-day-ii

3190-find-minimum-operations-to-make-all-elements-divisible-by-three

3191-minimum-operations-to-make-binary-array-elements-equal-to-one-i

3192-minimum-operations-to-make-binary-array-elements-equal-to-one-ii

3194-minimum-average-of-smallest-and-largest-elements

3200-maximum-height-of-a-triangle

3206-alternating-groups-i

3208-alternating-groups-ii

3210-find-the-encrypted-string

3211-generate-binary-strings-without-adjacent-zeros

3216-lexicographically-smallest-string-after-a-swap

3217-delete-nodes-from-linked-list-present-in-array

3222-find-the-winning-player-in-coin-game

3223-minimum-length-of-string-after-operations

3224-minimum-array-changes-to-make-differences-equal

3226-number-of-bit-changes-to-make-two-integers-equal

3232-find-if-digit-game-can-be-won

3233-find-the-count-of-numbers-which-are-not-special

3234-count-the-number-of-substrings-with-dominant-ones

3238-find-the-number-of-winning-players

3239-minimum-number-of-flips-to-make-binary-grid-palindromic-i

3242-design-neighbor-sum-service

3243-shortest-distance-after-road-addition-queries-i

3248-snake-in-matrix

3249-count-the-number-of-good-nodes

3250-find-the-count-of-monotonic-pairs-i

3254-find-the-power-of-k-size-subarrays-i

3270-find-the-key-of-the-numbers

3271-hash-divided-string

3274-check-if-two-chessboard-squares-have-the-same-color

3280-convert-date-to-binary

3285-find-indices-of-stable-mountains

3289-the-two-sneaky-numbers-of-digitville

3295-report-spam-message

3300-minimum-element-after-replacement-with-digit-sum

3304-find-the-k-th-character-in-string-game-i

3306-count-of-substrings-containing-every-vowel-and-k-consonants-ii

3309-maximum-possible-number-by-binary-concatenation

3318-find-x-sum-of-all-k-long-subarrays-i

3324-find-the-sequence-of-strings-appeared-on-the-screen

3325-count-substrings-with-k-frequency-characters-i

3354-make-array-elements-equal-to-zero

3356-zero-array-transformation-ii

3360-stone-removal-game

3370-smallest-number-with-all-set-bits

3417-zigzag-grid-traversal-with-skip

3436-find-valid-emails

3438-find-valid-pair-of-adjacent-digits-in-string

3452-sum-of-good-numbers

3457-eat-pizzas

3465-find-products-with-valid-serial-numbers

Project Euler

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On this page

Overview

On this page

Overview

2879-display-the-first-three-rows

Caution

DevGod needs to write an editorial for this problem!

py

import pandas as pd

def selectFirstRows(employees: pd.DataFrame) -> pd.DataFrame:
    return employees.head(3)

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