leetcode_solutions

Collection of LeetCode questions to ace the coding interview! - Created using LeetHub.

LeetCode Topics

Array


0011-container-with-most-water
0036-valid-sudoku
0037-sudoku-solver
0066-plus-one
0073-set-matrix-zeroes
0085-maximal-rectangle
0118-pascals-triangle
0120-triangle
0135-candy
0368-largest-divisible-subset
0407-trapping-rain-water-ii
0417-pacific-atlantic-water-flow
0474-ones-and-zeroes
0498-diagonal-traverse
0594-longest-harmonious-subsequence
0611-valid-triangle-number
0717-1-bit-and-2-bit-characters
0744-find-smallest-letter-greater-than-target
0759-set-intersection-size-at-least-two
0797-rabbits-in-forest
0830-largest-triangle-area
0840-magic-squares-in-grid
0934-bitwise-ors-of-subarrays
0940-fruit-into-baskets
0944-delete-columns-to-make-sorted
0945-snakes-and-ladders
0955-delete-columns-to-make-sorted-ii
0960-delete-columns-to-make-sorted-iii
0961-n-repeated-element-in-size-2n-array
1006-vowel-spellchecker
1018-largest-perimeter-triangle
1018-binary-prefix-divisible-by-5
1049-minimum-domino-rotations-for-equal-row
1111-minimum-score-triangulation-of-polygon
1200-minimum-absolute-difference
1227-number-of-equivalent-domino-pairs
1262-greatest-sum-divisible-by-three
1266-minimum-time-visiting-all-points
1292-maximum-side-length-of-a-square-with-sum-less-than-or-equal-to-threshold
1350-remove-sub-folders-from-the-filesystem
1351-count-negative-numbers-in-a-sorted-matrix
1353-find-resultant-array-after-removing-anagrams
1356-sort-integers-by-the-number-of-1-bits
1402-count-square-submatrices-with-all-ones
1421-find-numbers-with-even-number-of-digits
1426-find-n-unique-integers-sum-up-to-zero
1458-max-dot-product-of-two-subsequences
1478-maximum-number-of-events-that-can-be-attended
1510-find-lucky-integer-in-an-array
1536-minimum-swaps-to-arrange-a-binary-grid
1548-check-if-all-1s-are-at-least-length-k-places-away
1582-special-positions-in-a-binary-matrix
1586-longest-subarray-of-1s-after-deleting-one-element
1594-maximum-non-negative-product-in-a-matrix
1612-avoid-flood-in-the-city
1621-number-of-subsequences-that-satisfy-the-given-sum-condition
1628-count-submatrices-with-all-ones
1633-minimum-number-of-increments-on-subarrays-to-form-a-target-array
1656-count-good-triplets
1700-minimum-time-to-make-rope-colorful
1727-largest-submatrix-with-rearrangements
1851-maximum-number-of-events-that-can-be-attended-ii
1877-minimize-maximum-pair-sum-in-array
1878-get-biggest-three-rhombus-sums-in-a-grid
1886-determine-whether-matrix-can-be-obtained-by-rotation
1895-largest-magic-square
1975-maximum-matrix-sum
1980-find-unique-binary-string
1984-minimum-difference-between-highest-and-lowest-of-k-scores
2023-design-movie-rental-system
2048-build-array-from-permutation
2054-two-best-non-overlapping-events
2110-number-of-smooth-descent-periods-of-a-stock
2137-final-value-of-variable-after-performing-operations
2141-maximum-running-time-of-n-computers
2150-kth-smallest-product-of-two-sorted-arrays
2169-simple-bank-system
2170-count-number-of-maximum-bitwise-or-subsets
2180-maximum-number-of-tasks-you-can-assign
2204-find-subsequence-of-length-k-with-the-largest-sum
2215-finding-3-digit-even-numbers
2229-maximum-fruits-harvested-after-at-most-k-steps
2244-number-of-laser-beams-in-a-bank
2249-count-the-hidden-sequences
2262-solving-questions-with-brainpower
2267-minimum-difference-in-sums-after-removal-of-elements
2274-keep-multiplying-found-values-by-two
2277-count-equal-and-divisible-pairs-in-an-array
2280-count-good-triplets-in-an-array
2307-replace-non-coprime-numbers-in-array
2316-count-hills-and-valleys-in-an-array
2324-find-triangular-sum-of-an-array
2343-count-unguarded-cells-in-the-grid
2387-partition-array-such-that-maximum-difference-is-k
2392-successful-pairs-of-spells-and-potions
2394-count-subarrays-with-score-less-than-k
2400-minimum-score-after-removals-on-a-tree
2402-meeting-rooms-iii
2435-paths-in-matrix-whose-sum-is-divisible-by-k
2479-meeting-rooms-iii
2497-maximum-matching-of-players-with-trainers
2498-smallest-subarrays-with-maximum-bitwise-or
2527-count-subarrays-with-fixed-bounds
2529-range-product-queries-of-powers
2618-maximize-the-minimum-powered-city
2625-increment-submatrices-by-one
2626-count-the-number-of-good-subarrays
2661-smallest-missing-non-negative-integer-after-operations
2681-put-marbles-in-bags
2689-rearranging-fruits
2720-minimize-the-maximum-difference-of-pairs
2753-minimum-number-of-operations-to-make-all-array-elements-equal-to-1
2856-count-complete-subarrays-in-an-array
2906-construct-product-matrix
2943-maximize-area-of-square-hole-in-grid
2946-matrix-similarity-after-cyclic-shifts
2975-maximum-square-area-by-removing-fences-from-a-field
2976-minimum-cost-to-convert-string-i
2977-minimum-cost-to-convert-string-ii
3010-divide-an-array-into-subarrays-with-minimum-cost-i
3013-divide-an-array-into-subarrays-with-minimum-cost-ii
3047-find-the-largest-area-of-square-inside-two-rectangles
3070-count-submatrices-with-top-left-element-and-sum-less-than-k
3074-apple-redistribution-into-boxes
3075-maximize-happiness-of-selected-children
3142-longest-unequal-adjacent-groups-subsequence-ii
3152-maximum-value-of-an-ordered-triplet-ii
3154-maximum-value-of-an-ordered-triplet-i
3190-find-minimum-operations-to-make-all-elements-divisible-by-three
3212-count-submatrices-with-equal-frequency-of-x-and-y
3213-count-subarrays-where-max-element-appears-at-least-k-times
3241-divide-array-into-arrays-with-max-difference
3242-count-elements-with-maximum-frequency
3251-maximum-area-of-longest-diagonal-rectangle
3277-find-the-number-of-ways-to-place-people-ii
3296-minimum-number-of-seconds-to-make-mountain-height-zero
3307-find-the-maximum-sum-of-node-values
3314-construct-the-minimum-bitwise-array-i
3315-construct-the-minimum-bitwise-array-ii
3321-type-of-triangle
3379-transformed-array
3381-maximum-subarray-sum-with-length-divisible-by-k
3383-taking-maximum-energy-from-the-mystic-dungeon
3432-count-partitions-with-even-sum-difference
3433-count-mentions-per-user
3437-maximum-total-damage-with-spell-casting
3453-separate-squares-i
3454-separate-squares-ii
3490-find-the-maximum-length-of-valid-subsequence-i
3491-find-the-maximum-length-of-valid-subsequence-ii
3501-delete-nodes-from-linked-list-present-in-array
3507-minimum-pair-removal-to-sort-array-i
3510-minimum-pair-removal-to-sort-array-ii
3512-minimum-operations-to-make-array-sum-divisible-by-k
3531-count-covered-buildings
3546-equal-sum-grid-partition-i
3548-equal-sum-grid-partition-ii
3562-maximum-profit-from-trading-stocks-with-discounts
3567-minimum-absolute-difference-in-sliding-submatrix
3573-best-time-to-buy-and-sell-stock-v
3577-count-the-number-of-computer-unlocking-permutations
3578-count-partitions-with-max-min-difference-at-most-k
3581-the-two-sneaky-numbers-of-digitville
3583-count-special-triplets
3592-find-x-sum-of-all-k-long-subarrays-ii
3606-coupon-code-validator
3610-find-x-sum-of-all-k-long-subarrays-i
3616-make-array-elements-equal-to-zero
3619-adjacent-increasing-subarrays-detection-ii
3620-maximum-number-of-distinct-elements-after-operations
3621-minimum-operations-to-make-array-values-equal-to-k
3622-maximum-frequency-of-an-element-after-performing-operations-i
3623-count-number-of-trapezoids-i
3625-count-number-of-trapezoids-ii
3627-find-minimum-time-to-reach-last-room-i
3628-find-minimum-time-to-reach-last-room-ii
3634-minimum-removals-to-balance-array
3637-trionic-array-i
3640-trionic-array-ii
3643-flip-square-submatrix-vertically
3647-zero-array-transformation-iii
3651-minimum-cost-path-with-teleportations
3652-best-time-to-buy-and-sell-stock-using-strategy
3656-minimum-number-of-operations-to-make-elements-in-array-distinct
3685-count-subarrays-of-length-three-with-a-condition
3719-longest-balanced-subarray-i
3721-longest-balanced-subarray-ii
3733-length-of-longest-v-shaped-diagonal-segment
3741-reschedule-meetings-for-maximum-free-time-ii
3743-reschedule-meetings-for-maximum-free-time-i
3744-minimum-operations-to-make-array-elements-zero
3747-maximum-difference-between-adjacent-elements-in-a-circular-array
3748-sort-matrix-by-diagonals
3788-maximum-unique-subarray-sum-after-deletion
3790-fruits-into-baskets-ii
3791-fruits-into-baskets-iii
3794-find-the-minimum-amount-of-time-to-brew-potions
3827-implement-router
3834-minimum-operations-to-convert-all-elements-to-zero
3851-find-sum-of-array-product-of-magical-sequences
3863-power-grid-maintenance

Greedy


0011-container-with-most-water
0135-candy
0611-valid-triangle-number
0759-set-intersection-size-at-least-two
0797-rabbits-in-forest
0955-delete-columns-to-make-sorted-ii
1018-largest-perimeter-triangle
1049-minimum-domino-rotations-for-equal-row
1262-greatest-sum-divisible-by-three
1382-balance-a-binary-search-tree
1478-maximum-number-of-events-that-can-be-attended
1536-minimum-swaps-to-arrange-a-binary-grid
1612-avoid-flood-in-the-city
1633-minimum-number-of-increments-on-subarrays-to-form-a-target-array
1689-partitioning-into-minimum-number-of-deci-binary-numbers
1700-minimum-time-to-make-rope-colorful
1727-largest-submatrix-with-rearrangements
1818-maximum-score-from-removing-substrings
1877-minimize-maximum-pair-sum-in-array
1975-maximum-matrix-sum
2141-maximum-running-time-of-n-computers
2180-maximum-number-of-tasks-you-can-assign
2387-partition-array-such-that-maximum-difference-is-k
2395-longest-binary-subsequence-less-than-or-equal-to-k
2497-maximum-matching-of-players-with-trainers
2618-maximize-the-minimum-powered-city
2661-smallest-missing-non-negative-integer-after-operations
2681-put-marbles-in-bags
2689-rearranging-fruits
2720-minimize-the-maximum-difference-of-pairs
3074-apple-redistribution-into-boxes
3075-maximize-happiness-of-selected-children
3241-divide-array-into-arrays-with-max-difference
3296-minimum-number-of-seconds-to-make-mountain-height-zero
3307-find-the-maximum-sum-of-node-values
3493-maximum-number-of-operations-to-move-ones-to-the-end
3600-maximize-spanning-tree-stability-with-upgrades
3620-maximum-number-of-distinct-elements-after-operations
3647-zero-array-transformation-iii
3741-reschedule-meetings-for-maximum-free-time-ii
3743-reschedule-meetings-for-maximum-free-time-i
3788-maximum-unique-subarray-sum-after-deletion
3834-minimum-operations-to-convert-all-elements-to-zero

Sorting


0368-largest-divisible-subset
0594-longest-harmonious-subsequence
0611-valid-triangle-number
0759-set-intersection-size-at-least-two
0761-special-binary-string
0900-reordered-power-of-2
1018-largest-perimeter-triangle
1200-minimum-absolute-difference
1262-greatest-sum-divisible-by-three
1353-find-resultant-array-after-removing-anagrams
1356-sort-integers-by-the-number-of-1-bits
1478-maximum-number-of-events-that-can-be-attended
1621-number-of-subsequences-that-satisfy-the-given-sum-condition
1727-largest-submatrix-with-rearrangements
1851-maximum-number-of-events-that-can-be-attended-ii
1877-minimize-maximum-pair-sum-in-array
1878-get-biggest-three-rhombus-sums-in-a-grid
1984-minimum-difference-between-highest-and-lowest-of-k-scores
2054-two-best-non-overlapping-events
2092-find-all-people-with-secret
2141-maximum-running-time-of-n-computers
2180-maximum-number-of-tasks-you-can-assign
2204-find-subsequence-of-length-k-with-the-largest-sum
2215-finding-3-digit-even-numbers
2274-keep-multiplying-found-values-by-two
2387-partition-array-such-that-maximum-difference-is-k
2392-successful-pairs-of-spells-and-potions
2402-meeting-rooms-iii
2479-meeting-rooms-iii
2497-maximum-matching-of-players-with-trainers
2681-put-marbles-in-bags
2689-rearranging-fruits
2943-maximize-area-of-square-hole-in-grid
3010-divide-an-array-into-subarrays-with-minimum-cost-i
3074-apple-redistribution-into-boxes
3075-maximize-happiness-of-selected-children
3241-divide-array-into-arrays-with-max-difference
3277-find-the-number-of-ways-to-place-people-ii
3307-find-the-maximum-sum-of-node-values
3321-type-of-triangle
3433-count-mentions-per-user
3437-maximum-total-damage-with-spell-casting
3531-count-covered-buildings
3567-minimum-absolute-difference-in-sliding-submatrix
3606-coupon-code-validator
3620-maximum-number-of-distinct-elements-after-operations
3622-maximum-frequency-of-an-element-after-performing-operations-i
3634-minimum-removals-to-balance-array
3647-zero-array-transformation-iii
3748-sort-matrix-by-diagonals

Heap (Priority Queue)


0407-trapping-rain-water-ii
1478-maximum-number-of-events-that-can-be-attended
1612-avoid-flood-in-the-city
1878-get-biggest-three-rhombus-sums-in-a-grid
2023-design-movie-rental-system
2054-two-best-non-overlapping-events
2204-find-subsequence-of-length-k-with-the-largest-sum
2267-minimum-difference-in-sums-after-removal-of-elements
2402-meeting-rooms-iii
2479-meeting-rooms-iii
2681-put-marbles-in-bags
3013-divide-an-array-into-subarrays-with-minimum-cost-ii
3296-minimum-number-of-seconds-to-make-mountain-height-zero
3507-minimum-pair-removal-to-sort-array-i
3510-minimum-pair-removal-to-sort-array-ii
3592-find-x-sum-of-all-k-long-subarrays-ii
3610-find-x-sum-of-all-k-long-subarrays-i
3627-find-minimum-time-to-reach-last-room-i
3628-find-minimum-time-to-reach-last-room-ii
3647-zero-array-transformation-iii
3650-minimum-cost-path-with-edge-reversals
3678-design-task-manager
3863-power-grid-maintenance

Dynamic Programming


0085-maximal-rectangle
0118-pascals-triangle
0120-triangle
0368-largest-divisible-subset
0474-ones-and-zeroes
0712-minimum-ascii-delete-sum-for-two-strings
0799-champagne-tower
0806-domino-and-tromino-tiling
0868-push-dominoes
0934-bitwise-ors-of-subarrays
0960-delete-columns-to-make-sorted-iii
1111-minimum-score-triangulation-of-polygon
1262-greatest-sum-divisible-by-three
1402-count-square-submatrices-with-all-ones
1411-number-of-ways-to-paint-n-3-grid
1458-max-dot-product-of-two-subsequences
1586-longest-subarray-of-1s-after-deleting-one-element
1594-maximum-non-negative-product-in-a-matrix
1628-count-submatrices-with-all-ones
1633-minimum-number-of-increments-on-subarrays-to-form-a-target-array
1653-minimum-deletions-to-make-string-balanced
1700-minimum-time-to-make-rope-colorful
1732-minimum-one-bit-operations-to-make-integers-zero
1851-maximum-number-of-events-that-can-be-attended-ii
1888-minimum-number-of-flips-to-make-the-binary-string-alternating
1986-largest-color-value-in-a-directed-graph
2028-the-earliest-and-latest-rounds-where-players-compete
2054-two-best-non-overlapping-events
2110-number-of-smooth-descent-periods-of-a-stock
2147-number-of-ways-to-divide-a-long-corridor
2262-solving-questions-with-brainpower
2267-minimum-difference-in-sums-after-removal-of-elements
2395-longest-binary-subsequence-less-than-or-equal-to-k
2408-number-of-people-aware-of-a-secret
2415-count-the-number-of-ideal-arrays
2435-paths-in-matrix-whose-sum-is-divisible-by-k
2882-ways-to-express-an-integer-as-sum-of-powers
2977-minimum-cost-to-convert-string-ii
3129-find-all-possible-stable-binary-arrays-i
3130-find-all-possible-stable-binary-arrays-ii
3142-longest-unequal-adjacent-groups-subsequence-ii
3233-maximize-the-number-of-partitions-after-operations
3243-count-the-number-of-powerful-integers
3307-find-the-maximum-sum-of-node-values
3437-maximum-total-damage-with-spell-casting
3490-find-the-maximum-length-of-valid-subsequence-i
3491-find-the-maximum-length-of-valid-subsequence-ii
3562-maximum-profit-from-trading-stocks-with-discounts
3573-best-time-to-buy-and-sell-stock-v
3578-count-partitions-with-max-min-difference-at-most-k
3618-find-the-original-typed-string-ii
3629-total-characters-in-string-after-transformations-i
3637-count-number-of-balanced-permutations
3640-trionic-array-ii
3651-minimum-cost-path-with-teleportations
3733-length-of-longest-v-shaped-diagonal-segment
3851-find-sum-of-array-product-of-magical-sequences

Hash Table


0036-valid-sudoku
0037-sudoku-solver
0073-set-matrix-zeroes
0166-fraction-to-recurring-decimal
0594-longest-harmonious-subsequence
0797-rabbits-in-forest
0840-magic-squares-in-grid
0900-reordered-power-of-2
0940-fruit-into-baskets
0961-n-repeated-element-in-size-2n-array
1006-vowel-spellchecker
1015-smallest-integer-divisible-by-k
1218-lowest-common-ancestor-of-deepest-leaves
1227-number-of-equivalent-domino-pairs
1264-maximum-number-of-words-you-can-type
1353-find-resultant-array-after-removing-anagrams
1461-check-if-a-string-contains-all-binary-codes-of-size-k
1510-find-lucky-integer-in-an-array
1612-avoid-flood-in-the-city
1980-find-unique-binary-string
1986-largest-color-value-in-a-directed-graph
2023-design-movie-rental-system
2059-unique-length-3-palindromic-subsequences
2169-simple-bank-system
2174-next-greater-numerically-balanced-number
2204-find-subsequence-of-length-k-with-the-largest-sum
2215-finding-3-digit-even-numbers
2274-keep-multiplying-found-values-by-two
2402-meeting-rooms-iii
2479-meeting-rooms-iii
2626-count-the-number-of-good-subarrays
2661-smallest-missing-non-negative-integer-after-operations
2689-rearranging-fruits
2856-count-complete-subarrays-in-an-array
2975-maximum-square-area-by-removing-fences-from-a-field
3013-divide-an-array-into-subarrays-with-minimum-cost-ii
3242-count-elements-with-maximum-frequency
3381-maximum-subarray-sum-with-length-divisible-by-k
3437-maximum-total-damage-with-spell-casting
3501-delete-nodes-from-linked-list-present-in-array
3507-minimum-pair-removal-to-sort-array-i
3510-minimum-pair-removal-to-sort-array-ii
3531-count-covered-buildings
3548-find-the-count-of-good-integers
3548-equal-sum-grid-partition-ii
3581-the-two-sneaky-numbers-of-digitville
3583-count-special-triplets
3592-find-x-sum-of-all-k-long-subarrays-ii
3606-coupon-code-validator
3610-find-x-sum-of-all-k-long-subarrays-i
3621-minimum-operations-to-make-array-values-equal-to-k
3623-count-number-of-trapezoids-i
3625-count-number-of-trapezoids-ii
3629-total-characters-in-string-after-transformations-i
3656-minimum-number-of-operations-to-make-elements-in-array-distinct
3678-design-task-manager
3713-longest-balanced-substring-i
3714-longest-balanced-substring-ii
3719-longest-balanced-subarray-i
3721-longest-balanced-subarray-ii
3753-maximum-difference-between-even-and-odd-frequency-i
3754-maximum-manhattan-distance-after-k-changes
3788-maximum-unique-subarray-sum-after-deletion
3827-implement-router
3834-minimum-operations-to-convert-all-elements-to-zero
3863-power-grid-maintenance
3872-find-most-frequent-vowel-and-consonant

Tree


0110-balanced-binary-tree
1022-sum-of-root-to-leaf-binary-numbers
1218-lowest-common-ancestor-of-deepest-leaves
1382-balance-a-binary-search-tree
2400-minimum-score-after-removals-on-a-tree
2872-maximum-number-of-k-divisible-components
3307-find-the-maximum-sum-of-node-values
3562-maximum-profit-from-trading-stocks-with-discounts
3633-maximize-the-number-of-target-nodes-after-connecting-trees-i
3645-maximize-the-number-of-target-nodes-after-connecting-trees-ii

Depth-First Search


0110-balanced-binary-tree
0386-lexicographical-numbers
0417-pacific-atlantic-water-flow
1022-sum-of-root-to-leaf-binary-numbers
1218-lowest-common-ancestor-of-deepest-leaves
1350-remove-sub-folders-from-the-filesystem
1382-balance-a-binary-search-tree
1747-lexicographically-smallest-string-after-applying-operations
2092-find-all-people-with-secret
2400-minimum-score-after-removals-on-a-tree
2438-find-closest-node-to-given-two-nodes
2872-maximum-number-of-k-divisible-components
3562-maximum-profit-from-trading-stocks-with-discounts
3633-maximize-the-number-of-target-nodes-after-connecting-trees-i
3645-maximize-the-number-of-target-nodes-after-connecting-trees-ii
3863-power-grid-maintenance

Breadth-First Search


0407-trapping-rain-water-ii
0417-pacific-atlantic-water-flow
0945-snakes-and-ladders
1218-lowest-common-ancestor-of-deepest-leaves
1747-lexicographically-smallest-string-after-applying-operations
2092-find-all-people-with-secret
3633-maximize-the-number-of-target-nodes-after-connecting-trees-i
3645-maximize-the-number-of-target-nodes-after-connecting-trees-ii
3863-power-grid-maintenance

Binary Tree


0110-balanced-binary-tree
1022-sum-of-root-to-leaf-binary-numbers
1218-lowest-common-ancestor-of-deepest-leaves
1382-balance-a-binary-search-tree

Math


0066-plus-one
0067-add-binary
0166-fraction-to-recurring-decimal
0231-power-of-two
0326-power-of-three
0368-largest-divisible-subset
0762-prime-number-of-set-bits-in-binary-representation
0797-rabbits-in-forest
0830-largest-triangle-area
0840-magic-squares-in-grid
0900-reordered-power-of-2
1015-smallest-integer-divisible-by-k
1018-largest-perimeter-triangle
1266-minimum-time-visiting-all-points
1411-convert-binary-number-in-a-linked-list-to-integer
1421-find-numbers-with-even-number-of-digits
1426-find-n-unique-integers-sum-up-to-zero
1440-convert-integer-to-the-sum-of-two-no-zero-integers
1523-count-odd-numbers-in-an-interval-range
1622-fancy-sequence
1636-number-of-substrings-with-only-1s
1642-water-bottles
1680-concatenation-of-consecutive-binary-numbers
1817-calculate-money-in-leetcode-bank
1878-get-biggest-three-rhombus-sums-in-a-grid
1925-count-square-sum-triples
2110-number-of-smooth-descent-periods-of-a-stock
2147-number-of-ways-to-divide-a-long-corridor
2174-next-greater-numerically-balanced-number
2244-number-of-laser-beams-in-a-bank
2288-count-operations-to-obtain-zero
2307-replace-non-coprime-numbers-in-array
2324-find-triangular-sum-of-an-array
2415-count-the-number-of-ideal-arrays
2661-smallest-missing-non-negative-integer-after-operations
2753-minimum-number-of-operations-to-make-all-array-elements-equal-to-1
2946-matrix-similarity-after-cyclic-shifts
2998-count-symmetric-integers
3047-find-the-largest-area-of-square-inside-two-rectangles
3172-divisible-and-non-divisible-sums-difference
3190-find-minimum-operations-to-make-all-elements-divisible-by-three
3201-distribute-candies-among-children-ii
3243-count-the-number-of-powerful-integers
3277-find-the-number-of-ways-to-place-people-ii
3279-alice-and-bob-playing-flower-game
3296-minimum-number-of-seconds-to-make-mountain-height-zero
3321-type-of-triangle
3336-water-bottles-ii
3432-count-partitions-with-even-sum-difference
3433-count-mentions-per-user
3512-minimum-operations-to-make-array-sum-divisible-by-k
3548-find-the-count-of-good-integers
3577-count-the-number-of-computer-unlocking-permutations
3581-the-two-sneaky-numbers-of-digitville
3600-find-the-k-th-character-in-string-game-i
3623-count-number-of-trapezoids-i
3625-count-number-of-trapezoids-ii
3629-total-characters-in-string-after-transformations-i
3637-count-number-of-balanced-permutations
3676-smallest-number-with-all-set-bits
3682-count-the-number-of-arrays-with-k-matching-adjacent-elements
3744-minimum-operations-to-make-array-elements-zero
3754-maximum-manhattan-distance-after-k-changes
3768-check-if-digits-are-equal-in-string-after-operations-i
3830-find-closest-person
3851-find-sum-of-array-product-of-magical-sequences

String


0067-add-binary
0165-compare-version-numbers
0166-fraction-to-recurring-decimal
0474-ones-and-zeroes
0696-count-binary-substrings
0712-minimum-ascii-delete-sum-for-two-strings
0761-special-binary-string
0868-push-dominoes
0944-delete-columns-to-make-sorted
0955-delete-columns-to-make-sorted-ii
0960-delete-columns-to-make-sorted-iii
1006-vowel-spellchecker
1058-lexicographically-smallest-equivalent-string
1264-maximum-number-of-words-you-can-type
1302-delete-characters-to-make-fancy-string
1350-remove-sub-folders-from-the-filesystem
1353-find-resultant-array-after-removing-anagrams
1404-number-of-steps-to-reduce-a-number-in-binary-representation-to-one
1415-the-k-th-lexicographical-string-of-all-happy-strings-of-length-n
1461-check-if-a-string-contains-all-binary-codes-of-size-k
1545-find-kth-bit-in-nth-binary-string
1636-number-of-substrings-with-only-1s
1653-minimum-deletions-to-make-string-balanced
1689-partitioning-into-minimum-number-of-deci-binary-numbers
1700-minimum-time-to-make-rope-colorful
1747-lexicographically-smallest-string-after-applying-operations
1758-minimum-changes-to-make-alternating-binary-string
1784-check-if-binary-string-has-at-most-one-segment-of-ones
1818-maximum-score-from-removing-substrings
1888-minimum-number-of-flips-to-make-the-binary-string-alternating
1980-find-unique-binary-string
2059-unique-length-3-palindromic-subsequences
2137-final-value-of-variable-after-performing-operations
2147-number-of-ways-to-divide-a-long-corridor
2211-count-collisions-on-a-road
2244-number-of-laser-beams-in-a-bank
2346-largest-3-same-digit-number-in-string
2395-longest-binary-subsequence-less-than-or-equal-to-k
2483-minimum-penalty-for-a-shop
2976-minimum-cost-to-convert-string-i
2977-minimum-cost-to-convert-string-ii
3142-longest-unequal-adjacent-groups-subsequence-ii
3233-maximize-the-number-of-partitions-after-operations
3243-count-the-number-of-powerful-integers
3396-valid-word
3479-count-the-number-of-substrings-with-dominant-ones
3493-maximum-number-of-operations-to-move-ones-to-the-end
3606-coupon-code-validator
3617-find-the-original-typed-string-i
3618-find-the-original-typed-string-ii
3629-total-characters-in-string-after-transformations-i
3637-count-number-of-balanced-permutations
3683-find-the-lexicographically-largest-string-from-the-box-i
3713-longest-balanced-substring-i
3714-longest-balanced-substring-ii
3753-maximum-difference-between-even-and-odd-frequency-i
3754-maximum-manhattan-distance-after-k-changes
3761-maximum-difference-between-even-and-odd-frequency-ii
3768-check-if-digits-are-equal-in-string-after-operations-i
3872-find-most-frequent-vowel-and-consonant

Enumeration


0900-reordered-power-of-2
1656-count-good-triplets
1747-lexicographically-smallest-string-after-applying-operations
1925-count-square-sum-triples
2170-count-number-of-maximum-bitwise-or-subsets
2174-next-greater-numerically-balanced-number
2215-finding-3-digit-even-numbers
2837-minimum-operations-to-make-the-integer-zero
2975-maximum-square-area-by-removing-fences-from-a-field
2998-count-symmetric-integers
3010-divide-an-array-into-subarrays-with-minimum-cost-i
3201-distribute-candies-among-children-ii
3277-find-the-number-of-ways-to-place-people-ii
3479-count-the-number-of-substrings-with-dominant-ones
3546-equal-sum-grid-partition-i
3548-find-the-count-of-good-integers
3548-equal-sum-grid-partition-ii
3683-find-the-lexicographically-largest-string-from-the-box-i
3713-longest-balanced-substring-i
3741-reschedule-meetings-for-maximum-free-time-ii
3761-maximum-difference-between-even-and-odd-frequency-ii

Combinatorics


2324-find-triangular-sum-of-an-array
2415-count-the-number-of-ideal-arrays
3201-distribute-candies-among-children-ii
3548-find-the-count-of-good-integers
3577-count-the-number-of-computer-unlocking-permutations
3637-count-number-of-balanced-permutations
3682-count-the-number-of-arrays-with-k-matching-adjacent-elements
3768-check-if-digits-are-equal-in-string-after-operations-i
3851-find-sum-of-array-product-of-magical-sequences

Binary Search


0611-valid-triangle-number
0744-find-smallest-letter-greater-than-target
1292-maximum-side-length-of-a-square-with-sum-less-than-or-equal-to-threshold
1351-count-negative-numbers-in-a-sorted-matrix
1612-avoid-flood-in-the-city
1621-number-of-subsequences-that-satisfy-the-given-sum-condition
1851-maximum-number-of-events-that-can-be-attended-ii
2054-two-best-non-overlapping-events
2141-maximum-running-time-of-n-computers
2150-kth-smallest-product-of-two-sorted-arrays
2180-maximum-number-of-tasks-you-can-assign
2229-maximum-fruits-harvested-after-at-most-k-steps
2280-count-good-triplets-in-an-array
2392-successful-pairs-of-spells-and-potions
2394-count-subarrays-with-score-less-than-k
2498-smallest-subarrays-with-maximum-bitwise-or
2618-maximize-the-minimum-powered-city
2720-minimize-the-maximum-difference-of-pairs
3296-minimum-number-of-seconds-to-make-mountain-height-zero
3437-maximum-total-damage-with-spell-casting
3453-separate-squares-i
3454-separate-squares-ii
3600-maximize-spanning-tree-stability-with-upgrades
3619-adjacent-increasing-subarrays-detection-ii
3622-maximum-frequency-of-an-element-after-performing-operations-i
3790-fruits-into-baskets-ii
3791-fruits-into-baskets-iii
3827-implement-router

Divide and Conquer


0190-reverse-bits
0761-special-binary-string
1382-balance-a-binary-search-tree
2280-count-good-triplets-in-an-array
3719-longest-balanced-subarray-i
3721-longest-balanced-subarray-ii

Binary Indexed Tree


2280-count-good-triplets-in-an-array

Segment Tree


1622-fancy-sequence
2280-count-good-triplets-in-an-array
3454-separate-squares-ii
3719-longest-balanced-subarray-i
3721-longest-balanced-subarray-ii
3790-fruits-into-baskets-ii
3791-fruits-into-baskets-iii

Merge Sort


2280-count-good-triplets-in-an-array

Ordered Set


2023-design-movie-rental-system
2280-count-good-triplets-in-an-array
3507-minimum-pair-removal-to-sort-array-i
3510-minimum-pair-removal-to-sort-array-ii
3678-design-task-manager
3790-fruits-into-baskets-ii
3791-fruits-into-baskets-iii
3827-implement-router
3863-power-grid-maintenance

Sliding Window


0594-longest-harmonious-subsequence
0940-fruit-into-baskets
1586-longest-subarray-of-1s-after-deleting-one-element
1888-minimum-number-of-flips-to-make-the-binary-string-alternating
1984-minimum-difference-between-highest-and-lowest-of-k-scores
2229-maximum-fruits-harvested-after-at-most-k-steps
2394-count-subarrays-with-score-less-than-k
2498-smallest-subarrays-with-maximum-bitwise-or
2527-count-subarrays-with-fixed-bounds
2618-maximize-the-minimum-powered-city
2626-count-the-number-of-good-subarrays
2856-count-complete-subarrays-in-an-array
3013-divide-an-array-into-subarrays-with-minimum-cost-ii
3213-count-subarrays-where-max-element-appears-at-least-k-times
3479-count-the-number-of-substrings-with-dominant-ones
3578-count-partitions-with-max-min-difference-at-most-k
3592-find-x-sum-of-all-k-long-subarrays-ii
3610-find-x-sum-of-all-k-long-subarrays-i
3622-maximum-frequency-of-an-element-after-performing-operations-i
3634-minimum-removals-to-balance-array
3652-best-time-to-buy-and-sell-stock-using-strategy
3743-reschedule-meetings-for-maximum-free-time-i
3761-maximum-difference-between-even-and-odd-frequency-ii

Prefix Sum


1292-maximum-side-length-of-a-square-with-sum-less-than-or-equal-to-threshold
1878-get-biggest-three-rhombus-sums-in-a-grid
1895-largest-magic-square
2059-unique-length-3-palindromic-subsequences
2229-maximum-fruits-harvested-after-at-most-k-steps
2249-count-the-hidden-sequences
2394-count-subarrays-with-score-less-than-k
2483-minimum-penalty-for-a-shop
2529-range-product-queries-of-powers
2618-maximize-the-minimum-powered-city
2625-increment-submatrices-by-one
2906-construct-product-matrix
3070-count-submatrices-with-top-left-element-and-sum-less-than-k
3129-find-all-possible-stable-binary-arrays-i
3130-find-all-possible-stable-binary-arrays-ii
3212-count-submatrices-with-equal-frequency-of-x-and-y
3381-maximum-subarray-sum-with-length-divisible-by-k
3383-taking-maximum-energy-from-the-mystic-dungeon
3432-count-partitions-with-even-sum-difference
3546-equal-sum-grid-partition-i
3548-equal-sum-grid-partition-ii
3578-count-partitions-with-max-min-difference-at-most-k
3616-make-array-elements-equal-to-zero
3618-find-the-original-typed-string-ii
3622-maximum-frequency-of-an-element-after-performing-operations-i
3647-zero-array-transformation-iii
3652-best-time-to-buy-and-sell-stock-using-strategy
3714-longest-balanced-substring-ii
3719-longest-balanced-subarray-i
3721-longest-balanced-subarray-ii
3761-maximum-difference-between-even-and-odd-frequency-ii
3794-find-the-minimum-amount-of-time-to-brew-potions

Number Theory


2307-replace-non-coprime-numbers-in-array
2415-count-the-number-of-ideal-arrays
2753-minimum-number-of-operations-to-make-all-array-elements-equal-to-1
3768-check-if-digits-are-equal-in-string-after-operations-i

Queue


2180-maximum-number-of-tasks-you-can-assign
2408-number-of-people-aware-of-a-secret
2527-count-subarrays-with-fixed-bounds
2618-maximize-the-minimum-powered-city
3578-count-partitions-with-max-min-difference-at-most-k
3827-implement-router

Monotonic Queue


2180-maximum-number-of-tasks-you-can-assign
2527-count-subarrays-with-fixed-bounds
3578-count-partitions-with-max-min-difference-at-most-k

Two Pointers


0011-container-with-most-water
0165-compare-version-numbers
0611-valid-triangle-number
0696-count-binary-substrings
0868-push-dominoes
1621-number-of-subsequences-that-satisfy-the-given-sum-condition
1877-minimize-maximum-pair-sum-in-array
2392-successful-pairs-of-spells-and-potions
2497-maximum-matching-of-players-with-trainers
3437-maximum-total-damage-with-spell-casting
3643-flip-square-submatrix-vertically
3683-find-the-lexicographically-largest-string-from-the-box-i

Counting


0594-longest-harmonious-subsequence
0900-reordered-power-of-2
1227-number-of-equivalent-domino-pairs
1356-sort-integers-by-the-number-of-1-bits
1510-find-lucky-integer-in-an-array
1986-largest-color-value-in-a-directed-graph
2174-next-greater-numerically-balanced-number
3242-count-elements-with-maximum-frequency
3437-maximum-total-damage-with-spell-casting
3493-maximum-number-of-operations-to-move-ones-to-the-end
3583-count-special-triplets
3629-total-characters-in-string-after-transformations-i
3713-longest-balanced-substring-i
3753-maximum-difference-between-even-and-odd-frequency-i
3754-maximum-manhattan-distance-after-k-changes
3872-find-most-frequent-vowel-and-consonant

Simulation


0067-add-binary
0498-diagonal-traverse
1404-number-of-steps-to-reduce-a-number-in-binary-representation-to-one
1545-find-kth-bit-in-nth-binary-string
1642-water-bottles
1680-concatenation-of-consecutive-binary-numbers
2048-build-array-from-permutation
2137-final-value-of-variable-after-performing-operations
2169-simple-bank-system
2211-count-collisions-on-a-road
2274-keep-multiplying-found-values-by-two
2288-count-operations-to-obtain-zero
2324-find-triangular-sum-of-an-array
2343-count-unguarded-cells-in-the-grid
2402-meeting-rooms-iii
2408-number-of-people-aware-of-a-secret
2479-meeting-rooms-iii
2946-matrix-similarity-after-cyclic-shifts
3336-water-bottles-ii
3379-transformed-array
3433-count-mentions-per-user
3507-minimum-pair-removal-to-sort-array-i
3510-minimum-pair-removal-to-sort-array-ii
3600-find-the-k-th-character-in-string-game-i
3616-make-array-elements-equal-to-zero
3768-check-if-digits-are-equal-in-string-after-operations-i
3790-fruits-into-baskets-ii
3794-find-the-minimum-amount-of-time-to-brew-potions

Graph


1986-largest-color-value-in-a-directed-graph
2092-find-all-people-with-secret
2438-find-closest-node-to-given-two-nodes
3627-find-minimum-time-to-reach-last-room-i
3628-find-minimum-time-to-reach-last-room-ii
3863-power-grid-maintenance

Matrix


0036-valid-sudoku
0037-sudoku-solver
0073-set-matrix-zeroes
0085-maximal-rectangle
0407-trapping-rain-water-ii
0417-pacific-atlantic-water-flow
0498-diagonal-traverse
0840-magic-squares-in-grid
0945-snakes-and-ladders
1292-maximum-side-length-of-a-square-with-sum-less-than-or-equal-to-threshold
1351-count-negative-numbers-in-a-sorted-matrix
1402-count-square-submatrices-with-all-ones
1536-minimum-swaps-to-arrange-a-binary-grid
1582-special-positions-in-a-binary-matrix
1594-maximum-non-negative-product-in-a-matrix
1628-count-submatrices-with-all-ones
1727-largest-submatrix-with-rearrangements
1878-get-biggest-three-rhombus-sums-in-a-grid
1886-determine-whether-matrix-can-be-obtained-by-rotation
1895-largest-magic-square
1975-maximum-matrix-sum
2244-number-of-laser-beams-in-a-bank
2343-count-unguarded-cells-in-the-grid
2435-paths-in-matrix-whose-sum-is-divisible-by-k
2625-increment-submatrices-by-one
2906-construct-product-matrix
2946-matrix-similarity-after-cyclic-shifts
3070-count-submatrices-with-top-left-element-and-sum-less-than-k
3212-count-submatrices-with-equal-frequency-of-x-and-y
3546-equal-sum-grid-partition-i
3548-equal-sum-grid-partition-ii
3567-minimum-absolute-difference-in-sliding-submatrix
3627-find-minimum-time-to-reach-last-room-i
3628-find-minimum-time-to-reach-last-room-ii
3643-flip-square-submatrix-vertically
3651-minimum-cost-path-with-teleportations
3733-length-of-longest-v-shaped-diagonal-segment
3748-sort-matrix-by-diagonals

Shortest Path


2976-minimum-cost-to-convert-string-i
2977-minimum-cost-to-convert-string-ii
3627-find-minimum-time-to-reach-last-room-i
3628-find-minimum-time-to-reach-last-room-ii
3650-minimum-cost-path-with-edge-reversals

Bit Manipulation


0067-add-binary
0190-reverse-bits
0231-power-of-two
0401-binary-watch
0693-binary-number-with-alternating-bits
0762-prime-number-of-set-bits-in-binary-representation
0868-binary-gap
0934-bitwise-ors-of-subarrays
1009-complement-of-base-10-integer
1018-binary-prefix-divisible-by-5
1356-sort-integers-by-the-number-of-1-bits
1404-number-of-steps-to-reduce-a-number-in-binary-representation-to-one
1461-check-if-a-string-contains-all-binary-codes-of-size-k
1680-concatenation-of-consecutive-binary-numbers
1732-minimum-one-bit-operations-to-make-integers-zero
2059-unique-length-3-palindromic-subsequences
2170-count-number-of-maximum-bitwise-or-subsets
2400-minimum-score-after-removals-on-a-tree
2498-smallest-subarrays-with-maximum-bitwise-or
2529-range-product-queries-of-powers
2837-minimum-operations-to-make-the-integer-zero
3233-maximize-the-number-of-partitions-after-operations
3307-find-the-maximum-sum-of-node-values
3314-construct-the-minimum-bitwise-array-i
3315-construct-the-minimum-bitwise-array-ii
3600-find-the-k-th-character-in-string-game-i
3676-smallest-number-with-all-set-bits
3744-minimum-operations-to-make-array-elements-zero
3851-find-sum-of-array-product-of-magical-sequences

Topological Sort


1986-largest-color-value-in-a-directed-graph

Memoization


1732-minimum-one-bit-operations-to-make-integers-zero
1986-largest-color-value-in-a-directed-graph
2028-the-earliest-and-latest-rounds-where-players-compete
2395-longest-binary-subsequence-less-than-or-equal-to-k
3733-length-of-longest-v-shaped-diagonal-segment

Union Find


1058-lexicographically-smallest-equivalent-string
2092-find-all-people-with-secret
3863-power-grid-maintenance

Trie


0386-lexicographical-numbers
0440-k-th-smallest-in-lexicographical-order
1350-remove-sub-folders-from-the-filesystem
2977-minimum-cost-to-convert-string-ii

Recursion


0231-power-of-two
0326-power-of-three
1545-find-kth-bit-in-nth-binary-string
3600-find-the-k-th-character-in-string-game-i

Linked List


1411-convert-binary-number-in-a-linked-list-to-integer
3501-delete-nodes-from-linked-list-present-in-array
3507-minimum-pair-removal-to-sort-array-i
3510-minimum-pair-removal-to-sort-array-ii

Stack


0085-maximal-rectangle
1628-count-submatrices-with-all-ones
1633-minimum-number-of-increments-on-subarrays-to-form-a-target-array
1653-minimum-deletions-to-make-string-balanced
1818-maximum-score-from-removing-substrings
2211-count-collisions-on-a-road
2307-replace-non-coprime-numbers-in-array
3834-minimum-operations-to-convert-all-elements-to-zero

Backtracking


0037-sudoku-solver
0401-binary-watch
1415-the-k-th-lexicographical-string-of-all-happy-strings-of-length-n
1980-find-unique-binary-string
2170-count-number-of-maximum-bitwise-or-subsets
2174-next-greater-numerically-balanced-number

Monotonic Stack


0085-maximal-rectangle
1628-count-submatrices-with-all-ones
1633-minimum-number-of-increments-on-subarrays-to-form-a-target-array
3834-minimum-operations-to-convert-all-elements-to-zero

Geometry


0830-largest-triangle-area
1266-minimum-time-visiting-all-points
3047-find-the-largest-area-of-square-inside-two-rectangles
3277-find-the-number-of-ways-to-place-people-ii
3623-count-number-of-trapezoids-i
3625-count-number-of-trapezoids-ii

Brainteaser


2837-minimum-operations-to-make-the-integer-zero
3577-count-the-number-of-computer-unlocking-permutations

Design


1622-fancy-sequence
2023-design-movie-rental-system
2169-simple-bank-system
3678-design-task-manager
3827-implement-router

Bitmask


3233-maximize-the-number-of-partitions-after-operations
3851-find-sum-of-array-product-of-magical-sequences

Line Sweep


3454-separate-squares-ii

Doubly-Linked List


3507-minimum-pair-removal-to-sort-array-i
3510-minimum-pair-removal-to-sort-array-ii

Graph Theory


2976-minimum-cost-to-convert-string-i
2977-minimum-cost-to-convert-string-ii
3600-maximize-spanning-tree-stability-with-upgrades
3650-minimum-cost-path-with-edge-reversals

Binary Search Tree


1382-balance-a-binary-search-tree

Rolling Hash


1461-check-if-a-string-contains-all-binary-codes-of-size-k

Hash Function


1461-check-if-a-string-contains-all-binary-codes-of-size-k

Union-Find


3600-maximize-spanning-tree-stability-with-upgrades

Minimum Spanning Tree


3600-maximize-spanning-tree-stability-with-upgrades