Files

questions
- 1-bit-and-2-bit-characters
- 132-pattern
- 3sum-closest
- 3sum
- 4sum-ii
- 4sum
- accounts-merge
- actors-and-directors-who-cooperated-at-least-three-times
- add-and-search-word-data-structure-design
- add-binary
- add-digits
- add-one-row-to-tree
- add-strings
- add-to-array-form-of-integer
- add-two-numbers-ii
- add-two-numbers
- alien-dictionary
- all-nodes-distance-k-in-binary-tree
- all-oone-data-structure
- all-paths-from-source-to-target
- all-possible-full-binary-trees
- ambiguous-coordinates
- android-unlock-patterns
- angle-between-hands-of-a-clock
- arithmetic-slices-ii-subsequence
- arithmetic-slices
- arranging-coins
- array-nesting
- array-partition-i
- array-partition
- article-views-i
- assign-cookies
- asteroid-collision
- available-captures-for-rook
- average-of-levels-in-binary-tree
- backspace-string-compare
- bag-of-tokens
- balanced-binary-tree
- base-7
- baseball-game
- basic-calculator-ii
- basic-calculator
- battleships-in-a-board
- beautiful-arrangement-ii
- beautiful-arrangement
- beautiful-array
- best-time-to-buy-and-sell-stock-ii
- best-time-to-buy-and-sell-stock-iii
- best-time-to-buy-and-sell-stock-iv
- best-time-to-buy-and-sell-stock-with-cooldown
- best-time-to-buy-and-sell-stock-with-transaction-fee
- best-time-to-buy-and-sell-stock
- big-countries
- binary-gap
- binary-number-with-alternating-bits
- binary-prefix-divisible-by-5
- binary-search-tree-iterator
- binary-search
- binary-tree-cameras
- binary-tree-inorder-traversal
- binary-tree-level-order-traversal-ii
- binary-tree-level-order-traversal
- binary-tree-maximum-path-sum
- binary-tree-paths
- binary-tree-postorder-traversal
- binary-tree-preorder-traversal
- binary-tree-pruning
- binary-tree-right-side-view
- binary-tree-tilt
- binary-tree-vertical-order-traversal
- binary-tree-zigzag-level-order-traversal
- binary-trees-with-factors
- binary-watch
- bitwise-and-of-numbers-range
- boats-to-save-people
- brick-wall
- broken-calculator
- buddy-strings
- bulb-switcher
- bulls-and-cows
- burst-balloons
- campus-bikes-ii
- campus-bikes
- can-place-flowers
- candy
- car-pooling
- cells-with-odd-values-in-a-matrix
- champagne-tower
- cheapest-flights-within-k-stops
- check-array-formation-through-concatenation
- check-completeness-of-a-binary-tree
- check-if-a-string-contains-all-binary-codes-of-size-k
- check-if-a-string-is-a-valid-sequence-from-root-to-leaves-path-in-a-binary-tree
- check-if-it-is-a-straight-line
- check-if-two-string-arrays-are-equivalent
- classes-more-than-5-students
- climbing-stairs
- clone-graph
- closest-binary-search-tree-value
- coin-change-2
- coin-change-ii
- coin-change
- combination-sum-ii
- combination-sum-iii
- combination-sum-iv
- combination-sum
- combinations
- combine-two-tables
- compare-version-numbers
- complement-of-base-10-integer
- complex-number-multiplication
- consecutive-characters
- consecutive-numbers
- construct-binary-search-tree-from-preorder-traversal
- construct-binary-tree-from-inorder-and-postorder-traversal
- construct-binary-tree-from-preorder-and-inorder-traversal
- construct-binary-tree-from-string
- construct-quad-tree
- construct-string-from-binary-tree
- construct-the-rectangle
- container-with-most-water
- contains-duplicate-ii
- contains-duplicate-iii
- contains-duplicate
- contiguous-array
- continuous-subarray-sum
- convert-a-number-to-hexadecimal
- convert-binary-number-in-a-linked-list-to-integer
- convert-binary-search-tree-to-sorted-doubly-linked-list
- convert-bst-to-greater-tree
- convert-sorted-array-to-binary-search-tree
- convert-sorted-list-to-binary-search-tree
- copy-list-with-random-pointer
- count-all-valid-pickup-and-delivery-options
- count-and-say
- count-binary-substrings
- count-complete-tree-nodes
- count-equal-and-divisible-pairs-in-an-array
- count-good-nodes-in-binary-tree
- count-integers-with-even-digit-sum
- count-numbers-with-unique-digits
- count-of-smaller-numbers-after-self
- count-operations-to-obtain-zero
- count-primes
- count-sorted-vowel-strings
- count-square-submatrices-with-all-ones
- count-vowels-permutation
- counting-bits
- counting-elements
- counting-words-with-a-given-prefix
- course-schedule-ii
- course-schedule
- cousins-in-binary-tree
- cracking-the-safe
- critical-connections-in-a-network
- custom-sort-string
- customer-placing-the-largest-number-of-orders
- customers-who-never-order
- daily-temperatures
- day-of-the-week
- day-of-the-year
- decode-string
- decode-ways
- decoded-string-at-index
- deepest-leaves-sum
- defanging-an-ip-address
- degree-of-an-array
- delete-and-earn
- delete-columns-to-make-sorted
- delete-duplicate-emails
- delete-node-in-a-linked-list
- department-highest-salary
- department-top-three-salaries
- design-add-and-search-words-data-structure
- design-hashmap
- design-hashset
- design-linked-list
- design-search-autocomplete-system
- design-snake-game
- design-tic-tac-toe
- design-twitter
- design-underground-system
- detect-capital
- determine-if-string-halves-are-alike
- determine-if-two-strings-are-close
- di-string-match
- diagonal-traverse
- diameter-of-binary-tree
- different-ways-to-add-parentheses
- distance-between-bus-stops
- distribute-candies-to-people
- distribute-candies
- divide-two-integers
- divisor-game
- domino-and-tromino-tiling
- dungeon-game
- duplicate-emails
- duplicate-zeros
- edit-distance
- employee-importance
- employees-earning-more-than-their-managers
- encode-and-decode-strings
- encode-and-decode-tinyurl
- erect-the-fence
- evaluate-division
- evaluate-reverse-polish-notation
- excel-sheet-column-number
- excel-sheet-column-title
- exchange-seats
- exclusive-time-of-functions
- expression-add-operators
- expressive-words
- factorial-trailing-zeroes
- fair-candy-swap
- fibonacci-number
- find-a-corresponding-node-of-a-binary-tree-in-a-clone-of-that-tree
- find-all-anagrams-in-a-string
- find-all-duplicates-in-an-array
- find-all-numbers-disappeared-in-an-array
- find-anagram-mappings
- find-and-replace-in-string
- find-and-replace-pattern
- find-common-characters
- find-customer-referee
- find-duplicate-file-in-system
- find-first-and-last-position-of-element-in-sorted-array
- find-if-path-exists-in-graph
- find-k-closest-elements
- find-median-from-data-stream
- find-minimum-in-rotated-sorted-array
- find-mode-in-binary-search-tree
- find-original-array-from-doubled-array
- find-peak-element
- find-pivot-index
- find-players-with-zero-or-one-losses
- find-smallest-letter-greater-than-target
- find-the-celebrity
- find-the-difference
- find-the-duplicate-number
- find-the-index-of-the-first-occurrence-in-a-string
- find-the-smallest-divisor-given-a-threshold
- find-the-town-judge
- find-words-that-can-be-formed-by-characters
- first-bad-version
- first-missing-positive
- first-unique-character-in-a-string
- first-unique-number
- fixed-point
- fizz-buzz
- flatten-2d-vector
- flatten-a-multilevel-doubly-linked-list
- flatten-binary-tree-to-linked-list
- flatten-nested-list-iterator
- flip-equivalent-binary-trees
- flipping-an-image
- flood-fill
- fraction-to-recurring-decimal
- friends-of-appropriate-ages
- fruit-into-baskets
- furthest-building-you-can-reach
- game-of-life
- game-play-analysis-i
- gas-station
- generate-parentheses
- generate-random-point-in-a-circle
- goat-latin
- gray-code
- greatest-common-divisor-of-strings
- group-anagrams
- group-shifted-strings
- groups-of-special-equivalent-strings
- guess-number-higher-or-lower
- guess-the-word
- h-index-2
- h-index-ii
- h-index
- hamming-distance
- happy-number
- height-checker
- house-robber-ii
- house-robber-iii
- house-robber
- human-traffic-of-stadium
- image-smoother
- implement-queue-using-stacks
- implement-stack-using-queues
- implement-strstr
- implement-trie-prefix-tree
- increasing-order-search-tree
- increasing-subsequences
- increasing-triplet-subsequence
- inorder-successor-in-bst
- insert-delete-getrandom-o1
- insert-interval
- insert-into-a-binary-search-tree
- insert-into-a-sorted-circular-linked-list
- insertion-sort-list
- integer-break
- integer-to-english-words
- integer-to-roman
- interleaving-string
- intersection-of-two-arrays-ii
- intersection-of-two-arrays
- intersection-of-two-linked-lists
- interval-list-intersections
- invert-binary-tree
- is-graph-bipartite
- is-subsequence
- island-perimeter
- isomorphic-strings
- iterator-for-combination
- jewels-and-stones
- judge-route-circle
- jump-game-ii
- jump-game-iii
- jump-game-iv
- jump-game-vi
- jump-game
- k-closest-points-to-origin
- k-diff-pairs-in-an-array
- k-inverse-pairs-array
- k-th-symbol-in-grammar
- keep-multiplying-found-values-by-two
- keyboard-row
- keys-and-rooms
- knight-dialer
- koko-eating-bananas
- kth-largest-element-in-a-stream
- kth-largest-element-in-an-array
- kth-missing-positive-number
- kth-smallest-element-in-a-bst
- kth-smallest-element-in-a-sorted-matrix
- kth-smallest-number-in-multiplication-table
- largest-divisible-subset
- largest-number-at-least-twice-of-others
- largest-number
- largest-perimeter-triangle
- largest-plus-sign
- largest-rectangle-in-histogram
- largest-time-for-given-digits
- largest-triangle-area
- last-stone-weight-ii
- last-stone-weight
- leaf-similar-trees
- leftmost-column-with-at-least-a-one
- lemonade-change
- length-of-last-word
- letter-case-permutation
- letter-combinations-of-a-phone-number
- lfu-cache
- license-key-formatting
- linked-list-cycle-ii
- linked-list-cycle
- linked-list-random-node
- logger-rate-limiter
- logical-or-of-two-binary-grids-represented-as-quad-trees
- long-pressed-name
- longest-absolute-file-path
- longest-arithmetic-subsequence
- longest-common-prefix
- longest-common-subsequence
- longest-consecutive-sequence
- longest-continuous-increasing-subsequence
- longest-duplicate-substring
- longest-harmonious-subsequence
- longest-increasing-path-in-a-matrix
- longest-increasing-subsequence
- longest-palindrome
- longest-palindromic-subsequence
- longest-palindromic-substring
- longest-repeating-character-replacement
- longest-string-chain
- longest-subsequence-with-limited-sum
- longest-substring-with-at-most-k-distinct-characters
- longest-substring-with-at-most-two-distinct-characters
- longest-substring-without-repeating-characters
- longest-uncommon-subsequence-i
- longest-uncommon-subsequence-ii
- longest-univalue-path
- longest-valid-parentheses
- longest-word-in-dictionary-through-deleting
- longest-word-in-dictionary
- lowest-common-ancestor-of-a-binary-search-tree
- lowest-common-ancestor-of-a-binary-tree
  - Solution.py
- lowest-common-ancestor-of-deepest-leaves
- lru-cache
- magic-squares-in-grid
- majority-element-ii
- majority-element
- make-the-string-great
- making-a-large-island
- matchsticks-to-square
- matrix-cells-in-distance-order
- max-area-of-island
- max-consecutive-ones-ii
- max-consecutive-ones-iii
- max-consecutive-ones
- max-number-of-k-sum-pairs
- max-points-on-a-line
- maximal-rectangle
- maximal-square
- maximize-distance-to-closest-person
- maximize-sum-of-array-after-k-negations
- maximum-69-number
- maximum-area-of-a-piece-of-cake-after-horizontal-and-vertical-cuts
- maximum-average-subarray-i
- maximum-bags-with-full-capacity-of-rocks
- maximum-binary-tree
- maximum-depth-of-binary-tree
- maximum-depth-of-n-ary-tree
- maximum-difference-between-node-and-ancestor
- maximum-erasure-value
- maximum-frequency-stack
- maximum-gap
- maximum-number-of-balloons
- maximum-performance-of-a-team
- maximum-product-of-splitted-binary-tree
- maximum-product-of-three-numbers
- maximum-product-of-word-lengths
- maximum-product-subarray
- maximum-profit-in-job-scheduling
- maximum-size-subarray-sum-equals-k
- maximum-subarray
- maximum-sum-circular-subarray
- maximum-swap
- maximum-units-on-a-truck
- maximum-width-of-binary-tree
- maximum-width-ramp
- maximum-xor-of-two-numbers-in-an-array
- median-of-two-sorted-arrays
- meeting-rooms-ii
- meeting-rooms
- merge-intervals
- merge-k-sorted-lists
- merge-sorted-array
- merge-two-binary-trees
- merge-two-sorted-lists
- middle-of-the-linked-list
- min-cost-climbing-stairs
- min-stack
- minimize-deviation-in-array
- minimum-absolute-difference-in-bst
- minimum-absolute-difference
- minimum-add-to-make-parentheses-valid
- minimum-area-rectangle-ii
- minimum-area-rectangle
- minimum-average-difference
- minimum-cost-to-hire-k-workers
- minimum-cost-to-move-chips-to-the-same-position
- minimum-depth-of-binary-tree
- minimum-distance-between-bst-nodes
- minimum-domino-rotations-for-equal-row
- minimum-falling-path-sum
- minimum-genetic-mutation
- minimum-height-trees
- minimum-index-sum-of-two-lists
- minimum-moves-to-equal-array-elements-ii
- minimum-moves-to-equal-array-elements
- minimum-number-of-arrows-to-burst-balloons
- minimum-number-of-refueling-stops
- minimum-operations-to-make-array-equal
- minimum-path-sum
- minimum-remove-to-make-valid-parentheses
- minimum-size-subarray-sum
- minimum-sum-of-four-digit-number-after-splitting-digits
- minimum-swaps-to-make-sequences-increasing
- minimum-time-difference
- minimum-time-to-make-rope-colorful
- minimum-time-visiting-all-points
- minimum-value-to-get-positive-step-by-step-sum
- minimum-window-substring
- mirror-reflection
- missing-number
- missing-ranges
- monotone-increasing-digits
- monotonic-array
- most-common-word
- most-stones-removed-with-same-row-or-column
- move-zeroes
- multiply-strings
- my-calendar-i
- my-calendar-ii
- my-calendar-iii
- n-ary-tree-level-order-traversal
- n-ary-tree-postorder-traversal
- n-ary-tree-preorder-traversal
- n-queens-ii
- n-queens
- n-repeated-element-in-size-2n-array
- n-th-tribonacci-number
- nearest-exit-from-entrance-in-maze
- network-delay-time
- new-21-game
- next-closest-time
- next-greater-element-i
- next-greater-element-ii
- next-greater-element-iii
- next-greater-node-in-linked-list
- next-permutation
- nim-game
- non-decreasing-array
- non-decreasing-subsequences
- non-overlapping-intervals
- not-boring-movies
- nth-highest-salary
- number-complement
- number-of-1-bits
- number-of-boomerangs
- number-of-connected-components-in-an-undirected-graph
- number-of-dice-rolls-with-target-sum
- number-of-digit-one
- number-of-equivalent-domino-pairs
- number-of-islands
- number-of-lines-to-write-string
- number-of-matching-subsequences
- number-of-provinces
- number-of-recent-calls
- number-of-segments-in-a-string
- number-of-steps-to-reduce-a-number-to-zero
- number-of-subarrays-with-bounded-maximum
- number-of-submatrices-that-sum-to-target
- number-of-valid-words-for-each-puzzle
- numbers-with-same-consecutive-differences
- occurrences-after-bigram
- odd-even-jump
- odd-even-linked-list
- one-edit-distance
- ones-and-zeroes
- online-stock-span
- open-the-lock
- orderly-queue
- out-of-boundary-paths
- pacific-atlantic-water-flow
- paint-house-iii
- pairs-of-songs-with-total-durations-divisible-by-60
- palindrome-linked-list
- palindrome-number
- palindrome-pairs
- palindrome-partitioning-ii
- palindrome-partitioning
- palindromic-substrings
- partition-array-into-disjoint-intervals
- partition-array-into-three-parts-with-equal-sum
- partition-equal-subset-sum
- partition-labels
- partition-list
- partitioning-into-minimum-number-of-deci-binary-numbers
- pascals-triangle-ii
- pascals-triangle
- patching-array
- path-sum-ii
- path-sum-iii
- path-sum
- path-with-minimum-effort
- peak-index-in-a-mountain-array
- peeking-iterator
- perfect-number
- perfect-squares
- perform-string-shifts
- permutation-in-string
- permutation-sequence
- permutations-ii
- permutations
- plus-one
- poor-pigs
- populating-next-right-pointers-in-each-node-ii
- populating-next-right-pointers-in-each-node
- positions-of-large-groups
- possible-bipartition
- pow(x,n)
- power-of-four
- power-of-three
- power-of-two
- powerful-integers
- powx-n
- prefix-and-suffix-search
- prime-number-of-set-bits-in-binary-representation
- print-in-order
- product-of-array-except-self
- projection-area-of-3d-shapes
- pseudo-palindromic-paths-in-a-binary-tree
- queue-reconstruction-by-height
- random-pick-index
- random-pick-with-weight
- range-addition-ii
- range-sum-of-bst
- range-sum-query-2d-immutable
- range-sum-query-2d-mutable
- range-sum-query-immutable
- range-sum-query-mutable
- rank-scores
- ransom-note
- read-n-characters-given-read4-ii-call-multiple-times
- read-n-characters-given-read4
- reconstruct-itinerary
- rectangle-area
- rectangle-overlap
- reduce-array-size-to-the-half
- regular-expression-matching
- relative-ranks
- relative-sort-array
- remove-all-adjacent-duplicates-in-string-ii
- remove-all-adjacent-duplicates-in-string
- remove-covered-intervals
- remove-duplicate-letters
- remove-duplicates-from-sorted-array-ii
- remove-duplicates-from-sorted-array
- remove-duplicates-from-sorted-list-ii
- remove-duplicates-from-sorted-list
- remove-element
- remove-invalid-parentheses
- remove-k-digits
- remove-linked-list-elements
- remove-nth-node-from-end-of-list
- remove-outermost-parentheses
- remove-palindromic-subsequences
- remove-stones-to-minimize-the-total
- reorder-list
- reorganize-string
- repeated-dna-sequences
- repeated-string-match
- repeated-substring-pattern
- reshape-the-matrix
- restore-ip-addresses
- reverse-bits
- reverse-integer
- reverse-linked-list-ii
- reverse-linked-list
- reverse-nodes-in-k-group
- reverse-only-letters
- reverse-string-ii
- reverse-string
- reverse-vowels-of-a-string
- reverse-words-in-a-string-iii
- reverse-words-in-a-string
- rising-temperature
- rle-iterator
- robot-return-to-origin
- robot-room-cleaner
- roman-to-integer
- rotate-array
- rotate-image
- rotate-list
- rotate-string
- rotated-digits
- running-sum-of-1d-array
- russian-doll-envelopes
- sales-analysis-iii
- sales-person
- same-tree
- score-of-parentheses
- search-a-2d-matrix-ii
- search-a-2d-matrix
- search-in-a-binary-search-tree
- search-in-rotated-sorted-array-ii
- search-in-rotated-sorted-array
- search-insert-position
- search-suggestions-system
- second-highest-salary
- second-minimum-node-in-a-binary-tree
- self-dividing-numbers
- sentence-similarity
- serialize-and-deserialize-binary-tree
- serialize-and-deserialize-bst
- set-matrix-zeroes
- set-mismatch
- shift-2d-grid
- shifting-letters
- short-encoding-of-words
- shortest-completing-word
- shortest-distance-from-all-buildings
- shortest-distance-to-a-character
- shortest-path-in-binary-matrix
- shortest-path-visiting-all-nodes
- shortest-unsorted-continuous-subarray
- shortest-way-to-form-string
- shuffle-an-array
- simplify-path
- single-element-in-a-sorted-array
- single-number-ii
- single-number-iii
- single-number
- single-threaded-cpu
- sliding-window-maximum
- slowest-key
- smallest-integer-divisible-by-k
- smallest-range-i
- smallest-string-with-a-given-numeric-value
- smallest-string-with-swaps
- smallest-subsequence-of-distinct-characters
- smallest-subtree-with-all-the-deepest-nodes
- sort-array-by-parity-ii
- sort-array-by-parity
- sort-characters-by-frequency
- sort-colors
- sort-even-and-odd-indices-independently
- sort-list
- sparse-matrix-multiplication
- spiral-matrix-ii
- spiral-matrix-iii
- spiral-matrix
- split-a-string-in-balanced-strings
- split-array-largest-sum
- split-linked-list-in-parts
- sqrtx
- squares-of-a-sorted-array
- stone-game-iv
- stone-game-vii
- stone-game
- stream-of-characters
- string-compression
- string-to-integer-atoi
- string-to-integer
- strobogrammatic-number-ii
- strobogrammatic-number
- student-attendance-record-i
- subarray-sum-equals-k
- subdomain-visit-count
- subsets-ii
- subsets
- subtree-of-another-tree
- sudoku-solver
- sum-of-distances-in-tree
- sum-of-even-numbers-after-queries
- sum-of-left-leaves
- sum-of-root-to-leaf-binary-numbers
- sum-of-square-numbers
- sum-of-subarray-minimums
- sum-of-two-integers
- sum-root-to-leaf-numbers
- summary-ranges
- super-ugly-number
- surface-area-of-3d-shapes
- surrounded-regions
- swap-adjacent-in-lr-string
- swap-nodes-in-pairs
- swap-salary
- swapping-nodes-in-a-linked-list
- symmetric-tree
- target-sum
- task-scheduler
- teemo-attacking
- tenth-line
- the-k-weakest-rows-in-a-matrix
- the-kth-factor-of-n
- the-number-of-weak-characters-in-the-game
- the-skyline-problem
- third-maximum-number
- time-based-key-value-store
- to-lower-case
- toeplitz-matrix
- top-k-frequent-elements
- top-k-frequent-words
- total-hamming-distance
- transpose-file
- transpose-matrix
- trapping-rain-water
- triangle
- trim-a-binary-search-tree
- trips-and-users
- two-city-scheduling
- two-sum-ii-input-array-is-sorted
- two-sum-iv-input-is-a-bst
- two-sum
- ugly-number-ii
- ugly-number
- uncommon-words-from-two-sentences
- uncrossed-lines
- unique-binary-search-trees-ii
- unique-binary-search-trees
- unique-email-addresses
- unique-morse-code-words
- unique-number-of-occurrences
- unique-paths-ii
- unique-paths-iii
- unique-paths
- univalued-binary-tree
- user-activity-for-the-past-30-days-i
- utf-8-validation
- valid-anagram
- valid-boomerang
- valid-mountain-array
- valid-number
- valid-palindrome-ii
- valid-palindrome
- valid-parentheses
- valid-parenthesis-string
- valid-perfect-square
- valid-phone-numbers
- valid-sudoku
- valid-triangle-number
- valid-word-abbreviation
- valid-word-square
- validate-binary-search-tree
- validate-ip-address
- validate-stack-sequences
- verify-preorder-serialization-of-a-binary-tree
- verifying-an-alien-dictionary
- vertical-order-traversal-of-a-binary-tree
- vowel-spellchecker
- walking-robot-simulation
- walls-and-gates
- where-will-the-ball-fall
- wiggle-sort-ii
- wiggle-subsequence
- wildcard-matching
- word-abbreviation
- word-break-ii
- word-break
- word-frequency
- word-ladder-ii
- word-ladder
- word-pattern
- word-search-ii
- word-search
- word-squares
- word-subsets
- x-of-a-kind-in-a-deck-of-cards
- zigzag-conversion
.gitignore
.travis.yml
LICENSE
README.md
download_solutions.py
test_requirements.txt
validate_solutions.py

lowest-common-ancestor-of-a-binary-tree

Jan 30, 2021

5e3dd2a · Jan 30, 2021

Name	Name	Last commit message	Last commit date
parent directory ..
Solution.py	Solution.py	feat: restructure solution structure	Jan 30, 2021

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