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leetcode

This is the repository for keeping the track of all the leetcode submissions i make

Array

0049-group-anagrams
0056-merge-intervals
0059-spiral-matrix-ii
0502-ipo
0853-most-profit-assigning-work
0901-advantage-shuffle
0982-minimum-increment-to-make-array-unique
1016-subarray-sums-divisible-by-k
1137-height-checker
1138-grumpy-bookstore-owner
1217-relative-sort-array
2148-minimum-number-of-moves-to-seat-everyone
2392-successful-pairs-of-spells-and-potions
3461-find-the-minimum-area-to-cover-all-ones-i

Sorting

0049-group-anagrams
0056-merge-intervals
0502-ipo
0853-most-profit-assigning-work
0901-advantage-shuffle
0982-minimum-increment-to-make-array-unique
1137-height-checker
1217-relative-sort-array
2148-minimum-number-of-moves-to-seat-everyone
2392-successful-pairs-of-spells-and-potions

Two Pointers

0344-reverse-string
0633-sum-of-square-numbers
0853-most-profit-assigning-work
0901-advantage-shuffle
2216-delete-the-middle-node-of-a-linked-list
2392-successful-pairs-of-spells-and-potions
2572-append-characters-to-string-to-make-subsequence

String

0049-group-anagrams
0344-reverse-string
0409-longest-palindrome
2572-append-characters-to-string-to-make-subsequence

Greedy

0409-longest-palindrome
0502-ipo
0853-most-profit-assigning-work
0901-advantage-shuffle
0982-minimum-increment-to-make-array-unique
2148-minimum-number-of-moves-to-seat-everyone
2572-append-characters-to-string-to-make-subsequence

Hash Table

0049-group-anagrams
0409-longest-palindrome
1016-subarray-sums-divisible-by-k
1217-relative-sort-array

Linked List

0114-flatten-binary-tree-to-linked-list
0116-populating-next-right-pointers-in-each-node
2216-delete-the-middle-node-of-a-linked-list

Binary Search

0367-valid-perfect-square
0633-sum-of-square-numbers
0853-most-profit-assigning-work
2392-successful-pairs-of-spells-and-potions

Prefix Sum

1016-subarray-sums-divisible-by-k

Counting Sort

0982-minimum-increment-to-make-array-unique
1137-height-checker
1217-relative-sort-array

Tree

0102-binary-tree-level-order-traversal
0103-binary-tree-zigzag-level-order-traversal
0107-binary-tree-level-order-traversal-ii
0114-flatten-binary-tree-to-linked-list
0116-populating-next-right-pointers-in-each-node
0199-binary-tree-right-side-view
0783-search-in-a-binary-search-tree
1116-maximum-level-sum-of-a-binary-tree

Breadth-First Search

0102-binary-tree-level-order-traversal
0103-binary-tree-zigzag-level-order-traversal
0107-binary-tree-level-order-traversal-ii
0116-populating-next-right-pointers-in-each-node
0199-binary-tree-right-side-view
1116-maximum-level-sum-of-a-binary-tree

Binary Tree

0102-binary-tree-level-order-traversal
0103-binary-tree-zigzag-level-order-traversal
0107-binary-tree-level-order-traversal-ii
0114-flatten-binary-tree-to-linked-list
0116-populating-next-right-pointers-in-each-node
0199-binary-tree-right-side-view
0783-search-in-a-binary-search-tree
1116-maximum-level-sum-of-a-binary-tree

Depth-First Search

0114-flatten-binary-tree-to-linked-list
0116-populating-next-right-pointers-in-each-node
0199-binary-tree-right-side-view
1116-maximum-level-sum-of-a-binary-tree

Math

0367-valid-perfect-square
0633-sum-of-square-numbers

Heap (Priority Queue)

0502-ipo

Stack

0114-flatten-binary-tree-to-linked-list

Sliding Window

1138-grumpy-bookstore-owner

Binary Search Tree

0783-search-in-a-binary-search-tree

Matrix

0059-spiral-matrix-ii
3461-find-the-minimum-area-to-cover-all-ones-i

Simulation

0059-spiral-matrix-ii

Graph

1916-find-center-of-star-graph

LeetCode Topics

Array

0039-combination-sum
0040-combination-sum-ii
0046-permutations
0053-maximum-subarray
0057-insert-interval
0073-set-matrix-zeroes
0078-subsets
0079-word-search
0090-subsets-ii
0118-pascals-triangle
0128-longest-consecutive-sequence
0136-single-number
0137-single-number-ii
0179-largest-number
0189-rotate-array
0198-house-robber
0213-house-robber-ii
0350-intersection-of-two-arrays-ii
0624-maximum-distance-in-arrays
0735-asteroid-collision
0870-magic-squares-in-grid
0890-lemonade-change
0948-sort-an-array
1002-maximum-width-ramp
1293-three-consecutive-odds
1355-minimum-deletions-to-make-array-beautiful
1364-tuple-with-same-product
1407-group-the-people-given-the-group-size-they-belong-to
1421-find-numbers-with-even-number-of-digits
1435-xor-queries-of-a-subarray
1477-product-of-the-last-k-numbers
1496-lucky-numbers-in-a-matrix
1497-design-a-stack-with-increment-operation
1511-count-number-of-teams
1524-string-matching-in-an-array
1552-build-an-array-with-stack-operations
1556-make-two-arrays-equal-by-reversing-subarrays
1570-final-prices-with-a-special-discount-in-a-shop
1582-design-browser-history
1616-minimum-difference-between-largest-and-smallest-value-in-three-moves
1651-shuffle-string
1711-find-valid-matrix-given-row-and-column-sums
1720-crawler-log-folder
1741-sort-array-by-increasing-frequency
1786-count-the-number-of-consistent-strings
1803-average-waiting-time
1849-maximum-absolute-sum-of-any-subarray
1878-check-if-array-is-sorted-and-rotated
1895-minimum-number-of-operations-to-move-all-balls-to-each-box
1927-maximum-ascending-subarray-sum
1951-find-the-winner-of-the-circular-game
1972-rotating-the-box
1993-sum-of-all-subset-xor-totals
1995-finding-pairs-with-a-certain-sum
2006-find-the-student-that-will-replace-the-chalk
2132-convert-1d-array-into-2d-array
2155-find-missing-observations
2163-kth-distinct-string-in-an-array
2170-count-number-of-maximum-bitwise-or-subsets
2179-most-beautiful-item-for-each-query
2232-adding-spaces-to-a-string
2255-minimum-swaps-to-group-all-1s-together-ii
2265-partition-array-according-to-given-pivot
2292-counting-words-with-a-given-prefix
2306-create-binary-tree-from-descriptions
2308-divide-array-into-equal-pairs
2358-number-of-ways-to-split-array
2411-spiral-matrix-iv
2473-max-sum-of-a-pair-with-equal-sum-of-digits
2497-maximum-matching-of-players-with-trainers
2502-sort-the-people
2503-longest-subarray-with-maximum-bitwise-and
2519-find-the-original-array-of-prefix-xor
2614-maximum-count-of-positive-integer-and-negative-integer
2616-maximal-score-after-applying-k-operations
2691-count-vowel-strings-in-ranges
2707-merge-two-2d-arrays-by-summing-values
2727-number-of-senior-citizens
2766-find-the-prefix-common-array-of-two-arrays
2792-neighboring-bitwise-xor
2846-robot-collisions
3152-maximum-value-of-an-ordered-triplet-ii
3154-maximum-value-of-an-ordered-triplet-i
3194-find-words-containing-character
3227-find-missing-and-repeated-values
3309-count-prefix-and-suffix-pairs-i
3372-longest-strictly-increasing-or-strictly-decreasing-subarray
3420-find-occurrences-of-an-element-in-an-array
3429-special-array-i
3501-delete-nodes-from-linked-list-present-in-array
3522-find-the-power-of-k-size-subarrays-i
3685-count-subarrays-of-length-three-with-a-condition
3747-maximum-difference-between-adjacent-elements-in-a-circular-array

Hash Table

0012-integer-to-roman
0073-set-matrix-zeroes
0128-longest-consecutive-sequence
0350-intersection-of-two-arrays-ii
0692-top-k-frequent-words
0870-magic-squares-in-grid
0920-uncommon-words-from-two-sentences
1160-letter-tile-possibilities
1364-tuple-with-same-product
1407-group-the-people-given-the-group-size-they-belong-to
1460-number-of-substrings-containing-all-three-characters
1556-make-two-arrays-equal-by-reversing-subarrays
1741-sort-array-by-increasing-frequency
1786-count-the-number-of-consistent-strings
1915-check-if-one-string-swap-can-make-strings-equal
1995-finding-pairs-with-a-certain-sum
2059-unique-length-3-palindromic-subsequences
2163-kth-distinct-string-in-an-array
2306-create-binary-tree-from-descriptions
2308-divide-array-into-equal-pairs
2473-max-sum-of-a-pair-with-equal-sum-of-digits
2502-sort-the-people
2707-merge-two-2d-arrays-by-summing-values
2766-find-the-prefix-common-array-of-two-arrays
3227-find-missing-and-repeated-values
3276-minimum-number-of-pushes-to-type-word-ii
3420-find-occurrences-of-an-element-in-an-array
3455-minimum-length-of-string-after-operations
3501-delete-nodes-from-linked-list-present-in-array
3872-find-most-frequent-vowel-and-consonant

Matrix

0073-set-matrix-zeroes
0079-word-search
0870-magic-squares-in-grid
1496-lucky-numbers-in-a-matrix
1711-find-valid-matrix-given-row-and-column-sums
1972-rotating-the-box
2132-convert-1d-array-into-2d-array
2411-spiral-matrix-iv
3227-find-missing-and-repeated-values

Two Pointers

0143-reorder-list
0189-rotate-array
0350-intersection-of-two-arrays-ii
0647-palindromic-substrings
1566-check-if-a-word-occurs-as-a-prefix-of-any-word-in-a-sentence
1972-rotating-the-box
2232-adding-spaces-to-a-string
2265-partition-array-according-to-given-pivot
2497-maximum-matching-of-players-with-trainers
2707-merge-two-2d-arrays-by-summing-values

Binary Search

0350-intersection-of-two-arrays-ii
2006-find-the-student-that-will-replace-the-chalk
2179-most-beautiful-item-for-each-query
2614-maximum-count-of-positive-integer-and-negative-integer

Sorting

0179-largest-number
0350-intersection-of-two-arrays-ii
0692-top-k-frequent-words
0948-sort-an-array
1556-make-two-arrays-equal-by-reversing-subarrays
1616-minimum-difference-between-largest-and-smallest-value-in-three-moves
1741-sort-array-by-increasing-frequency
2179-most-beautiful-item-for-each-query
2473-max-sum-of-a-pair-with-equal-sum-of-digits
2497-maximum-matching-of-players-with-trainers
2502-sort-the-people
2646-kth-largest-sum-in-a-binary-tree
2846-robot-collisions
3276-minimum-number-of-pushes-to-type-word-ii

Greedy

0179-largest-number
0624-maximum-distance-in-arrays
0670-maximum-swap
0890-lemonade-change
0957-minimum-add-to-make-parentheses-valid
1355-minimum-deletions-to-make-array-beautiful
1616-minimum-difference-between-largest-and-smallest-value-in-three-moves
1711-find-valid-matrix-given-row-and-column-sums
1818-maximum-score-from-removing-substrings
2497-maximum-matching-of-players-with-trainers
2616-maximal-score-after-applying-k-operations
3275-minimum-number-of-pushes-to-type-word-i
3276-minimum-number-of-pushes-to-type-word-ii

Linked List

0143-reorder-list
0725-split-linked-list-in-parts
1582-design-browser-history
2182-find-the-minimum-and-maximum-number-of-nodes-between-critical-points
2299-merge-nodes-in-between-zeros
2411-spiral-matrix-iv
2903-insert-greatest-common-divisors-in-linked-list
3501-delete-nodes-from-linked-list-present-in-array

Simulation

0592-fraction-addition-and-subtraction
0735-asteroid-collision
1552-build-an-array-with-stack-operations
1642-water-bottles
1803-average-waiting-time
1951-find-the-winner-of-the-circular-game
2006-find-the-student-that-will-replace-the-chalk
2021-remove-all-occurrences-of-a-substring
2076-sum-of-digits-of-string-after-convert
2132-convert-1d-array-into-2d-array
2155-find-missing-observations
2232-adding-spaces-to-a-string
2265-partition-array-according-to-given-pivot
2299-merge-nodes-in-between-zeros
2411-spiral-matrix-iv
2645-pass-the-pillow
2800-minimum-string-length-after-removing-substrings
2846-robot-collisions
3447-clear-digits
3566-find-the-sequence-of-strings-appeared-on-the-screen

Database

0197-rising-temperature
1153-product-sales-analysis-i
1724-customer-who-visited-but-did-not-make-any-transactions

Math

0012-integer-to-roman
0050-powx-n
0189-rotate-array
0273-integer-to-english-words
0592-fraction-addition-and-subtraction
0593-valid-square
0670-maximum-swap
0870-magic-squares-in-grid
1421-find-numbers-with-even-number-of-digits
1477-product-of-the-last-k-numbers
1642-water-bottles
1889-check-if-number-is-a-sum-of-powers-of-three
1951-find-the-winner-of-the-circular-game
1993-sum-of-all-subset-xor-totals
2155-find-missing-observations
2645-pass-the-pillow
2649-count-total-number-of-colored-cells
2903-insert-greatest-common-divisors-in-linked-list
3227-find-missing-and-repeated-values
3275-minimum-number-of-pushes-to-type-word-i

Geometry

0593-valid-square

Backtracking

0039-combination-sum
0040-combination-sum-ii
0046-permutations
0077-combinations
0078-subsets
0079-word-search
0090-subsets-ii
1160-letter-tile-possibilities
1516-the-k-th-lexicographical-string-of-all-happy-strings-of-length-n
1993-sum-of-all-subset-xor-totals
2170-count-number-of-maximum-bitwise-or-subsets

Bit Manipulation

0078-subsets
0090-subsets-ii
0136-single-number
0137-single-number-ii
0191-number-of-1-bits
0476-number-complement
1435-xor-queries-of-a-subarray
1786-count-the-number-of-consistent-strings
1993-sum-of-all-subset-xor-totals
2059-unique-length-3-palindromic-subsequences
2170-count-number-of-maximum-bitwise-or-subsets
2308-divide-array-into-equal-pairs
2323-minimum-bit-flips-to-convert-number
2503-longest-subarray-with-maximum-bitwise-and
2519-find-the-original-array-of-prefix-xor
2766-find-the-prefix-common-array-of-two-arrays
2792-neighboring-bitwise-xor
3453-generate-binary-strings-without-adjacent-zeros

Recursion

0050-powx-n
0143-reorder-list
0273-integer-to-english-words
1951-find-the-winner-of-the-circular-game
3453-generate-binary-strings-without-adjacent-zeros

Queue

1951-find-the-winner-of-the-circular-game

String

0012-integer-to-roman
0079-word-search
0179-largest-number
0273-integer-to-english-words
0592-fraction-addition-and-subtraction
0647-palindromic-substrings
0692-top-k-frequent-words
0812-rotate-string
0920-uncommon-words-from-two-sentences
0957-minimum-add-to-make-parentheses-valid
1160-letter-tile-possibilities
1298-reverse-substrings-between-each-pair-of-parentheses
1460-number-of-substrings-containing-all-three-characters
1516-the-k-th-lexicographical-string-of-all-happy-strings-of-length-n
1524-string-matching-in-an-array
1537-maximum-score-after-splitting-a-string
1566-check-if-a-word-occurs-as-a-prefix-of-any-word-in-a-sentence
1651-shuffle-string
1720-crawler-log-folder
1756-minimum-deletions-to-make-string-balanced
1786-count-the-number-of-consistent-strings
1818-maximum-score-from-removing-substrings
1895-minimum-number-of-operations-to-move-all-balls-to-each-box
1915-check-if-one-string-swap-can-make-strings-equal
2021-remove-all-occurrences-of-a-substring
2059-unique-length-3-palindromic-subsequences
2076-sum-of-digits-of-string-after-convert
2163-kth-distinct-string-in-an-array
2232-adding-spaces-to-a-string
2292-counting-words-with-a-given-prefix
2502-sort-the-people
2691-count-vowel-strings-in-ranges
2727-number-of-senior-citizens
2800-minimum-string-length-after-removing-substrings
3174-minimum-number-of-changes-to-make-binary-string-beautiful
3194-find-words-containing-character
3275-minimum-number-of-pushes-to-type-word-i
3276-minimum-number-of-pushes-to-type-word-ii
3309-count-prefix-and-suffix-pairs-i
3447-clear-digits
3451-string-compression-iii
3453-generate-binary-strings-without-adjacent-zeros
3455-minimum-length-of-string-after-operations
3566-find-the-sequence-of-strings-appeared-on-the-screen
3636-check-balanced-string
3872-find-most-frequent-vowel-and-consonant

Stack

0143-reorder-list
0145-binary-tree-postorder-traversal
0735-asteroid-collision
0776-n-ary-tree-postorder-traversal
0957-minimum-add-to-make-parentheses-valid
1002-maximum-width-ramp
1298-reverse-substrings-between-each-pair-of-parentheses
1355-minimum-deletions-to-make-array-beautiful
1497-design-a-stack-with-increment-operation
1552-build-an-array-with-stack-operations
1570-final-prices-with-a-special-discount-in-a-shop
1582-design-browser-history
1720-crawler-log-folder
1756-minimum-deletions-to-make-string-balanced
1818-maximum-score-from-removing-substrings
2021-remove-all-occurrences-of-a-substring
2800-minimum-string-length-after-removing-substrings
2846-robot-collisions
3447-clear-digits

Tree

0098-validate-binary-search-tree
0104-maximum-depth-of-binary-tree
0145-binary-tree-postorder-traversal
0226-invert-binary-tree
0230-kth-smallest-element-in-a-bst
0235-lowest-common-ancestor-of-a-binary-search-tree
0236-lowest-common-ancestor-of-a-binary-tree
0513-find-bottom-left-tree-value
0515-find-largest-value-in-each-tree-row
0776-n-ary-tree-postorder-traversal
0789-kth-largest-element-in-a-stream
0988-flip-equivalent-binary-trees
1114-binary-search-tree-to-greater-sum-tree
1243-sum-of-nodes-with-even-valued-grandparent
1254-deepest-leaves-sum
1450-delete-leaves-with-a-given-value
2306-create-binary-tree-from-descriptions
2347-count-nodes-equal-to-average-of-subtree
2493-reverse-odd-levels-of-binary-tree
2646-kth-largest-sum-in-a-binary-tree

Depth-First Search

0098-validate-binary-search-tree
0104-maximum-depth-of-binary-tree
0145-binary-tree-postorder-traversal
0226-invert-binary-tree
0230-kth-smallest-element-in-a-bst
0235-lowest-common-ancestor-of-a-binary-search-tree
0236-lowest-common-ancestor-of-a-binary-tree
0513-find-bottom-left-tree-value
0515-find-largest-value-in-each-tree-row
0776-n-ary-tree-postorder-traversal
0988-flip-equivalent-binary-trees
1114-binary-search-tree-to-greater-sum-tree
1243-sum-of-nodes-with-even-valued-grandparent
1254-deepest-leaves-sum
1450-delete-leaves-with-a-given-value
2347-count-nodes-equal-to-average-of-subtree
2493-reverse-odd-levels-of-binary-tree

Breadth-First Search

0104-maximum-depth-of-binary-tree
0226-invert-binary-tree
0513-find-bottom-left-tree-value
0515-find-largest-value-in-each-tree-row
1243-sum-of-nodes-with-even-valued-grandparent
1254-deepest-leaves-sum
2493-reverse-odd-levels-of-binary-tree
2646-kth-largest-sum-in-a-binary-tree

Binary Tree

0098-validate-binary-search-tree
0104-maximum-depth-of-binary-tree
0145-binary-tree-postorder-traversal
0226-invert-binary-tree
0230-kth-smallest-element-in-a-bst
0235-lowest-common-ancestor-of-a-binary-search-tree
0236-lowest-common-ancestor-of-a-binary-tree
0513-find-bottom-left-tree-value
0515-find-largest-value-in-each-tree-row
0789-kth-largest-element-in-a-stream
0988-flip-equivalent-binary-trees
1114-binary-search-tree-to-greater-sum-tree
1243-sum-of-nodes-with-even-valued-grandparent
1254-deepest-leaves-sum
1450-delete-leaves-with-a-given-value
2306-create-binary-tree-from-descriptions
2347-count-nodes-equal-to-average-of-subtree
2493-reverse-odd-levels-of-binary-tree
2646-kth-largest-sum-in-a-binary-tree

Binary Search Tree

0098-validate-binary-search-tree
0230-kth-smallest-element-in-a-bst
0235-lowest-common-ancestor-of-a-binary-search-tree
0789-kth-largest-element-in-a-stream
1114-binary-search-tree-to-greater-sum-tree

Dynamic Programming

0053-maximum-subarray
0118-pascals-triangle
0198-house-robber
0213-house-robber-ii
0647-palindromic-substrings
1511-count-number-of-teams
1756-minimum-deletions-to-make-string-balanced
1849-maximum-absolute-sum-of-any-subarray

Union Find

0128-longest-consecutive-sequence

Divide and Conquer

0053-maximum-subarray
0191-number-of-1-bits
0948-sort-an-array

Heap (Priority Queue)

0692-top-k-frequent-words
0789-kth-largest-element-in-a-stream
0948-sort-an-array
2473-max-sum-of-a-pair-with-equal-sum-of-digits
2616-maximal-score-after-applying-k-operations

Merge Sort

0948-sort-an-array

Bucket Sort

0692-top-k-frequent-words
0948-sort-an-array

Radix Sort

0948-sort-an-array

Counting Sort

0692-top-k-frequent-words
0920-uncommon-words-from-two-sentences
0948-sort-an-array
1160-letter-tile-possibilities
1364-tuple-with-same-product
1786-count-the-number-of-consistent-strings
1915-check-if-one-string-swap-can-make-strings-equal
2163-kth-distinct-string-in-an-array
2308-divide-array-into-equal-pairs
2614-maximum-count-of-positive-integer-and-negative-integer
3276-minimum-number-of-pushes-to-type-word-ii
3455-minimum-length-of-string-after-operations
3872-find-most-frequent-vowel-and-consonant

Binary Indexed Tree

1511-count-number-of-teams

Sliding Window

1460-number-of-substrings-containing-all-three-characters
2255-minimum-swaps-to-group-all-1s-together-ii
3522-find-the-power-of-k-size-subarrays-i

Design

0789-kth-largest-element-in-a-stream
1477-product-of-the-last-k-numbers
1497-design-a-stack-with-increment-operation
1582-design-browser-history
1995-finding-pairs-with-a-certain-sum

Data Stream

0789-kth-largest-element-in-a-stream
1477-product-of-the-last-k-numbers
1582-design-browser-history

Prefix Sum

1435-xor-queries-of-a-subarray
1477-product-of-the-last-k-numbers
1537-maximum-score-after-splitting-a-string
1895-minimum-number-of-operations-to-move-all-balls-to-each-box
2006-find-the-student-that-will-replace-the-chalk
2059-unique-length-3-palindromic-subsequences
2358-number-of-ways-to-split-array
2691-count-vowel-strings-in-ranges

Number Theory

2903-insert-greatest-common-divisors-in-linked-list

Brainteaser

2503-longest-subarray-with-maximum-bitwise-and

Monotonic Stack

1002-maximum-width-ramp
1570-final-prices-with-a-special-discount-in-a-shop

Trie

0692-top-k-frequent-words
3309-count-prefix-and-suffix-pairs-i

String Matching

0812-rotate-string
1524-string-matching-in-an-array
1566-check-if-a-word-occurs-as-a-prefix-of-any-word-in-a-sentence
2292-counting-words-with-a-given-prefix
3309-count-prefix-and-suffix-pairs-i

Enumeration

1993-sum-of-all-subset-xor-totals
2170-count-number-of-maximum-bitwise-or-subsets

Graph

3189-find-champion-ii

Doubly-Linked List

1582-design-browser-history

Rolling Hash

3309-count-prefix-and-suffix-pairs-i

Hash Function

3309-count-prefix-and-suffix-pairs-i

Combinatorics

1993-sum-of-all-subset-xor-totals

About

This is the repository for keeping the track of all the leetcode submissions i make

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