Leetcode

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

Array

0330-patching-array
0502-ipo

Greedy

0330-patching-array
0502-ipo

Sorting

0502-ipo

Heap (Priority Queue)

0023-merge-k-sorted-lists
0502-ipo

Linked List

0002-add-two-numbers
0019-remove-nth-node-from-end-of-list
0021-merge-two-sorted-lists
0023-merge-k-sorted-lists
0024-swap-nodes-in-pairs
0061-rotate-list
0082-remove-duplicates-from-sorted-list-ii
0083-remove-duplicates-from-sorted-list

Math

0002-add-two-numbers

Recursion

0002-add-two-numbers
0021-merge-two-sorted-lists
0024-swap-nodes-in-pairs

Two Pointers

0019-remove-nth-node-from-end-of-list
0061-rotate-list
0082-remove-duplicates-from-sorted-list-ii

Divide and Conquer

0023-merge-k-sorted-lists

Merge Sort

0023-merge-k-sorted-lists

LeetCode Topics

Array

0901-advantage-shuffle
1207-delete-nodes-and-return-forest
1293-three-consecutive-odds
1333-sort-the-jumbled-numbers
1496-lucky-numbers-in-a-matrix
1556-make-two-arrays-equal-by-reversing-subarrays
1616-minimum-difference-between-largest-and-smallest-value-in-three-moves
1711-find-valid-matrix-given-row-and-column-sums
1720-crawler-log-folder
1741-sort-array-by-increasing-frequency
1951-find-the-winner-of-the-circular-game
2022-maximum-alternating-subsequence-sum
2163-kth-distinct-string-in-an-array
2306-create-binary-tree-from-descriptions
2472-build-a-matrix-with-conditions
2476-check-distances-between-same-letters
2502-sort-the-people
3269-number-of-subarrays-that-match-a-pattern-i
3335-minimum-operations-to-write-the-letter-y-on-a-grid

Math

1307-ugly-number-iii
1885-count-number-of-homogenous-substrings
1951-find-the-winner-of-the-circular-game
3275-minimum-number-of-pushes-to-type-word-i

Recursion

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

Queue

0225-implement-stack-using-queues
1951-find-the-winner-of-the-circular-game

Simulation

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

String

1298-reverse-substrings-between-each-pair-of-parentheses
1720-crawler-log-folder
1818-maximum-score-from-removing-substrings
1885-count-number-of-homogenous-substrings
2163-kth-distinct-string-in-an-array
2217-step-by-step-directions-from-a-binary-tree-node-to-another
2476-check-distances-between-same-letters
2502-sort-the-people
3275-minimum-number-of-pushes-to-type-word-i
3276-minimum-number-of-pushes-to-type-word-ii

Tree

0789-kth-largest-element-in-a-stream
1207-delete-nodes-and-return-forest
1653-number-of-good-leaf-nodes-pairs
2217-step-by-step-directions-from-a-binary-tree-node-to-another
2306-create-binary-tree-from-descriptions

Depth-First Search

0207-course-schedule
1207-delete-nodes-and-return-forest
1653-number-of-good-leaf-nodes-pairs
2217-step-by-step-directions-from-a-binary-tree-node-to-another

Binary Tree

0789-kth-largest-element-in-a-stream
1207-delete-nodes-and-return-forest
1653-number-of-good-leaf-nodes-pairs
2217-step-by-step-directions-from-a-binary-tree-node-to-another
2306-create-binary-tree-from-descriptions

Greedy

0901-advantage-shuffle
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
3275-minimum-number-of-pushes-to-type-word-i
3276-minimum-number-of-pushes-to-type-word-ii

Sorting

0901-advantage-shuffle
1333-sort-the-jumbled-numbers
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
2502-sort-the-people
3276-minimum-number-of-pushes-to-type-word-ii

Hash Table

1207-delete-nodes-and-return-forest
1556-make-two-arrays-equal-by-reversing-subarrays
1741-sort-array-by-increasing-frequency
2163-kth-distinct-string-in-an-array
2306-create-binary-tree-from-descriptions
2476-check-distances-between-same-letters
2502-sort-the-people
3276-minimum-number-of-pushes-to-type-word-ii
3335-minimum-operations-to-write-the-letter-y-on-a-grid

Dynamic Programming

2022-maximum-alternating-subsequence-sum

Matrix

1496-lucky-numbers-in-a-matrix
1711-find-valid-matrix-given-row-and-column-sums
2472-build-a-matrix-with-conditions
3335-minimum-operations-to-write-the-letter-y-on-a-grid

Graph

0207-course-schedule
2472-build-a-matrix-with-conditions

Topological Sort

0207-course-schedule
2472-build-a-matrix-with-conditions

Stack

0225-implement-stack-using-queues
1298-reverse-substrings-between-each-pair-of-parentheses
1720-crawler-log-folder
1818-maximum-score-from-removing-substrings

Binary Search

1307-ugly-number-iii

Combinatorics

1307-ugly-number-iii

Number Theory

1307-ugly-number-iii

Counting

2163-kth-distinct-string-in-an-array
3276-minimum-number-of-pushes-to-type-word-ii
3335-minimum-operations-to-write-the-letter-y-on-a-grid

Two Pointers

0901-advantage-shuffle

Rolling Hash

3269-number-of-subarrays-that-match-a-pattern-i

String Matching

3269-number-of-subarrays-that-match-a-pattern-i

Hash Function

3269-number-of-subarrays-that-match-a-pattern-i

Design

0225-implement-stack-using-queues
0789-kth-largest-element-in-a-stream

Breadth-First Search

0207-course-schedule

Binary Search Tree

0789-kth-largest-element-in-a-stream

Heap (Priority Queue)

0789-kth-largest-element-in-a-stream

Data Stream

0789-kth-largest-element-in-a-stream