Leetcode

Leetcode practice

LeetCode Topics

Array

0001-two-sum
0004-median-of-two-sorted-arrays
0011-container-with-most-water
0014-longest-common-prefix
0026-remove-duplicates-from-sorted-array
0027-remove-element
0035-search-insert-position
0066-plus-one
0088-merge-sorted-array
0121-best-time-to-buy-and-sell-stock
0189-rotate-array
0204-count-primes
0215-kth-largest-element-in-an-array
0217-contains-duplicate
0605-can-place-flowers
0621-task-scheduler
0744-find-smallest-letter-greater-than-target
1014-k-closest-points-to-origin
1018-largest-perimeter-triangle
1127-last-stone-weight
1372-check-if-it-is-a-good-array
1929-concatenation-of-array

Two Pointers

0011-container-with-most-water
0019-remove-nth-node-from-end-of-list
0026-remove-duplicates-from-sorted-array
0027-remove-element
0088-merge-sorted-array
0189-rotate-array

Hash Table

0001-two-sum
0003-longest-substring-without-repeating-characters
0013-roman-to-integer
0146-lru-cache
0217-contains-duplicate
0621-task-scheduler

Linked List

0002-add-two-numbers
0019-remove-nth-node-from-end-of-list
0021-merge-two-sorted-lists
0146-lru-cache

Design

0146-lru-cache
0789-kth-largest-element-in-a-stream

Doubly-Linked List

0146-lru-cache

Sorting

0088-merge-sorted-array
0215-kth-largest-element-in-an-array
0217-contains-duplicate
0621-task-scheduler
1014-k-closest-points-to-origin
1018-largest-perimeter-triangle

Math

0002-add-two-numbers
0009-palindrome-number
0013-roman-to-integer
0066-plus-one
0189-rotate-array
0204-count-primes
1014-k-closest-points-to-origin
1018-largest-perimeter-triangle
1372-check-if-it-is-a-good-array

Greedy

0011-container-with-most-water
0605-can-place-flowers
0621-task-scheduler
1018-largest-perimeter-triangle

Enumeration

0204-count-primes

Number Theory

0204-count-primes
1372-check-if-it-is-a-good-array

Tree

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

Binary Search Tree

0004-median-of-two-sorted-arrays
0035-search-insert-position
0744-find-smallest-letter-greater-than-target
0789-kth-largest-element-in-a-stream

Heap (Priority Queue)

0215-kth-largest-element-in-an-array
0621-task-scheduler
0789-kth-largest-element-in-a-stream
1014-k-closest-points-to-origin
1127-last-stone-weight

Binary Tree

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

Data Stream

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

Divide and Conquer

0004-median-of-two-sorted-arrays
0215-kth-largest-element-in-an-array
1014-k-closest-points-to-origin

Geometry

1014-k-closest-points-to-origin

Quickselect

0215-kth-largest-element-in-an-array
1014-k-closest-points-to-origin

Recursion

0002-add-two-numbers
0021-merge-two-sorted-lists

String

0003-longest-substring-without-repeating-characters
0013-roman-to-integer
0014-longest-common-prefix
0020-valid-parentheses
0058-length-of-last-word

Sliding Window

0003-longest-substring-without-repeating-characters

Counting

0621-task-scheduler

Dynamic Programming

0121-best-time-to-buy-and-sell-stock

Simulation

1929-concatenation-of-array

Stack

0020-valid-parentheses

Trie

0014-longest-common-prefix