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Factorial Trailing Zeroes - [Easy] One liner
C++
Math
Medium
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Contains Duplicate II - Hashset
Array
C++
Easy
Hash Table
Sliding Window
-
Top K Frequent Words - [C++,Python(3/1 lines)] Two methods: Sorting / Max heap
Bucket Sort
C++
Counting
Hash Table
Heap (Priority Queue)
Medium
Python
Sorting
String
Trie
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Search a 2D Matrix II - Top right to bottom left
Array
Binary Search
C++
Divide and Conquer
Matrix
Medium
-
Min Stack - Beauty of OOP
C++
Design
Medium
Stack
-
Surrounded Regions - Island method [DFS]
Array
Breadth-First Search
Depth-First Search
Matrix
Medium
Union Find
-
Number of Islands - Easy DFS
Array
Breadth-First Search
Depth-First Search
Matrix
Medium
Union Find
-
Count Primes - Sieve of Eratosthenes with Exaplanation
Array
C++
Enumeration
Math
Medium
Number Theory