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Medium

LeetCode 1497: Check If Array Pairs Are Divisible by k (Remainder Pairing, Modulo)
·2 mins
LeetCode Daily Medium Array Hash Map Modulo Math Counting Complement
Remainder pairing with a hash map; handle 0 and k/2 remainders carefully.
LeetCode 904: Fruit Into Baskets
·3 mins
LeetCode Daily Medium Sliding Window Hash Map Two Pointers Variable Window
LeetCode Problem Solving - Variable Size Sliding Window with Hash Map
LeetCode 1658: Minimum Operations to Reduce X to Zero
·3 mins
LeetCode Daily Medium Sliding Window Array Reverse Thinking Prefix Sum
LeetCode Problem Solving - Reverse Thinking with Sliding Window
LeetCode 1456: Maximum Number of Vowels in a Substring of Given Length
·2 mins
LeetCode Daily Medium Sliding Window String Vowel Counting Fixed Window
LeetCode Problem Solving - Fixed Size Sliding Window with Vowel Counting
LeetCode 1052: Grumpy Bookstore Owner
·3 mins
LeetCode Daily Medium Sliding Window Array Optimization Fixed Window
LeetCode Problem Solving - Fixed Window with Customer Satisfaction Optimization
LeetCode 1004: Max Consecutive Ones III
·3 mins
LeetCode Daily Medium Sliding Window Array Two Pointers Binary Array
LeetCode Problem Solving - Variable Size Sliding Window with Zero Counting
LeetCode 713: Subarray Product Less Than K
·3 mins
LeetCode Daily Medium Sliding Window
LeetCode Problem Solving
LeetCode 567: Permutation in String
·4 mins
LeetCode Daily Medium Sliding Window String Permutation Frequency Counting Hash Table
LeetCode Problem Solving - Sliding Window with Character Frequency
LeetCode 438: Find All Anagrams in a String
·4 mins
LeetCode Daily Medium Sliding Window Hash Table String Anagram Frequency Counting
LeetCode Problem Solving - Sliding Window with Character Frequency
LeetCode 3: Longest Substring Without Repeating Characters
·2 mins
LeetCode Daily Medium Sliding Window Hashmap
LeetCode Problem Solving