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Hash Map

LeetCode 30: Substring with Concatenation of All Words (Brute Force → Counting → Sliding Window)
·3 mins
LeetCode Daily Hard String Sliding Window Two Pointers Hash Map Frequency-Counter Brute-Force
Three approaches: brute force, counting optimization, and sliding window over word-length offsets.
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 76: Minimum Window Substring
·3 mins
LeetCode Daily Hard Sliding Window String Hash Map Two Pointers Variable Window
LeetCode Problem Solving - Variable Size Sliding Window with Character Counting
LeetCode 1399: Count Largest Group
·1 min
LeetCode Daily Easy Hash Map
LeetCode Problem Solving
LeetCode 2325: Decode the Message
·1 min
LeetCode Hash Map Easy
LeetCode Problem Solving