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Hard

LeetCode 30: Substring with Concatenation of All Words
·2 分鐘
LeetCode Daily Hard String Sliding Window Two Pointers Hash Map Frequency-Counter Brute-Force
三種作法：暴力、計數優化、偏移量滑動視窗。
LeetCode 76: Minimum Window Substring
·1 分鐘
LeetCode Daily Hard Sliding Window String Hash Map Two Pointers Variable Window
LeetCode 解題紀錄 - 可變大小滑動窗口與字符計數
LeetCode 239: Sliding Window Maximum
·1 分鐘
LeetCode Daily Hard Monotonic Queue
LeetCode 解題紀錄
LeetCode 2999: Count the Number of Powerful Integers
·1 分鐘
LeetCode Daily Hard Digit DP
LeetCode 解題紀錄