Sliding Window

Fixed and variable-size window techniques

1 Easy2 Medium1 Hard

All Problems

#	Problem	Pattern	Difficulty
121	Best Time to Buy and Sell Stock	Sliding Window Min	Easy
3	Longest Substring Without Repeating Characters	Variable Window + Set	Medium
424	Longest Repeating Character Replacement	Variable Window + Count	Medium
76	Minimum Window Substring	Variable Window + Map	Hard