About This Pattern
Master the Sliding Window pattern by practicing these problems organized by difficulty.Focus on the Key Signals - these are the indicators that tell you when to use this pattern.
Medium (2)
Longest Substring Without Repeating Characters
Find the length of the longest substring without repeating characters.
Key Signals:
Window expands rightShrink when duplicate foundTrack characters in window
Longest Repeating Character Replacement
Find length of longest substring with same letters after replacing at most k characters.
Key Signals:
Track character frequenciesWindow size - max frequency <= kSlide window when invalid
Hard (1)
Minimum Window Substring
Find the minimum window substring containing all characters of another string.
Key Signals:
Expand until validContract to minimizeTrack required characters