midArrays
What is Sliding Window Technique?
Updated Apr 28, 2026
Short answer
Sliding window optimizes subarray problems using a moving window.
Deep explanation
Instead of recalculating values repeatedly, sliding window reuses previous computations by expanding and shrinking the window.
Real-world example
Finding max sum subarray of size k.
Common mistakes
- Not adjusting window correctly.
Follow-up questions
- Fixed vs variable window?
- Why sliding?