Fixed-Size Window · Fixed-size count window
Find All Anagrams in a String
LeetCode 438 · Module: Pointers & Windows
The scenario
you are tracking a live segment — the active users, the current substring, the open interval — and the answer changes as the boundaries move.
What you'll learn
- How to recognize the Fixed-Size Window pattern from the problem statement.
- The BASIC Framework breakdown for this problem.
- A clean, interview-ready Python solution with time/space analysis.
Full video, code, and the workspace are part of PatternMastery Pro — 500 problems for one $9.99 payment.