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Based onLeetCode
mediumNeetCode 150
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This is a stack/invariant problem: once your stack represents the right thing, the rest is routine. Interviewers love it because it reveals your stack invariants and your edge-case discipline. Most solutions fail when the stack meaning gets fuzzy—name it and guard it.
Arrays & HashingStack
👩🏫
👨💼
Meet Allison & Tim
Your AI coaches
Practice coding interviews out loud with real-time voice coaching. Your code actually runs.
Free · No sign up · Early access
1Daily Temperaturesmedium
2Part 2
3Part 3
Start Part 1 to unlock your next challenge
Based onLeetCode
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