👩🏫
👨💼
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
1Flatten the Snack Binseasy
2Part 2
3Part 3
Start Part 1 to unlock your next challenge
Based onLeetCode
mediumNeetCode 150
Snack Bin Iterator — Flatten Nested Lists
Also known as: Flatten Nested List Iterator
This one is all about maintaining a clear stack meaning as you process input. Interviewers love it because it reveals your stack invariants and your edge-case discipline. Keep the stack invariant explicit; if it breaks, everything downstream breaks too.
DesignStack
👩🏫
👨💼
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
1Flatten the Snack Binseasy
2Part 2
3Part 3
Start Part 1 to unlock your next challenge
Based onLeetCode
Get this problem sent to your inbox