👩🏫
👨💼
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
1Count Number of Islandsmedium
2Part 2
3Part 3
Start Part 1 to unlock your next challenge
Based onLeetCode
mediumBlind 75
Number of Islands
This is really about exploring a state space without revisiting the same work. Interviewers love it because it reveals your traversal modeling and your edge-case discipline. The trap is revisiting states or missing a base case; your visited/queue logic needs to be tight.
Arrays & HashingGraphsBFS / DFS
👩🏫
👨💼
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
1Count Number of Islandsmedium
2Part 2
3Part 3
Start Part 1 to unlock your next challenge
Based onLeetCode
Get this problem sent to your inbox