PYTHON PROBLEM 257 · Interview

Count islands in a grid: Three islands

Count separate land regions in a small map.

Define state → recurrence → base cases → evaluation orderDFSgrid

PROBLEM OVERVIEW

What this Python exercise asks you to practise

This scenario tests count islands in a grid. It belongs to the Dynamic Programming and High-Frequency Interviews roadmap and uses the define state → recurrence → base cases → evaluation order pattern.

Finish with high-frequency dynamic programming, grid, graph-ordering, and sliding-window problems.

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INTERVIEW CONTEXT

Skills and reported company tags

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