Quick Overview

Count four-directionally connected islands in a potentially large binary grid without changing the caller's input. The problem emphasizes complete graph traversal, empty and narrow grids, and avoiding recursive stack overflow on long components.

Count Islands in a Binary Grid

Company: Apple

Role: Software Engineer

Category: Coding & Algorithms

Difficulty: medium

Interview Round: Technical Screen

Overview: Count four-directionally connected islands in a potentially large binary grid without changing the caller's input. The problem emphasizes complete graph traversal, empty and narrow grids, and avoiding recursive stack overflow on long components.

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