The Island Counter

A medium Python interview practice problem on DataDriven. Write and execute real python code with instant grading.

Domain

Python

Difficulty

medium

Seniority

L4

Problem

Given a 2D grid of '1' (land) and '0' (water) strings, return the number of distinct islands (connected groups of land cells using 4-directional adjacency).

Summary

Surrounded by water, connected by land - how many separate landmasses?

Practice This Problem

Solve this Python problem with real code execution. DataDriven runs your Python code in a real environment and grades it automatically.