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Grokking the Coding Interview Patterns in Python

Solution: Number of Islands

Explore the Number of Islands problem by applying the Union Find pattern to efficiently identify and count connected land areas in a 2D grid. Understand how to traverse the grid, connect neighboring land cells, and use union operations to track the number of distinct islands. This lesson helps you implement and analyze the algorithm with clear steps and complexity insights.

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Statement

Let’s consider a scenario with an (m×n)(m \times n) 2D grid containing binary numbers, where '0' represents water and '1' represents land. If any '1' cells are connected to each other horizontally or vertically (not diagonally), they form an island. Your task is to return the total number of islands in the grid.

Constraints:

  • 1≤1 \leq grid.length ≤50\leq 50 ...