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Grokking the Coding Interview Patterns in C++

Solution: Number of Islands

Understand how to apply the Union Find pattern to solve the Number of Islands problem by connecting land cells in a grid. This lesson guides you through counting isolated islands, performing union operations on adjacent land cells, and returning the total island count efficiently.

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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 ...