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Grokking the Coding Interview Patterns in C++

Solution: Number of Islands

Explore how to apply the Union Find data structure to solve the Number of Islands problem. This lesson guides you through counting land cells, connecting adjacent lands, and decrementing island count upon union operations. You will understand how to efficiently traverse and merge connected components in a grid, gaining practical skills in graph connectivity and sets.

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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 ...