mediumGraphsPattern: DFS
Connected Modules Count Solution
Problem Statement
You are given a list of pairs representing the connections between modules, where each pair contains the identifiers of two connected modules. Implement a function to determine the number of connected modules using Depth-First Search (DFS), given a start module. The function should return the count of connected modules.
Examples
Example 1:
Input:{"modules":27,"tubes":[[1,2],[2,3],[3,4],[1,4],[4,19],[19,27]],"centralControlRoom":19}
Output:7
Explanation: The tubes connect modules 1, 2, 3, 4, 19, and 27, which are reachable from the central control room. Other modules are not connected.
Constraints
- The lake is represented as a 2D array of integers where 0 represents land and 1 represents water.
- The Pacific and Atlantic oceans are at the top and bottom rows of the lake, respectively.
- Each cell can move in four directions (up, down, left, right) to adjacent cells.
Time: O(R*C) Space: O(R*C)
The optimized approach uses Depth-First Search with a time complexity of O(V + E), where V is the number of modules and E is the number of tubes.
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