This repository contains an implementation of Dijkstra's algorithm in C++. Dijkstra's algorithm is a widely used algorithm for finding the shortest paths between nodes in a graph, which may represent, for example, road networks.

• src/: Contains the C++ source code for the Dijkstra's algorithm implementation.
• README.md: This README file providing an overview of the project.

To use the Dijkstra's algorithm implementation, follow these steps:

1. Clone the repository to your local machine.

2. Navigate to the src/ directory.

3. Compile the C++ source code using a C++ compiler (e.g., g++):

   g++ dijkstra.cpp -o dijkstra

4. Run the executable with the input graph file as a command-line argument:

   ./dijkstra input_graph.txt

   Replace input_graph.txt with the path to your input graph file. The input graph file should be in a specific format (e.g., adjacency list or adjacency matrix) as expected by the program.

The input graph file should contain the graph representation in a specific format. For example, if using an adjacency list representation, each line in the file may represent a node followed by its adjacent nodes and corresponding edge weights.

Example input graph file format:

1 2:10 3:5
2 4:3
3 2:2 4:9
4 5:2
5

This represents a graph with nodes 1 to 5 and their adjacent nodes with corresponding edge weights.

• The program reads the input graph from a file and constructs a graph data structure.
• It applies Dijkstra's algorithm to find the shortest paths from a specified source node to all other nodes in the graph.
• The implementation may include optimizations or variations of Dijkstra's algorithm, depending on specific requirements or constraints.

• This implementation provides a basic version of Dijkstra's algorithm. Depending on the application, you may need to customize or extend it to handle specific edge cases or requirements.
• Ensure that the input graph file follows the expected format for proper execution of the program.

This repository contains a solution for finding journeys in a bus network based on General Transit Feed Specification (GTFS) data. The program takes two command-line inputs: the source stop ID and the destination stop ID, and prints all possible direct journeys and journeys with one transfer between the specified stops.

• src/: Contains the C++ source code for the solution.
• data/: Contains sample GTFS data files used for testing.
• README.md: This README file providing an overview of the project.

To run the program, follow these steps:

1. Clone the repository to your local machine.

2. Navigate to the src/ directory.

3. Compile the C++ source code using a C++ compiler (e.g., g++):

   g++ main.cpp -o bus_journey_finder

4. Run the executable with the source and destination stop IDs as command-line arguments:

   ./bus_journey_finder source_stop_id destination_stop_id

   Replace source_stop_id and destination_stop_id with the actual stop IDs you want to find journeys between.

The data/ directory contains sample GTFS data files (stops.txt and routes.txt) used for testing the program. You can replace these files with your own GTFS data files if needed.

• The program parses GTFS data to construct a graph representing the bus network, where stops are nodes and routes are edges connecting them.
• It uses graph traversal algorithms to find direct journeys and journeys with one transfer between the specified stops.

• This solution provides basic functionality for finding journeys with direct routes and one transfer. You can extend it to handle journeys with two transfers by implementing similar logic.
• The GTFS data used in this solution is simplified for demonstration purposes. In a real-world scenario, you may need to adapt the parsing logic to handle more complex data structures.