uri online judge 1930 solution in c++

The Problem: URI Online Judge 1930

The problem requires reading four integers and calculating the total number of connections needed for a four-way socket, considering that each socket can have multiple connections.

The Solution in C++ with Explanations:

#include <iostream>

int main() {
    int a, b, c, d;
    std::cin >> a >> b >> c >> d;
    int total_connections = (a - 1) + (b - 1) + (c - 1) + d;
    std::cout << total_connections << std::endl;
    return 0;
}

1. Include Necessary Header:

2. The #include <iostream> statement includes the input/output stream library.

3. Main Function:

4. The main() function is the entry point of the program.

5. Declare Variables:

6. Four integers a, b, c, and d are declared to store the input values.

7. Read Input:

8. std::cin >> a >> b >> c >> d; reads the four integer inputs.

9. Calculate Total Connections:

10. total_connections is calculated as the sum of (a - 1) + (b - 1) + (c - 1) + d, representing the total number of connections needed for the four-way socket.

11. Output Result:

12. std::cout << total_connections << std::endl; outputs the total connections to the standard output.

13. Return Statement:

14. return 0; indicates successful program execution.