Introduction - If you have any usage issues, please Google them yourself
Data Entry: The input data provided by the file input.txt. The first line of the file has two positive integers n and c, where n is the size of S, and c is the target of subset sum. In the next line, there are n positive integers, which represent the elements in the set S.
Result Output: Output the subset and problem solutions to the file output.txt. When the problem is not solved, "No Solution" is output.