I have a library of data structures I commonly use, however I find it difficult to use them on codeforces because it requires one pubic class only. There are other editors however that support multiple classes.

This my programme structure:

class Digraph {} class Bag {} // Bag is used by Digraph public class { static digraph // declare other static variables static recursivefunction () // operates on digraph static solution () // computes and prints solution and calls recursive function, instantiate digraph static void main() // calls solution } The problem came up because codeforces judge would accept only one public class

So i tried this:

public class { class Digraph {} class Bag {} // Bag is used by Digraph static digraph // declare other static variables static recursivefunction () // operates on digraph static solution () // computes and prints solution and calls recursive function, instantiate digraph static void main() // calls solution } This gives an error that when declaring digraph because Main.this.Digraph cannot be accessed from a static context.

So, how do i use classes in a conflict free manner. Your answer would be of great help.