A + B

input/Csestraining.java:1: error: class Cses_training is public, should be declared in a file named Cses_training.java
public class Cses_training {
       ^
input/Csestraining.java:4: error: cannot find symbol
        IO io = new IO();
        ^
  symbol:   class IO
  location: class Cses_training
input/Csestraining.java:4: error: cannot find symbol
        IO io = new IO();
                    ^
  symbol:   class IO
  location: class Cses_training
3 errors

public class Cses_training {

    public static void main(String[] args) {
        IO io = new IO();
        
        int f = io.nextInt();
        int s = io.nextInt();
        
        io.println(f+s);
		io.close();
    }
    
}