/in/Main.java:5: error: <identifier> expected
  public void static main(String[] args)
             ^
/in/Main.java:5: error: '(' expected
  public void static main(String[] args)
              ^
/in/Main.java:5: error: invalid method declaration; return type required
  public void static main(String[] args)
                     ^
/in/Main.java:8: error: ';' expected
    Scanner scan = new Scanner(System.in)
                                         ^
/in/Main.java:9: error: ';' expected
    a = scan.nextInt(),b = scan.nextInt();
                      ^
5 errors