/in/Main.java:4: error: class, interface, or enum expected
   public static void main(String[] args)throws IOException{
                 ^
/in/Main.java:7: error: class, interface, or enum expected
        int a=cin.nextInt();//??????
        ^
/in/Main.java:8: error: class, interface, or enum expected
		int b=cin.nextInt();
		^
/in/Main.java:9: error: class, interface, or enum expected
		 System.out.println(a+b);
		 ^
/in/Main.java:10: error: class, interface, or enum expected
		}
		^
5 errors