View Compilation Error

0_0_6795532_20701\Main.java:1: class, interface, or enum expected
public static void main(String[] args) {
              ^
0_0_6795532_20701\Main.java:3: class, interface, or enum expected
		String s = scan.nextLine();
		^
0_0_6795532_20701\Main.java:4: class, interface, or enum expected
		int a = Integer.valueOf(s.substring(0, s.indexOf(" ")));
		^
0_0_6795532_20701\Main.java:5: class, interface, or enum expected
		int b = Integer.valueOf(s.substring(s.lastIndexOf(" ")+1, s.length()));
		^
0_0_6795532_20701\Main.java:6: class, interface, or enum expected
		int c=a+b;
		^
0_0_6795532_20701\Main.java:7: class, interface, or enum expected
		System.out.println(c);
		^
0_0_6795532_20701\Main.java:8: class, interface, or enum expected
	}