public class DDD {
 {
  Scanner scn = new Scanner(System.in);
 
 int month = scn.nextlnt();

   if (month == 1)
  System.out.println("31");
  else if (month == 2)
   System.out.println("28");
  else if (month == 3)
   System.out.println("30");
  else if (month == 4) 
   System.out.println("31");
  else if (month == 5)
   System.out.println("30");
  else if (month == 6)
   System.out.println("31");
  else if (month == 7)
   System.out.println("30");
  else if (month == 8)
   System.out.println("31");
  else if (month == 9)
   System.out.println("30");
  else if (month == 10)
   System.out.println("31");
  else if (month == 11)
   System.out.println("30");
  else if (month == 12)
   System.out.println("31");
 
 }
 
}














에러는  Scanner cannot be resolved to a type 이거 두개뜸