public class W2 {
      public static void main(String args[]) {
         int c=75;
         switch (c<60?1:c<=70?2:c<=80?3:c<90?4:5) {
             case 1: 
                  System.out.println(" "+c+"分 不及格");
             break;
            case 2: 
                   System.out.println(" "+c+"分 及格");
             break;
            case 3: 
                   System.out.println(" "+c+"分 中");
             break;
            case 4: 
                   System.out.println(" "+c+"分 良");
             break;
           default:
                  System.out.println(" "+c+"分 優(yōu)");
        }
    }
}