import java.util.Scanner;
public class BasicExamStatistics {
   public static void print(string s) {
      System.out.println(s);
   }
   public static void main(String[] args) {
   int count = 0;
      System.out.println("Enter numerical grades\n"+
         "in the range of 0 - 100 -\n" +
         "integers, only, please!");

      System.out.println("Enter -1 to terminate data entry.");

      while(true) {
         System.out.println("Please enter a score from 0 to 100, or -1 to quit.");
         Scanner scn = new Scanner(System.in);
         int newGrade = scn.nextInt();
         if (newGrade == -1) break;
         count++;
      }
      print("Total number of grades = " + count);
      print("Number of A's = " + As);
      print("Number of B's = " + Bs);
      print("Number of C's = " + Cs);
      print("Number of D's = " + Ds);
      print("Number of F's = " + Fs);