#  efficient.py:
 #  Author:  James Tam
 #  Version: January 25, 2008
 
 #  A program that conerts a numeric gpa to a letter grade. The current version
 #  of the program assumes that only integer gpa values will be used. and
   
 #  Note: This program is more efficient than the inefficient version because
 #  once the first GPA match is found the other cases won't be checked.

print "Input GPA as an integer: ",
gpa = input()
letter = 'W'

if (gpa == 4):
    print "Letter grade is an A"
    "Great job!"
    letter = 'A'

elif (gpa == 3):
   print "Letter grade is a B"
   print "Good job"
   letter = 'B'

elif (gpa == 2):
   writeln('Letter grade is a C');
   writeln('Average grade');
   letter = 'C';

elif (gpa == 1):
   print "Letter grade is a D"
   print "Better luck next time."
   letter = 'D'

elif (gpa == 0):
   print "Letter grade is an F"
   print "Try again kid."
   letter = 'F'

else:
   print "GPA must be one of '4', '3', '2', '1' or '1'"
   
print "GPA: ", gpa, "\t", "Letter: ", letter