# Grades3 Example
# Source code file: grades3.py
# Input file: grades.txt

# Compute the maximum of all the grades.

sum = 0
fin = open("grades.txt", "r")

# Read and process first line from file
line = fin.readline( )
grade = int(line.strip( ))
maximum = grade

# Process lines until end of file
while line != "":
    grade = int(line.strip( ))
    maximum = max(maximum, grade)
    line = fin.readline( )

print("Maximum of grades:", maximum)
fin.close( )

# Output:
# Maximum of grades: 100