#Nested Loops
#Write a program that first reads number of students in the major
#then for each student program reads the number courses student takes in Fall 
#semester, then for each course, program reads the final grade.
#Program finds the average grade per semester for each student
#Program also finds the average grade overall in Fall semester
#Example:
#Suppose we have 2 students, and student 1 takes 3 courses, grades 100, 90, 78
#and student 2 takes 4 courses, grades 89, 78, 56, 67
#The output: student 1 average is (100+90+78)/3 = 89; student 2 average is
#(89+78+56+67)/4 = 72
#The average overall (100+90+78+89+78+56+67)/7 =79
#We will convert final averages to integers (truncated integers)
def main():
	num_students=int(input("enter number of students "))
	total_grade=0
	total_courses=0
	for i in range(num_students):
		print("enter number of courses for student", i+1)
		num_courses=int(input(""))
		sum=0
		for j in range(num_courses):
			print("enter grade for course", j+1)
			grade=int(input(""))
			sum=sum+grade
		ave=sum/num_courses
		print("average grade for student",i+1,"is",(int)(ave))
		total_grade=total_grade+sum
		total_courses=total_courses+num_courses
	ave_overall=total_grade/total_courses
	print("overall average", (int)(ave_overall))
main()