#write a program that reads student grades (valid grade is an integer between 0  and 
#100, first non-valid input will terminate the input
#program finds the number of passing grades, and the number of failing grades

def main():
	list_grades=[]
	grade=int(input("enter grade, integer between 0 and 100 "))
	while(grade>=0 and grade<=100):
		list_grades.append(grade)
		grade=int(input("enter grade, integer between 0 and 100 "))
	print("list of the grades is")
	print(list_grades)
	size=len(list_grades)
	print("there are",size,"grades in the list")
	count_pass=0
	count_fail=0
	for i in range(size):
		if(list_grades[i]>=60):
			count_pass+=1
		else:
			count_fail+=1
	print("number of students who passed", count_pass)
	print("number of students who failed", count_fail)

main()