myfile = 'list.txt'
fh = open(myfile,'r')
calorie = 0
highest_cal = 0
for line in fh:
	if (line.isspace()) == True:
		if (calorie>highest_cal):
			highest_cal = calorie
			print(calorie)
		calorie = 0
	else:

		calorie+= int(line)


print(highest_cal)