# Python!

with open('03.txt') as file:
	sets = file.read().splitlines()

grid = []
vgroups = []
for i, s in enumerate(sets):
	set = [int(n) for n in s.split()]
	grid.append(set)

	if len(grid) == 3:
		[vgroups.append(list(g)) for g in zip(*grid)]
		grid = []

count = 0
for s in vgroups:
	s.sort()
	if s[0] + s[1] > s[2]:
		count += 1

print(count)