#!/usr/bin/env python3

import sys, re

lines=[[int(x) for x in re.findall(r"\d+",l)] for l in sys.stdin.read().split("\n")[:-1]]

count=0
for i in range(len(lines)//3):
	for j in range(3):
		a,b,c=[l[j] for l in lines[3*i:3*i+3]]
		if a+b+c>2*max(a,b,c):
			count+=1

print(count)