n=int(input())
l=[list(map(int,input().split())) for _ in range(n)]
s=[0,0]*n*(n//2)
z=0
for i in range(n):
	for j in range(i):
		if i==j: continue
		#print(i,j,l[i],l[j])
		a=(l[i][1]-l[j][1])/max((l[i][0]-l[j][0]),0.01)
		b=l[i][1]-l[i][0]/max(a,0.01)
		s[i*i+j]=[a,b]
s=[x for x in s if x!=0]
for x in s:
	z=max(z,s.count(x))
print(z+1)