N=int(input())
p=[list(map(int,input().split())) for _ in range(N)]
mx=0
for i,(xi,yi) in enumerate(p):
	for j,(xj,yj) in enumerate(p[i+1:]):
		cn=0
		for xk,yk in p[i+j+2:]:
			if (xk-xi)*(yj-yi)==(xj-xi)*(yk-yi):	cn+=1
		if cn>mx:	mx=cn
print(mx+2)