import sys
input=lambda: sys.stdin.readline().rstrip()
n=int(input())
XY=[list(map(int,input().split())) for _ in range(n)]

def ct(x1,y1,x2,y2):
  ret=0
  for x,y in XY:
    if (x1-x)*(y2-y)==(y1-y)*(x2-x):
      ret+=1
  return ret
ans=0
import itertools
for P1,P2 in itertools.combinations(XY,2):
  x1,y1=P1
  x2,y2=P2
  ans=max(ans,ct(x1,y1,x2,y2))
print(ans)