N=int(input())
L=[list(map(int,input().split())) for _ in range(N)]
ans=0
for i in range(N):
  for j in range(i):
    Xi,Yi=L[i]
    Xj,Yj=L[j]
    cnt=0
    for k in range(N):
      Xk,Yk=L[k]
      cnt+=int((Xj-Xi)*(Yk-Yi)==(Xk-Xi)*(Yj-Yi))
    ans=max(ans,cnt)
print(ans)