n = int(input())
xy=[list(map(int,input().split())) for i in range(n)]

from itertools import *

ans=0
for itm in combinations(xy,2):
    x1,y1=itm[0]
    x2,y2=itm[1]

    cnt=0
    for p in xy:
        x,y=p
        if (y-y1)*(x2-x1) == (y2-y1)*(x-x1):
            cnt+=1
    ans = max(cnt,ans)
print(ans)