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

ans=0

for i in range(n-1):
    a,b=ns[i]
    for j in range(i+1,n):
        c,d=ns[j]
        cnt=2
        for k in range(n):
            if i == k or j == k:
                continue
            e,f=ns[k]
            if (f-b)*(c-a) == (d-b)*(e-a):
                cnt+=1
            ans=max(ans,cnt)
print(ans)