N=int(input())
A=[tuple(map(int, input().split())) for _ in range(N)]
ans=1
for i in range(N):
    for j in range(i+1,N):
        tmp=2
        for k in range(j+1,N):
            if (A[i][0]-A[j][0])*(A[i][1]-A[k][1])==(A[i][1]-A[j][1])*(A[i][0]-A[k][0]):
                tmp+=1
        ans = max(ans, tmp)
print(ans)