N, = map(int, input().split())
X = []
for _ in range(N):
    x, y = map(int, input().split())
    X.append((x, y))

r = 0
for i in range(N):
    a, b = X[i]
    for j in range(i+1, N):
        c, d = X[j]
        cc = 0
        for k in range(N):
            x, y = X[k]
            if (d-b)*(x-c) - (c-a)*(y-d) == 0:
                cc += 1
        r = max(r, cc)

print(r)