def input_int():
    return int(input())

def input_ints():
    return list(map(int, input().split()))

N = input_int()
P = []
for _ in range(N):
    x, y = input_ints()
    P.append((x, y))

def det(a, b, c, d):
    return a * d - b * c

ans = 0
for i in range(N):
    for j in range(i + 1, N):
        cnt = 2
        for k in range(j + 1, N):
            if det(P[j][0] - P[i][0], P[j][1] - P[i][1], P[k][0] - P[i][0], P[k][1] - P[i][1]) == 0:
                cnt += 1
        ans = max(ans, cnt)

print(ans)