n = int(input())
if n == 2:
    print(2)
    exit()

P = [list(map(int, input().split())) for _ in range(n)]
ans = 0
for i in range(n - 2):
    for j in range(i + 1, n - 1):
        cnt = 2
        vx, vy = P[j][0] - P[i][0], P[j][1] - P[i][1]
        for k in range(j + 1, n):
            ux, uy = P[k][0] - P[i][0], P[k][1] - P[i][1]
            if vx * uy - vy * ux == 0:
                cnt += 1
        ans = max(ans, cnt)
print(ans)