import math
n = int(input())
xy = [tuple(map(int, input().split())) for i in range(n)]

ans = 0
for i in range(n):
    for g in range(i+1, n):
        same = 2
        s = xy[i]
        t = xy[g]
        tan = math.atan2(t[1]-s[1], t[0]-s[0])
        for l in range(n):
            if i == l or g == l:
                continue
            x, y = xy[l]
            if tan == math.atan2(y-s[1], x-s[0]):
                same += 1
        ans = max(ans, same)

print(ans)