N = int(input())
x = [0] * N
y = [0] * N
for i in range(N):
    x[i],y[i] = map(int,input().split())
_max = 0
for i in range(N-1):
    for j in range(i + 1,N):
        ans = 0
        for k in range(N):
            if (x[i]-x[j]) * (y[k]-y[i]) == (y[i]-y[j]) * (x[k]-x[i]):
                ans += 1
        if ans > _max:
            _max = ans
print(_max)