def make_line(x0,y0,x1,y1):
    a =  y1 - y0
    b = -(x1 - x0)
    c = (x1-x0) * y0 - (y1-y0) * x0
    return a, b, c

N = int(input())
XY = [tuple(map(int, input().split())) for _ in range(N)]

ans = 0
for i in range(N):
    for j in range(i+1,N):
        x0, y0 = XY[i]
        x1, y1 = XY[j]
        a,b,c = make_line(x0,y0,x1,y1)

        tmp = 0
        for x, y in XY:
            if a * x + b * y + c == 0:
                tmp += 1
        # print(a,b,c,tmp) 
        ans = max(ans,tmp)

print(ans)