n = int(input())
XY = [list(map(int,input().split())) for i in range(n)]

ans = 0
for i in range(n):
    for j in range(i):
        x1,y1 = XY[i]
        x2,y2 = XY[j]
        dx,dy = x1-x2,y1-y2
        count = 0
        for x,y in XY:
            dx2,dy2 = x-x2,y-y2
            if dx*dy2 == dx2*dy:
                count += 1
        ans = max(ans,count)
print(ans)