n=int(input())
xy=[[*map(int,input().split())] for _ in range(n)]
ans=2
for a in range(n):
    for b in range(a+1,n):
        dx=xy[a][0]-xy[b][0]
        dy=xy[a][1]-xy[b][1]
        cnt=0
        for i in range(n):
            dx2=xy[a][0]-xy[i][0]
            dy2=xy[a][1]-xy[i][1]
            cnt+=dy*dx2==dy2*dx
        ans=max(ans,cnt)
print(ans)