n = int(input())
xy = [list(map(int, input().split())) for i in range(n)]
ans = 0
for i in range(n-1):
    basex,basey = xy[i][0],xy[i][1]
    for j in range(i+1,n):
        X,Y = xy[i][0]-xy[j][0], xy[i][1]-xy[j][1]
        tmp = 0
        for x,y in xy:
            x -= basex
            y -= basey
            if not (x*Y - y*X):
                tmp += 1
        ans = max(ans,tmp)

print(ans)