n=int(input())
xy=[]
for i in range(n):
  x,y=map(int,input().split())
  xy.append((x,y))
a=[]
for i in range(n):
  for j in range(n):
    if i==j:continue
    x1,y1=xy[i]
    x2,y2=xy[j]
    a.append((x1,y1,x2,y2))
ans=0
for i in range(len(a)):
  x1=a[i][0]
  y1=a[i][1]
  x2=a[i][2]
  y2=a[i][3]
  t=0
  for x,y in xy:
    if (x2-x1)*(y-y1)==(y2-y1)*(x-x1):t+=1
  ans=max(ans,t)
print(ans)