import sequtils, strutils

let
  n = parseInt readLine stdin
  xys = n.newSeqWith stdin.readLine.split.map parseFloat

var
  ans = 2
  cnt: int

for i in 0 ..< n.pred 2:
  for j in i.succ ..< n.pred:
    let
      x1 = xys[i][0]
      y1 = xys[i][1]
      x2 = xys[j][0]
      y2 = xys[j][1]
      dx = x2 - x1
      dy = y2 - y1
    cnt = 2
    
    for k in j.succ ..< n:
      let
        x3 = xys[k][0]
        y3 = xys[k][1]
      if dx == 0 and x1 == x3:
        inc cnt
      elif dy == 0 and y1 == y3:
        inc cnt
      elif dy / dx * (x3 - x1) == y3 - y1:
        inc cnt

    ans = ans.max cnt

echo ans