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

    ans = ans.max cnt

echo ans