import sequtils, strutils

let read* = iterator: string {.closure.} =
  while true: (for s in stdin.readLine.split: yield s)

template input*(T: static[typedesc]): untyped = 
  when T is int: read().parseInt
  elif T is float: read().parseFloat
  elif T is string: read()

let N = input(int)
let P: seq[tuple[x: int, y: int]] = 
  newSeqWith(N, (input(int), input(int)))

var res = 0
for a in -200 .. 200:
  for b in -200 .. 200:
    var cnt = 0
    for (x, y) in P:
      if y == a * x + b:
        cnt += 1
    res = max(res, cnt)
echo res