n = gets.to_i
xy = n.times.map { gets.split.map &:to_i }

ans = 0
xy.each do |x, y|
    p2 = xy.map {|x2, y2| [x2 - x, y2 - y] }
    cnt = Hash.new(0)
    cnt0 = 0
    p2.select {|x2, y2| x2 != 0 || y2 != 0 }.each do |x2, y2|
        if y2 == 0
            cnt0 += 1
        else
            cnt[Rational(x2, y2)] += 1
        end
    end
    ma = (cnt.empty? ? cnt0 : [cnt.values.max, cnt0].max) + 1

    ans = ma if ans < ma
end
puts ans