using System;
using static System.Console;
using System.Linq;
using System.Collections.Generic;
using System.Globalization;

class Program
{
    static int NN => int.Parse(ReadLine());
    static int[] NList => ReadLine().Split().Select(int.Parse).ToArray();
    static int[][] NArr(long n) => Enumerable.Repeat(0, (int)n).Select(_ => NList).ToArray();
    public static void Main()
    {
        Solve();
    }
    static void Solve()
    {
        var n = NN;
        var map = NArr(n);
        var ans = 0;
        for (var i = 0; i < n; ++i)
        {
            for (var j = i + 1; j < n; ++j)
            {
                var count = 2;
                for (var k = j + 1; k < n; ++k)
                {
                    if (OnLine(map[i], map[j], map[k])) ++count;
                }
                ans = Math.Max(ans, count);
            }
        }
        WriteLine(ans);
    }
    static bool OnLine(int[] a, int[] b, int[] c)
    {
        if (a[0] == b[0])
        {
            return a[0] == c[0];
        }
        return (c[0] - a[0]) * (b[1] - a[1]) == (b[0] - a[0]) * (c[1] - a[1]);
    }
}