import java.io.BufferedReader
import java.io.InputStream
import java.io.InputStreamReader
import java.io.PrintWriter
import java.lang.StringBuilder
import java.util.*

fun PrintWriter.solve(sc: FastScanner) {
    val n = sc.nextInt()
    val x = Array(n) { 0 }
    val y = Array(n) { 0 }
    for (i in 0 until n) {
        x[i] = sc.nextInt()
        y[i] = sc.nextInt()
    }
    var ans = 0
    for (a in -100..100) {
        for (b in -100..100) {
            var count = 0
            for (i in 0 until n) {
                if (y[i] == a * x[i] + b) {
                    count++
                }
            }
            ans = maxOf(count, ans)
        }
    }
    for (a in 0..100) {
        var count = 0
        for (i in 0 until n) {
            if (x[i] == a) {
                count++
            }
        }
        ans = maxOf(count, ans)
    }
    println(ans)
}

fun main(args: Array<String>) {
    val writer = PrintWriter(System.out, false)
    writer.solve(FastScanner(System.`in`))
    writer.flush()
}

class FastScanner(s: InputStream) {
    private var st = StringTokenizer("")
    private val br = BufferedReader(InputStreamReader(s))

    fun next(): String {
        while (!st.hasMoreTokens()) st = StringTokenizer(br.readLine())

        return st.nextToken()
    }

    fun nextInt() = next().toInt()
    fun nextLong() = next().toLong()
    fun nextLine() = br.readLine()
    fun nextDouble() = next().toDouble()
    fun ready() = br.ready()
}