import java.io.BufferedReader
import java.io.InputStreamReader
import java.io.PrintWriter
import java.util.*

fun main(args: Array<String>) = yorukatsu13e()

fun yorukatsu13e() = FastIO().exec {
    val n = int()
    val aList = (1..n).map { int() }

    val list = mutableListOf<Int>()

    fun lowerBound(list: List<Int>, key: Int): Int {
        var ok = list.size
        var ng = -1

        while (ok - ng > 1) {
            val mid = (ng + ok) / 2
            if (list[mid] >= key) ng = mid else ok = mid
        }
        return ok
    }

    for (a in aList) {
        val lowerBound = lowerBound(list, a)
        when (lowerBound) {
            in list.indices -> list[lowerBound] = a
            else -> list.add(a)
        }
    }

    val answer = list.size

    println(answer)
}

// region

@Suppress("unused")
class FastIO {
    private val br = BufferedReader(InputStreamReader(System.`in`))
    private var st = StringTokenizer("")
    val pw = PrintWriter(System.out)

    fun string(): String {
        if (!st.hasMoreTokens()) st = StringTokenizer(br.readLine())
        return st.nextToken()
    }

    fun int() = string().toInt()
    fun long() = string().toInt()
    fun double() = string().toInt()
    fun nextLine() = br.readLine()!!
    fun println() = pw.println()
    fun <T> print(o: T) = pw.print(o)
    fun <T> println(o: T) = pw.println(o)

    inline fun exec(code: FastIO.() -> Unit) {
        code()
        pw.flush()
    }
}
// endregion
