import java.io.PrintWriter
import java.util.*
import kotlin.collections.ArrayDeque

val br = System.`in`.bufferedReader()
val out = PrintWriter(System.out)

fun main() {
    br.use { out.use {
        solve()
        out.flush()
    } }
}

fun solve() {
    val n = readInteger()
    val aArray = IntArray(n) { readInteger() }

    // linkedListのほうが良さそう
    val colorDequeue = mutableListOf<Int>() // 使用した色に対して最後に塗った数値
    var ans = 1
    colorDequeue += aArray.first()
    for (a in aArray.drop(1)) {
        var left = -1
        var right = colorDequeue.size
        while (right - left > 1) {
            val mid = (right + left) / 2
            if (colorDequeue[mid] < a) left = mid else right = mid
        }

        if (left == -1) {
            ans++
            colorDequeue.add(0, a)
        } else {
            colorDequeue[left] = a
        }
    }
    out.println(ans)
}

fun readInteger() = Integer.parseInt(br.readLine())
fun readLong() = java.lang.Long.parseLong(br.readLine())
fun readStringList() = br.readLine()!!.split(' ')
fun readIntegerList() = readStringList().map(Integer::parseInt)
fun readLongList() = readStringList().map(java.lang.Long::parseLong)
fun readDoubleList() = readStringList().map(java.lang.Double::parseDouble)
