using System;
using System.Linq;
using System.Collections.Generic;

public class Hello{
    public static int N;
    public static int[] A;
    public static void Main(){
        N = int.Parse(Console.ReadLine());
        A = new int[N];
        for(int i=0; i<N; i++){
            A[i] = int.Parse(Console.ReadLine());
        }
        //???????¢??????¨??????????????????????¨?????????¨???????????????????????§?§£???
        var L = Enumerable.Repeat(int.MaxValue, N).ToArray();
        int length = 1;
        L[0] = A[0];
        for(int i=1; i<N; i++){
            if(L[length-1]<A[i]){
                L[length] = A[i];
                length++;
            }else{
                //A[i]???L??????????????´????????\????????????????????????
                //???????????´?????¨??????L???????????§A[i]?????????????????§?????°????????????????????????????????§?????????
                var alterIdx = LowerBound(L, A[i]);
                L[alterIdx] = A[i];
            }
        }
        Console.WriteLine(length);
    }
    
    //array???????????§target?????????????????§???????????????????????????
    public static int LowerBound(int[] array, int target){
        int left = 0;
        int right = array.Count();
        int mid = 0;
        while(left<right){
            mid = (right+left)/2;
            if(array[mid]==target) break;
            if(target<array[mid])right = mid;
            else left = mid+1;
        }
        return left;
    }
}