//Longest Increasing Subsequence
#include <iostream>
#include <cstdio>
#define N 1000000
using namespace std;
int a[N], b[N];
int lis(int n)
{
    int len;
    int l, r, mid;
    if(n == 0)
       return 0;
    b[1] = a[0];
    len = 1;
    for(int i=1; i<n; i++)
    {
        l = 1;
        r = len;
        while(l <= r)
        {
            mid = (l+r) / 2;
            if(a[i] > b[mid])
                l = mid+1;
            else
                r = mid-1;
        }
        b[l] = a[i];
        if(l > len)
            len += 1;
    }
    return len;
}
int main()
{
    int n;
    while(scanf("%d", &n) !=EOF)
    {
        for(int i=0; i<n; i++)
           scanf("%d", &a[i]);
        printf("%d\n", lis(n));
    }
	return 0;
}