#define _CRT_SECURE_NO_WARNINGS 1
#include <fstream>
#include <string>
#include <algorithm>
#include <map>
#include <vector>
#define ll long long
using namespace std;
ifstream cin("scmax.in");
ofstream cout("scmax.out");

int n;
int v[100001];
int dp[100001];
int main()
{
    ios_base::sync_with_stdio(false);
    cin >> n;
    for (int i = 1; i <= n; i++)
    {
        cin >> v[i];
        dp[i] = 2e9;
    }
    for (int i = 1; i <= n; i++)
    {
        /*for (int j = 1; j <= n; j++)
        {
            if (dp[j - 1] < v[i] && v[i] < dp[j])
                dp[j] = v[i];
        }*/
        int l = 1, r = n;
        while (l < r)
        {
            int mid = (l + r) / 2;
            if (dp[mid] < v[i])
                l = mid+1;
            else
                r = mid;
        }
        if (dp[l - 1] < v[i] && v[i] < dp[l])
            dp[l] = v[i];
    }

    int ans = 0;
    for (int i = 1; i <= n; i++)
    {
        if (dp[i] < 2e9)
            ans = i;
    }
    cout << ans << '\n';
    for (int i = 1; i <= n; i++)
    {
        if (dp[i] < 2e9)
            cout << dp[i] << ' ';
    }
    return 0;
}