#include<iostream>
#include<fstream>
#include<vector>
#include<algorithm>
using namespace std;

ifstream f("scmax.in");
ofstream g("scmax.out");

int n;
vector<long long> ans;
long long v[100005];

int main()
{
    f>>n;
    for(int i=1;i<=n;i++)
    {
        f>>v[i];
    }
    ans.push_back(v[1]);
    for(int i=2;i<=n;i++)
    {   
        if(v[i] > ans[ans.size()-1])
            ans.push_back(v[i]);
        else
        {
            auto it = upper_bound(ans.begin(),ans.end(),v[i]);
            *it = v[i];
        }
    }
    g<<ans.size()<<"\n";
    for(int i=0;i<ans.size();i++)
        g<<ans[i]<<" ";
}