#include <bits/stdc++.h>
using namespace std;
#define int long long
int v[100005];
vector<int>ras;
int32_t main()
{
    ifstream cin ("scmax.in")
    ofstream cout ("scmax.out");
    
    int n;
    cin >> n;
    for(int i=1; i<=n; i++)
        cin >> v[i];
    ras.push_back(v[1]);
    
    for(int i=2; i<=n; i++)
    {
        if(v[i]>ras.back())
            ras.push_back(v[i]);
        else
        {
            int st=lower_bound(ras.begin(), ras.end(), v[i])-ras.begin();
            ras[st]=v[i];
        }
    }
    cout << ras.size() << '\n';
    for(auto i : ras)
        cout << i << ' ';
    return 0;
}