#include <bits/stdc++.h>
using namespace std;
ifstream fin("scmax.in");
ofstream fout("scmax.out");
int main()
{
    int n,minval=1000001;
    fin>>n;
    vector<int> v(n+1,0);
    vector<int> dp(n+1,0);
    vector<int> T(n+1,0);
    dp[1]=1;
    T[1]=1;
    for(int i=1;i<=n;i++)
    {
        fin>>v[i];
    }
    for(int i=1;i<=n;i++)
    {
        int pos=0;
        for(int j=1;j<i;j++)
        {
            if(v[j]<v[i] && dp[j]>dp[pos])
            {
                pos=j;
            }
        }
        dp[i]=1+dp[pos];
        T[i]=pos;
    }
    int pos=1;
    for(int i=2;i<=n;i++)
    {
        if(dp[pos]<dp[i])
        {
            pos=i;
        }
    }
    vector<int> sol;
    while(pos != 0)
    {
        sol.push_back(pos);
        pos=T[pos];
    }
    reverse(sol.begin(),sol.end());
    fout<<sol.size()<<"\n";
    for(int i=0;i<sol.size();i++)
    {
        fout<<v[sol[i]]<<" ";
    }
    fout<<"\n";
    return 0;
}