#include <iostream>
#include <fstream>

using namespace std;

ifstream fin("scmax.in");
ofstream fout("scmax.out");

int n,s[100001],dp[100001];

void citire()
{
    fin>>n;
    for(int i=1;i<=n;i++)
        fin>>s[i];
}

void pos()
{
    int mx=-1;
    for(int i=n;i>0;i--)
    {
        dp[i]=1;
        for(int j=i+1;j<=n+1;j++)
            if(s[i]<s[j])
        {
            dp[i]=max(dp[i],dp[j]+1);
            mx=max(mx,dp[i]);
        }
    }
    fout<<mx<<endl;
    for(int i=1;i<=n;i++)
    {
        if(dp[i]==mx)
        {
            fout<<s[i]<<" ";
            mx=mx-1;
        }
    }
}

int main()
{
    citire();
    pos();
    return 0;
}