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


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


int n,ans;
int v[100005];
bool o[100005];
int dp[100005];


int main()
{
    fin>>n;
    for(int i=1;i<=n;i++)
        fin>>v[i];
    for(int i=1;i<=n;i++)
        for(int j=i+1;j<=n;j++)
            if(v[j]>v[i])
            {
                dp[j]=max(dp[j],dp[i]+1);
                ans=max(dp[j],ans);
            }
    fout<<ans+1<<"\n";
    for(int i=n;i>=1;i--)
        if(dp[i]==ans)
        {
            o[i]=1;
            ans--;
            if(ans==(-1)) break;
        }
    for(int i=1;i<=n;i++)
        if(o[i])fout<<v[i]<<" ";
    return 0;
}