#include <bits/stdc++.h>
using namespace std;
ifstream fin("scmax.in");
ofstream fout("scmax.out");
int n,maxx,p,a[100005],dp[100005],succ[100005];
void Citire()
{
    fin>>n;
    for (int i=1;i<=n;i++)
        fin>>a[i];
}
void Rezolvare()
{
    dp[n]=1;
    succ[n]=-1;
    for (int i=n;i>=1;i--)
    {
        dp[i]=1;
        succ[i]=-1;
        for (int j=i+1;j<=n;j++)
            if (a[i]<a[j] && dp[i]<dp[j]+1)
            {
                dp[i]=dp[j]+1;
                succ[i]=j;
                if (dp[i]>maxx) {maxx=dp[i];p=i;}
            }
    }
}
void Afisare()
{
    fout<<maxx<<'\n';
    int i=p;
    while(i!=-1)
    {
        fout<<a[i]<<" ";
        i=succ[i];
    }
}
int main()
{
    Citire();
    Rezolvare();
    Afisare();
    return 0;
}