#include <bits/stdc++.h>

using namespace std;
int l[100001],ant[100001],a[100001],maxim,pozmax;
ofstream g("scmax.out");
bool scrie(int i)
{
    if(l[i] == 0)
    {
        return true;
    }
    else
    {
        scrie(ant[i]);
        g<<a[i]<<" ";
    }
}

int main()
{
    ifstream f("scmax.in");
    int n;
    f>>n;
    for(int i=1;i<=n;++i)
        f>>a[i];
    l[1] = 1;
    ant[1] = 0;
    for(int i=2;i<=n;++i)
    {
        int m=0, p = 0;
        for(int j=1;j<=i-1;++j)
            if(a[i] > a[j] && l[j] > m)
                {
                    m = l[j];
                    p = j;
                }
        l[i] = m+1;
        ant[i] = p;
    }
    for(int i=1;i<=n;++i)
        if(l[i] > maxim)
            {
                maxim = l[i];
                pozmax = i;
            }
    g<<maxim<<'\n';
    scrie(pozmax);
    return 0;
}