#include <bits/stdc++.h>
 
using namespace std;
int maxim, pozmax;
int main()
{
    int n;
    ifstream f("scmax.in");
    ofstream g("scmax.out");
    f>>n;
    int a[100001];
    for(int i=0;i<n;++i)
        f>>a[i];
    int l[100001],sol[100001];
    l[0] = 1;
    for(int i=1;i<n;++i)
    {
        int maxi =0;
        for(int j=0;j<=i-1;++j)
            if(a[i]>a[j] && maxi<l[j]) maxi = l[j];
        l[i] = maxi + 1;
        if(maxim < l[i])
        {
            maxim = l[i];
            pozmax = i;
        }
    }
    g<<maxim<<'\n';
    int cmaxim = maxim;
    for(int i=pozmax;i>=0;--i)
    {
        if(l[i] == maxim)
            {
                sol[maxim-1] = a[i];
                --maxim;
            }
    }
    for(int i=0;i<cmaxim;++i)
        g<<sol[i]<<" ";
    return 0;
}