#include <bits/stdc++.h>

using namespace std;
int maxim,l[100000],pozmax=0,sol[100000];
int main()
{
    ifstream f("scmax.in");
    ofstream g("scmax.out");
    int n,a[100000];
    f>>n;
    for(int i=0;i<n;++i)
        f>>a[i];
    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])
        {
            pozmax = i;
            maxim = l[i];
        }
    }
    g<<maxim<<'\n';
    int current = maxim;
    for(int i=pozmax;i>=0;--i)
    {
        if(current == 0)
            break;
        if(l[i] == current)
        {
            sol[current-1] = a[i];
            --current;
        }
    }
    for(int i=0;i<maxim;++i)
        g<<sol[i]<<" ";
    f.close();
    g.close();
    return 0;
}