#include<fstream>
using namespace std;

ifstream cin ("scmax.in");
ofstream cout("scmax.out"); 

int main()
{
    int v[1001], dp[1001], n, from[1001], lastpos = 0;
    int maxx = 0;
    cin >> n;
    for(int i = 1; i <= n; i++)
        cin >> v[i];
    for(int i = 1; i <= n; i++)
    {
        dp[i] = 1;
        from[i] = 0;
        for(int j = 1; j <= i - 1; j++)
        {
            if(v[i] > v[j])
            {
                if(dp[i] < dp[j] + 1)
                {
                    dp[i] = dp[j] + 1;
                    from[i] = j;    
                }
            } 
        }

        
        if(dp[i] > maxx)
        {
            maxx = dp[i];
            lastpos = i;
        }   
    }

    cout << maxx << "\n";
    int rasp[1001], k = 1;
    int current = lastpos;
    while(current != 0)
    {
        rasp[k] = v[current];
        k++;
        current = from[current];
    }

    for(int i = k - 1; i >= 1; i--)
        cout << rasp[i] << " ";

}