#include <fstream>

using namespace std;

ifstream f("scmax.in");
ofstream g("scmax.out");

int n, i, v[100003], lg[100003], Max, u[100003], j;

int main()
{
    f>>n;
    for(i=1; i<=n; i++)
        f>>v[i];
    lg[n] = 1;
    for(i=n-1; i>=1; i--) {
        Max = 0;
        for(j=i+1; j<=n; j++)
            if(lg[j]>Max and v[j]>v[i]) Max = lg[j], u[i] = j;
        lg[i] = Max+1;
    } Max = 0;
    for(i=1; i<=n; i++)
        if(lg[i]>Max) Max=lg[i], j = i;
    g<<Max<<'\n';
    while(j) {
        g<<v[j]<<' ';
        j = u[j];
    }
    return 0;
}