#include <stdio.h>

//Constante
const int sz = (int)1e5+1;
//Functii
void construct(int pos);

//Variabile
FILE *in,*out;

int elements, maxim=1, lastPosition;
int values[sz], best[sz], previous[sz];

int main()
{
    in=fopen("scmax.in","rt");
    out=fopen("scmax.out","wt");

    fscanf(in,"%d",&elements);
    for(int i=1; i<=elements; ++i)
        fscanf(in,"%d",&values[i]);

    for(int i=2; i<=elements; ++i)
        for(int j=1; j<i; ++j)
        {
            if(values[j] < values[i] && best[i] < best[j]+1)
            {
                best[i] = best[j]+1;
                previous[i] = j;
                if(best[i] > maxim)
                {
                    maxim = best[i];
                    lastPosition = i;
                }
            }
        }
    fprintf(out,"%d\n",maxim+1);
    construct(lastPosition);

    fclose(in);
    fclose(out);
    return 0;
}

void construct(int pos)
{
    if(previous[pos] != 0)
        construct(previous[pos]);
    fprintf(out,"%d ",values[pos]);
}