#include<stdio.h>
FILE *in,*out;
using namespace std;
int v[100001],d[100001],w[100001];
int n,i,j,maxi;
int main()
{
    in=fopen("scmax.in","rt");
    out=fopen("scmax.out","wt");
    int i,j,maxi=0,n;
    fscanf(in,"%d",&n);
    for(i=1;i<=n;i++)
    fscanf(in,"%d",&v[i]);
    for(i=n-1;i>=1;i--)
    for(j=i+1;j<=n;j++)
        if(v[i]<v[j]&&w[i]<w[j]+1)
        {
            w[i]=w[j]+1;
            d[i]=j;
            if(w[i]>w[maxi])maxi=i;
        }
    fprintf(out,"%d\n",w[maxi]+1);
    fprintf(out,"%d ",v[maxi]);
    while(w[maxi])
    {
        maxi=d[maxi];
        fprintf(out,"%d ",v[maxi]);
    }
    fclose(in);
    fclose(out);
    return 0;
}