#include <stdio.h>
using namespace std;
long j,i,N,crt,nr[100001],max[100001],next[100001],gmax,sf;
 
int main ()
{
    freopen("scmax.in", "r", stdin);
    freopen("scmax.out", "w", stdout);
    scanf("%d", &N);
    for (i=1; i<=N; i++)
    {
        scanf("%d", &nr[i]);
    }
    for (i=N; i>=1; i--)
    {
        max[i]=1;
        gmax=0;
        for (j=N; j>=i+1; j--)
            if (nr[i]<nr[j] && max[j]>max[gmax]) gmax=j;
        if (gmax) max[i]=max[gmax]+1;
        if (max[i]>max[sf]) sf=i;
        next[i]=gmax;
    }
    printf("%d\n", max[sf]);
    crt=nr[sf];
    for (i=sf; next[i]; i=next[i]) printf("%d ", nr[i]);
    printf("%d", nr[i]);
    //printf("\n");
    //for (i=1; i<=N; i++) printf("%d ", next[i]);
    return 0;
}