#include <cstdio>
using namespace std;
int v[100007],q[100007],d[100007],tata[100007],sol[100007];
int main()
{
    freopen("scmax.in","r",stdin);
    freopen("scmax.out","w",stdout);
    int n,nr=0;
    scanf("%d",&n);
    for(int i=1;i<=n;i++) scanf("%d",&v[i]);
    for(int i=1;i<=n;i++)
    {
        int st=1,dr=nr;
        while(st<=dr)
        {
            int mid=(st+dr)/2;
            if(v[q[mid]]>=v[i]) dr=mid-1;
            else st=mid+1;
        }
        d[i]=d[q[st-1]]+1;
        tata[i]=q[st-1];
        if(st==nr+1) nr++;
        q[st]=i;
    }
    int poz=0,cnt=0;
    for(int i=1;i<=n;i++)
        if(d[i]>d[poz]) poz=i;
    for(int i=poz;i>0;i=tata[i]) sol[++cnt]=v[i];
    printf("%d\n",cnt);
    for(int i=cnt;i;i--) printf("%d ",sol[i]);
}