#include <iostream>
#include <cstdio>
using namespace std;

int n,v[100010],sol[100010],poz[100010],k=1,pozmax=1;

void citire()
{
    scanf("%d",&n);
    for (int i=1;i<=n;++i)
        scanf("%d",&v[i]);

}
int caut(int nr)
{
    int st=1,dr=k;
    while(st<=dr)
    {
        int mij=(st+dr)/2;
        if (sol[mij]<nr)
            st=mij+1;
        else
            dr=mij-1;
    }
    return dr+1;
}
void afis(int i)
{
    if (poz[i]>1)
        for (int j=i-1;j>=1;--j)
            if(poz[j]==poz[i]-1 && v[j]<v[i])
                {
                    afis(j);
                    break;
                }
    printf("%d ",v[i]);
}
int main()
{
    freopen("scmax.in","r",stdin);
    freopen("scmax.out","w",stdout);
    citire();
    poz[1]=1;
    sol[1]=v[1];
    for (int i=2;i<=n;i++)
    {
        int poziz=caut(v[i]);
        poz[i]=poziz;
        sol[poziz]=v[i];
        if (poziz>k)
            {
                ++k;
                pozmax=i;
            }
    }
    printf("%d\n",k);
    afis(pozmax);
    return 0;
}