#include<stdio.h>
using namespace std;
int v[100005],lung[100005],contor[100005],sol[100005];
int cauta(int a)
{
    for(int i=1;i<=lung[0];++i)
        if(a<=lung[i]) return i;
    return ++lung[0];
}
int main()
{
    int N,maxim=0,ind=1;
    freopen("scmax.in","r",stdin);
    freopen("scmax.out","w",stdout);
    scanf("%d",&N);
    for(int i=1;i<=N;++i)
        scanf("%d",&v[i]);
    lung[++lung[0]]=v[1];
    contor[1]=1;
    for(int i=2;i<=N;++i){
        int variabila;
        lung[(variabila=cauta(v[i]))]=v[i];
        contor[i]=variabila;
        if(variabila>maxim){
            ind=i;
            sol[0]=(maxim=variabila);
        }
    }
    N=maxim;
    printf("%d\n",maxim);
    for(;ind;ind--){
        if(contor[ind]==maxim){
            maxim--;
            sol[sol[0]--]=v[ind];
        }
    }
    for(int i=1;i<=N;++i)
        printf("%d ",sol[i]);
    fclose(stdin);fclose(stdout);
    return 0;
}