#include <bits/stdc++.h>
using namespace std;
int v[100001],sc[100001];
pair <int,int> TONI_BO$$[100001];
vector <int> rez;
int main()  {
    int n,i,k,pas,z;
    freopen("scmax.in","r",stdin);
    freopen("scmax.out","w",stdout);
    scanf("%d",&n);
    for(i=1; i<=n; i++)
        scanf("%d",&v[i]);
    k=1;
    sc[1]=1;
    TONI_BO$$[1]={1,0};
    for(i=2; i<=n; i++)
    {
        pas=1<<16;
        z=0;
        while(pas)
        {
            if(z+pas<=k && v[sc[z+pas]]<v[i])
                z+=pas;
            pas/=2;
        }
        TONI_BO$$[i]={z+1,sc[z]};
        sc[++z]=i;
        if(z>k)
            k=z;
    }
    k=0;
    for(i=1; i<=n; i++)
        k=max(k,TONI_BO$$[i].first);
    for(i=1; i<=n; i++)
        if(k==TONI_BO$$[i].first)
            break;
    printf("%d\n",k);
    while(i>0)
    {
        rez.push_back(v[i]);
        i=TONI_BO$$[i].second;
    }
    for(i=rez.size()-1; i>=0; i--)
        printf("%d ",rez[i]);

	return 0;
}