#include<fstream>

using namespace std;

ifstream cin("scmax.in");
ofstream cout("scmax.out");

int sol[200010],n,poz[200010],nrmax,v[200010];

int main () {
cin>>n;
for(int i=1;i<=n;i++)
    cin>>v[i];
sol[1]=v[1];
nrmax=1;
poz[1]=1;
for(int i=2;i<=n;i++){
    int st=1,dr=nrmax,pozc=-1;
    while(st<=dr){
        int mij=(st+dr)/2;
        if(v[i]>sol[mij])
            st=mij+1;
        else{
            pozc=mij;
            dr=mij-1;
        }
    }
    if(pozc==-1){
        nrmax++;
        sol[nrmax]=v[i];
        poz[i]=nrmax;
    }
    else{
        sol[pozc]=v[i];
        poz[i]=pozc;
    }
}
cout<<nrmax<<endl;
for(int i=1;i<=nrmax;i++)
    cout<<sol[i]<<" ";
return 0;
}