#include <bits/stdc++.h>
#define nmax 100005
using namespace std;
ifstream in("scmax.in");
ofstream out("scmax.out");
int n,a,dp[nmax],last[nmax],arb[4*nmax],sex[nmax];
pair<int,int> v[nmax];
void update(int st, int dr, int poz, int pz, int val){
    if(st>pz || dr<pz) return;
    if(st==pz){
        arb[poz] = pz;
        dp[pz] = val;
        return;
    }
    int mid = (st+dr)/2;
    update(st,mid,poz*2,pz,val);
    update(mid+1,dr,poz*2+1,pz,val);
    if(dp[arb[poz*2]]>=dp[arb[poz*2+1]]){
        arb[poz] = arb[poz*2];
    }
    else{
        arb[poz] = arb[poz*2+1];
    }
}
int fnd(int st, int dr, int poz, int a, int b){
    if(st>b || dr<a) return 0;
    if(st>=a && dr<=b) return arb[poz];
    int mid = (st+dr)/2;
    int e1 = fnd(st,mid,poz*2,a,b);
    int e2 = fnd(mid+1,dr,poz*2+1,a,b);
    if(dp[e1]>=dp[e2]){
        return e1;
    }
    else{
        return e2;
    }
}
void read(){
    in >> n;
    for(int i=1; i<=n; i++){
        in >> v[i].first;
        sex[i]=v[i].first;
        v[i].second = i;
    }
}
bool comp(pair<int,int> a, pair<int,int> b){
    if(a.first == b.first) return a.second>b.second;
    return a.first<b.first;
}
vector<int> sol;
void solve(){
    sort(v+1,v+n+1,comp);
    for(int i=1; i<=n; i++){
        int elem = fnd(0,n,1,0,v[i].second-1);
        last[v[i].second] = elem;
        update(0,n,1,v[i].second,dp[elem]+1);
    }
    out << dp[arb[1]] << '\n';
    int po = arb[1];
    for(;po!=0;po=last[po]){
        sol.push_back(po);
    }
    for(int i=sol.size()-1; i>=0; i--){
        out << sex[sol[i]] << ' ';
    }
}
int main()
{
    read();
    solve();
    return 0;
}