#include <bits/stdc++.h>
#define st first
#define nd second
#define pb push_back
#define mp make_pair
#define ll long long
#define INF LLONG_MAX
using namespace std;
ifstream fin( "scmax.in" );
ofstream fout( "scmax.out" );
int n;
ll a[100005];
ll dp[100005];
ll best[100005],v;
vector<ll>sol;
ll ok(ll pos, ll x)
{
    if(best[pos]<x)
        return 1;
    return 0;
}
ll cb(ll x)
{
    ll  l=0,r=v+1;
    while(l!=r)
    {
        ll mid=(l+r)/2;
        if(ok(mid,x))
            l=mid+1;
        else
            r=mid;
    }
    return l;
}
int main()
{
    fin>>n;
    for(int i=1;i<=n;i++)
        fin>>a[i];
    best[1]=a[1];
    dp[1]=1;
    v=1;
    for(int i=2;i<=n;i++)
    {
        ll pos=cb(a[i]);
        dp[i]=pos;
        best[pos]=a[i];
        v=max(v,pos);
    }
    fout<<v<<'\n';
    for(int i=n;i>=1&&v>0;i--)
        if(v==dp[i])
        {
            sol.pb(a[i]);
            v--;
        }
    reverse(sol.begin(),sol.end());
    for(auto it : sol)
        fout<<it<<' ';

    return 0;
}