#include <bits/stdc++.h>

using namespace std;
ifstream in("scmax.in");
ofstream out("scmax.out");
struct ura{
    int nr,poz;
}v[100005];

bool ord(ura a, ura b){
    return a.nr<b.nr;
}

int sir[100005],dp[100001];
int main()
{
    int n,i,j=0;
    in>>n;
    for(i=1;i<=n;++i)
        {
        in>>v[i].nr;
        v[i].poz=i;
        }
    sir[++j]=v[1].nr;
    dp[1]=1;
    for(i=2;i<=n;++i)
    {
        if(v[i].nr>sir[j]){

            sir[++j]=v[i].nr;
            dp[i]=j;
        }
        else{
            int st=1;
            int dr=j;
            int ans=1;
            while(st<=dr){
                int mid=(st+dr)/2;
                if(v[i].nr>sir[mid])
                    st=mid+1;
                else{
                    ans=mid;
                    dr=mid-1;
                }
            }
            sir[ans]=v[i].nr;
            dp[i]=ans;
        }
    }
    out<<j<<'\n';
    j=1;
    sort(v+1,v+n+1,ord);
    for(i=1;i<=n;++i)
        if(dp[v[i].poz]==j){
            out<<v[i].nr<<" ";
            ++j;
        }
    return 0;
}