#include <bits/stdc++.h>

using namespace std;
ifstream in("scmax.in");
ofstream out("scmax.out");
int n,a[100100],v[100100],k,poz[100100],m,s[100100],up[100100],p,Max;
int main()
{
    in>>n;
    for(int i=1;i<=n;i++) in>>a[i];
    for(int i=1;i<=n;i++)
    {
        if(k==0) v[++k]=a[i],s[k]=1,poz[k]=1,up[k]=1;
        else
        {
            int st=1;
            int dr=k;
            p=0;
            while(st<=dr)
            {
                m=(st+dr)/2;
                if(v[m]<a[i]) {
                 dr=m-1;
                 p=m;
                }
                else st=m+1;
            }
            if(p) v[p]=a[i],s[p]++,poz[i]=up[p],up[p]=i;
            else v[++k]=a[i],s[k]=1,poz[i]=i,up[k]=i;
        }
    }
    for(int i=1;i<=k;i++) if(s[i]>Max) Max=s[i],p=up[i];
    out<<Max<<'\n';
    while(p!=poz[p])
    {
        out<<a[p]<<" ";
        p=poz[p];
    }
    out<<a[p];
    return 0;
}