#include <iostream>
#include <fstream>
using namespace std;
ifstream fin("scmax.in");
ofstream fout("scmax.out");

int v[100001], t[100001], dp[100010];

int cautbin(int st, int dr, int x)
{
    while(st<=dr)
    {
        int mid=(st+dr)/2;
        if(x>v[dp[mid]])
        {
            st=mid+1;
        }
        else
        {
            dr=mid-1;
        }
    }
    return st;
}

void reconst_drum(int u)
{
    if(u!=0)
    {
        reconst_drum(t[u]);
        fout<<v[u]<<" ";
    }
}

int main()
{
    int n, i, j, sol=0, k, crt;
    fin>>n;
    for(i=1;i<=n;i++)
    {
        fin>>v[i];
    }
    k=1;
    dp[1]=1;
    t[1]=0;
    for(i=2;i<=n;i++)
    {
        int crt=cautbin(1, k, v[i]);
        if(crt>k)
        {
            k++;
            dp[k]=i;
            t[i]=dp[k-1];
        }
        else
        {
            dp[crt]=i;
            t[i]=dp[crt-1];
        }
    }
    fout<<k<<"\n";
    reconst_drum(dp[k]);
    return 0;
}