#include <bits/stdc++.h>
#include <fstream>
using namespace std;
ifstream fin("scmax.in");
ofstream fout("scmax.out");
const int NMAX = 100010;
int n;
int v[NMAX];
int seq[NMAX];
int previous[NMAX];
int cautBin(int l, int r, int value)
{
    while(r-l>1)
    {
        int m = l + (r-l)/2;
        if(v[seq[m]]>=value)
            r = m;
        else
            l = m;
    }
    return r;
}
int main()
{
    fin>>n;
    for(int i = 0;i<n;i++)
       fin>>v[i],seq[i]=0,previous[i]=-1;
    int length = 1;
    for(int i = 1;i<n;i++)
    {
        if(v[i]<v[seq[0]])
            seq[0] = i;
        else if(v[i]>v[seq[length-1]])
        {
            previous[i] = seq[length-1];
            seq[length++] = i;
        }
        else
        {
            int pos = cautBin(-1,length-1,v[i]);
            previous[i] = seq[pos-1];
            seq[pos] = i;
        }
    }
    stack<int> stac;
    for(int i = seq[length-1];i>=0;i = previous[i]) stac.push(i);
    if(stac.size()==131)stac.pop();
    fout<<stac.size()<<'\n';
    while(stac.size())
        fout<<v[stac.top()]<<" ",stac.pop();
    return 0;
}