#include <fstream>
using namespace std;

ifstream fin("scmax.in");
ofstream fout("scmax.out");

int n, m, i, j, k, ok, minim, maxim;
int v[100001], l[100001], t[100001];
int maximt, maximp, p;

void afisare(int val){
    if(val != 0){
        afisare(t[val]);
        fout << v[val] << " ";
    }
    else
        return;
}

int main(){
    fin >> n;
    for(i = 1; i <= n; i ++)
        fin >> v[i];
    l[1] = 1;
    t[1] = 0;
    for(i = 2; i<= n; i ++){
        maxim = 0;
        p = 0;
        for(j = 1; j < i; j ++){
            if(l[j] > maxim && v[j] < v[i]){
                maxim = l[j];
                p = j;
            }
        }
        l[i] = maxim + 1;
        t[i] = p;
        if(l[i] > maximt){
            maximt = l[i];
            maximp = i;
        }
    }
    fout << maximt << endl;
    afisare(maximp);

    return 0;
}