#include <bits/stdc++.h>
#define mod 1999999973

using namespace std;

ifstream fin("scmax.in");
ofstream fout("scmax.out");
int n, a[100002], l[100002], poz[100002], i, j, m, r, p;

int main() {
    ios_base::sync_with_stdio(false);
    fin.tie(NULL);
    fin >> n >> a[1];
    l[1] = 1;
    poz[1] = 0;
    for(i = 2; i <= n; i++) {
        fin >> a[i];
        m = 0;
        poz[i] = 0;
        for(j = i - 1; j >= 1; j--) {
            if(a[j] < a[i]) {
                if(l[j] > m) {
                    m = l[j];
                    poz[i] = j;
                }
            }
        }
        l[i] = m + 1;
        if(r < l[i]) {
            r = l[i];
            p = i;
        }
    }
    fout << r << "\n";
    m = 0;
    i = p;
    while(i) {
        l[++m] = a[i];
        i = poz[i];
    }
    while(m) fout << l[m--] << " ";

    return 0;
}