#include <bits/stdc++.h>

using namespace std;
ifstream fin ("scmax.in");
ofstream fout("scmax.out");
const int nmax = 100000 + 50;
long long n, v[nmax], dp[nmax], smax, poz, ans[nmax];
int main()
{
    fin >> n;
    for (int i = 1; i <= n; ++i) {
        fin >> v[i];
    }

    for (int i = 2; i <= n; ++i) {
        dp[i] = 1;
        for (int j = i - 1; j >= 1; --j) {
            if(v[j] < v[i]) {
                dp[i] = max (dp[i], dp[j] + 1);
            }
        }
        if (dp[i] > smax) {
            smax = dp[i];
            poz = i;
        }
    }

    fout << smax << '\n';
    int m = smax;
    for (int i = poz; i >= 1 && smax; --i) {
        if (dp[i] == smax) {
            ans[smax--] = v[i];
        }
    }

    for (int i = 1; i <= m; ++i) {
        fout << ans[i] << ' ';
    }
    return 0;
}