#include <bits/stdc++.h>
unsigned int v[100005], dp[100005];
std :: vector <int> ans;
int main() {
    std :: ios_base :: sync_with_stdio(0);
    std :: ifstream fin("scmax.in");
    int n, i;
    fin >> n;
    for (i = 1; i <= n; ++ i)
        fin >> v[i];
    fin.close();
    dp[1] = 1;
    unsigned int maxx, j;
    for (i = 2; i <= n; ++ i) {
        maxx = 0;
        for (j = 1; j < i; ++ j)
            if (v[j] < v[i])
                maxx = std :: max(maxx, dp[j]);
        dp[i] = maxx + 1;
    }
    int pos = 1;
    for (i = 2; i <= n; ++ i)
        if (dp[pos] < dp[i])
            pos = i;
    std :: ofstream fout("scmax.out");
    fout << dp[pos] << '\n';
    int next_pos;
    ans.push_back(v[pos]);
    while (dp[pos] > 1) {
        next_pos = pos;
        for (i = pos - 1; i > 0; -- i)
            if (dp[i] + 1 == dp[pos] and v[i] < v[pos]) {
                next_pos = i;
                break;
            }
        pos = next_pos;
        ans.push_back(v[pos]);
    }
    while (!ans.empty()) {
        fout << ans.back() << ' ';
        ans.pop_back();
    }
    fout.close();
    return 0;
}