#include <fstream>

using namespace std;

#pragma GCC optimize ("Ofast")

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

int pow2, ans, n, v[100005], dp[100005], s[100005], cap, afis;

int cautbin(int x)
{
    int sol = 0;
    for(int i = pow2; i > 0;  i >>= 1)
    {
        if(sol + i <= n && s[sol + i] > x)
            sol += i;
    }
    return sol + 1;
}

int main()
{
    ios_base::sync_with_stdio(false);
    fin >> n;
    pow2 = 1;
    while(pow2 * 2 <= n)
        pow2 *= 2;
    for(int i = 1; i <= n; i++)
        fin >> v[i];
    for(int i = n; i > 0; i--)
    {
        int poz = cautbin(v[i]);
        dp[i] = poz;
        s[poz] = max(s[poz], v[i]);
        if(dp[i] >= ans)
        {
            ans = dp[i];
            cap = i;
        }
    }
    fout << ans << '\n';
    fout << v[cap] << ' ';
    for(int i = 1; i <= n; i++)
    {
        if(v[i] > v[cap] && dp[i] == dp[cap] - 1)
        {
            cap = i;
            fout << v[cap] << ' ';
        }
    }
    return 0;
}