#include <bits/stdc++.h>
#define ll long long
#define sz(x) (int)(x).size()
#define LSB(a) ((-a) & a)
using namespace std;

#ifdef LOCAL
#define read() ifstream fin("date.in.txt");
#else
#define read() ifstream fin("scmax.in"); ofstream fout("scmax.out");
#endif // LOCAL

const int N = 100005;
int n, AIB[N];
int v[N];
int posAct[N];
map<int,int> idx;
map<int,int> element;
set<int> vals;
int from[N];

int searchMax(int pos, int val) {
    int pMax = 0;
    while(pos > 0) {

        if(AIB[pMax] < AIB[pos] && v[posAct[pos]] < val)
            pMax = pos;

        pos -= LSB(pos);
    }
    return pMax;
}

void update(int pos, int val, int idxAct, int idxPrecedent) {
    while(pos <= n) {

        if(AIB[pos] <= val) {
            AIB[pos] = val;
            posAct[pos] = idxAct;
        }

        pos += LSB(pos);
    }
}


int main() {
    read();
    fin >> n;

    for (int i = 1; i <= n; ++i) {
        fin >> v[i];
        vals.insert(v[i]);
    }

    int p = 1;
    for (int x : vals) {
        element[p] = x;
        idx[x] = p++;
    }

    for (int i = 1; i <= n; ++i) {
        int posSecvMax = searchMax(idx[v[i]], v[i]);

        //cout << posSecvMax << " " << v[i] << '\n';
        from[i] = posAct[posSecvMax];
        update(idx[v[i]], AIB[posSecvMax] + 1, i, posAct[posSecvMax]);

        /*for (int j = 1; j <= n; ++j) {
            cout << AIB[j] << " ";
        }
        cout << '\n';
        for (int j = 1; j <= n; ++j) {
            cout << posAct[j] << " ";
        }
        cout << '\n';
        for (int j = 1; j <= n; ++j) {
            cout << from[j] << " ";
        }
        cout << '\n';
        cout << '\n';
        */
    }

    int act = searchMax(n, INT_MAX);
    vector<int> sol;
    #ifdef LOCAL
    cout << AIB[act] << '\n';
    act = posAct[act];
    while(act != 0) {
        sol.push_back(v[act]);
        act = from[act];
    }
    reverse(sol.begin(), sol.end());
    for (int x: sol) {
        cout << x << " ";
    }
    cout << '\n';
    #else
    fout << AIB[act] << '\n';
    act = posAct[act];
    while(act != 0) {
        sol.push_back(v[act]);
        act = from[act];
    }
    reverse(sol.begin(), sol.end());
    for (int x: sol) {
        fout << x << " ";
    }
    #endif // LOCAL

    return 0;
}