#include <bits/stdc++.h>

using namespace std;

ifstream fin("scmax.in");
ofstream fout("scmax.out");
int n, v[100002], b[100002], p[100002];
int ma, k, l[100002], nr = 1, poz, i;

static inline void Afis(int i) {
    if(p[i] > 0)  Afis(p[i]);
    fout << v[i] << " ";
}

static inline int Cb(int val) {
    int st = 0, dr = nr;
    while(st <= dr) {
        int mij = st + (dr - st) / 2;

        if(v[l[mij]] < val && val <= v[l[mij + 1]]) return mij;
        else if(v[l[mij + 1]] < val) st = mij + 1;
        else dr = mij - 1;
    }
    return nr;
}

int main () {
    fin >> n;
    for(i = 1; i <= n; i++) fin >> v[i];
    b[1] = l[1] = 1;
    l[0] = 0;

    for(i = 2; i <= n; i++) {
        poz = Cb(v[i]);
        p[i] = l[poz];
        b[i] = poz + 1;
        l[poz + 1] = i;
        nr = max(nr, poz + 1);
    }

    ma = 0;
    poz = 0;
    for(i = 1; i <= n; i++) {
        if(ma < b[i]) {
            ma = b[i];
            poz = i;
        }
    }
    fout << ma << "\n";
    Afis(poz);

    return 0;
}