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#include <bits/stdc++.h>

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

const int N = 100001;
int v[N], drum[N], tati[N];

void constrdrum(int u) {
    if (u != 0) {
        constrdrum(tati[u]);
        fout << v[u] << " ";
    }    
}

int n, i, j, maxi, sol, p, u;
int main()
{
    fin >> n;
    for (int i = 1; i <= n; i++) {
        fin >> v[i];
    }
    drum[1] = 1;
    for (int i = 2; i <= n; i++) {
        maxi = 0;
        for (int j = 1; j < i; j++) {
            if (drum[j] > maxi && v[j] < v[i]) {
                maxi = drum[j];
                p = j;
            }
        }    
        drum[i] = maxi + 1;
        if (drum[i] != 1) tati[i] = p;
        else tati[i] = 0;
            
        if (drum[i] > sol) {
            sol = drum[i];
            u = i;
        }
    }
    
    fout << sol << '\n';
    constrdrum(u);
    return 0;
}