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#include <fstream>

using namespace std;
int v[100001], t[100001], dp[100001];
int sol, u;

ifstream cin ("scmax.in");
ofstream cout ("scmax.out");
void drum (int n) {
    if (n) {
        drum (t[n]);
        cout << v[n] << " ";
    }
}
int main()
{
    int n;
    cin >> n;
    for (int i = 1; i <= n; i++) {
        cin >> v[i];
    }
    
    for (int i = 1; i <= n; i++) {
        
        int maxi = 0, poz;
        for (int j = 1; j < i; j++) {
            
            if (v[i] > v[j] && dp[j] > maxi) {
            
                maxi = dp[j];
                poz = j;
            }
            
        }
        
        dp[i] = maxi + 1;
        if (maxi == 0) {
            t[i] = 0;
        } else t[i] = poz;
        
        
        if (dp[i] > sol) {
            sol = dp[i];
            u = i;
        }
    }
    
    cout << sol << '\n';
    drum (u);
    return 0;
}