#include <bits/stdc++.h>

using namespace std;
using ll = long long;

int main()
{
    ll x, y;
    cin >> x >> y;
    map<ll, ll> z2;
    while (y-- > 0)
    {
        ll a;
        cin >> a;
        z2[a] += 1;
    }
    vector<ll> z1(x);
    ll ans = 0;
    for (auto iz : z2)
    {
        z1.at(iz.first) += 1;
        ans += 1;
    }

    for (int i = 0; i < x; i++)
    {
        if (z1.at(i) == 0)
        {
            cout << i << endl;
        }
    }
    cout << "Mario got " << ans << " of the dangerous obstacles." << endl;
    return 0;
}