// #include <bits\stdc++.h>
#include <iostream>
#include <map>
#include <vector>

#ifdef LOCAL
#define dbg(x) cerr << #x << " = " << (x) << endl;
#else
#define dbg(x)
#endif
#define int long long
#define endl "\n"
#define x first
#define y second
#define len(x) ((int)(x).size())

using namespace std;

void solve(); signed main() {
#ifdef LOCAL
    freopen("input.txt", "r", stdin);
    freopen("output.txt", "w", stdout);
#else
    // freopen("loganqueries.in", "r", stdin);
    // freopen("loganqueries.out", "w", stdout);
#endif
    ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
    cout.setf(ios::fixed); cout.precision(15);
    solve();
}

const int INF = 1e18, MAXN = 3e5 + 10, MOD = 1e9 + 7;
vector<int> lcp;
vector<int> p, c;

vector<int> calc_lcp(vector<int> &val, vector<int> &c, vector<int> &p) {
    int n = len(val);
    int current_lcp = 0;
    vector<int> lcp(n);
    for (int i = 0; i < n; i++) {
        if (c[i] == n - 1)
            continue;
        int nxt = p[c[i] + 1];
        while (max(i, nxt) + current_lcp < n && val[i + current_lcp] == val[nxt + current_lcp])
            current_lcp++;
        lcp[c[i]] = current_lcp;
        current_lcp = max(0ll, current_lcp - 1);
    }
    return lcp;
}

vector<int> suffix_array(vector<int> &s) {
    s.push_back(0);
    int n = len(s),cnt = 0, cls = 0;
    c.resize(n), p.resize(n);

    map<int, vector<int>> t;
    for (int i = 0; i < n; i++)
        t[s[i]].push_back(i);

    for (auto &x : t) {
        for (int u : x.y)
            c[u] = cls, p[cnt++] = u;
        cls++;
    }

    for (int l = 1; cls < n; l++) {
        vector<vector<int>> a(cls);
        vector<int> _c(n);
        int d = (1 << l) / 2;
        int _cls = cnt = 0;

        for (int i = 0; i < n; i++) {
            int k = (p[i] - d + n) % n;
            a[c[k]].push_back(k);
        }

        for (int i = 0; i < cls; i++) {
            for (int j = 0; j < len(a[i]); j++) {
                if (j == 0 || c[(a[i][j] + d) % n] != c[(a[i][j - 1] + d) % n])
                    _cls++;
                _c[a[i][j]] = _cls - 1;
                p[cnt++] = a[i][j];
            }
        }

        c = _c;
        cls = _cls;
    }

    lcp = calc_lcp(s, c, p);
    return vector<int>(p.begin() + 1, p.end());
}

void solve() {
    int n, m;
    cin >> n >> m;
    vector<int> a(n);
    for (int i = 0; i < n; ++i) {
        cin >> a[i];
    }

    vector<int> sm = suffix_array(a);

    // for (auto it: lcp) {
    //     cerr << it << " ";
    // }
    // cerr << endl;

    vector<int> ind1, ind2;
    vector<int> bl(n, -1), br(n, -1);
    for (int i = 0; i < n + 1; ++i) {
        while (ind1.size() > 0 && lcp[ind1.back()] > lcp[i]) {
            br[ind1.back()] = i;
            ind1.pop_back();
        }
        ind1.push_back(i);
        while (ind2.size() > 0 && lcp[ind2.back()] > lcp[n - i - 1]) {
            bl[ind2.back()] = n - i - 1;
            ind2.pop_back();
        }
        ind2.push_back(n - i - 1);
    }

    int ans = n, id = 0, ll = n;
    for (int i = 1; i < n; ++i) {
        int k = lcp[i];
        int l = bl[i], r = br[i];

        if (l == -1 || r == -1) {
            continue;
        }

        l++;
        // cerr << l << " " << r << " " << k << endl;

        if (ans < (r - l + 1) * k) {
            ans = (r - l + 1) * k;
            id = p[i];
            ll = (r - l + 1);
        }
    }

    cout << ans << endl;
    cout << ll << endl;
    for (int i = id; i < min(n, ll + id); ++i) {
        cout << a[i] << " ";
    }
}