/* Problem URL: https://codeforces.com/gym/104020/problem/K */ #include using namespace std; #define V vector #define rmin(a, b) a = min(a, b) #define rmax(a, b) a = max(a, b) #define rep(i, lim) for (size_t i = 0; i < (lim); i++) #define nrep(i, s, lim) for (size_t i = s; i < (lim); i++) #define repv(i, v) for (auto &i : (v)) #define fillv(v) for (auto &itr_ : (v)) { cin >> itr_; } #define sortv(v) sort(v.begin(), v.end()) #define all(v) (v).begin(), (v).end() using vi = vector; using vvi = vector; using vvvi = vector; using vvvvi = vector; using ll = long long; using vl = vector; using vvl = vector; using vvvl = vector; using vvvvl = vector; template auto operator<<(ostream &os, const vector &vec)->ostream& { os << vec[0]; for (size_t i = 1; i < vec.size(); i++) { os << ' ' << vec[i]; } os << '\n'; return os; } template auto operator>>(istream &is, vector &vec)->istream& { for (auto &i : vec) { is >> i; } return is; } template auto operator<<(ostream &os, const vector> &vec)->ostream& { for (auto &i : vec) { os << i[0]; for (size_t j = 1; j < i.size(); j++) { os << ' ' << i[j]; } os << '\n'; } return os; } template auto operator>>(istream &is, vector> &vec)->istream& { for (auto &i : vec) { for (auto &j : i) { is >> j; } } return is; } int main() { ios::sync_with_stdio(false); cin.tie(nullptr); int n, m; cin >> n >> m; set attempts; for (int i = 1; i <= n * m; i++) { attempts.insert(i); } vvi fds(n, vi(m)); cin >> fds; auto choice = [&](int i, int j, int t) { int add[4][2] = {{0, 1}, {0, -1}, {1, 0}, {-1, 0}}; int ans = INT32_MAX >> 1; for (auto &k : add) { int id = i + k[0]; int jd = j + k[1]; if (id >= 0 && id < n && jd >= 0 && jd < m) { int now = fds[id][jd]; if (abs(t - now) < abs(t - ans) || (abs(t - now) == abs(t - ans) && abs(fds[i][j] - now) < abs(fds[i][j] - ans))) { ans = now; } } } return ans; }; vvvi graph(n * m, vvi(n * m)); vvvi look(n * m, vvi(n * m)); for (int i = 1; i <= n * m; i++) { rep(j, n) { rep(k, m) { if (fds[j][k] == i) { continue; } int tmp = choice(j, k, i); graph[i - 1][tmp - 1].push_back(fds[j][k] - 1); look[i - 1][fds[j][k] - 1].push_back(tmp - 1); } } } vvi depth(n * m, vi(n * m, 0)); V vis(n * m); function dfs = [&](int i, int t, int d) { vis[i] = true; depth[i][t] = d; for (auto j : graph[t][i]) { if (vis[j]) { continue; } dfs(j, t, d + 1); } }; rep(i, n * m) { fill(all(vis), false); dfs(i, i, 0); auto itr = attempts.begin(); while (itr != attempts.end()) { if (!vis[*itr]) { itr = attempts.erase(itr); } else { itr++; } } if (attempts.empty()) { break; } } if (attempts.empty()) { cout << "impossible\n"; return 0; } int ans = 0; int minimal = INT32_MAX >> 1; for (auto i : attempts) { int get = 0; for (auto j : depth[i]) { rmax(get, j); } if (get < minimal) { ans = i; minimal = get; } } cout << ans + 1 << ' ' << minimal << '\n'; }