cplib-cpp
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linear_algebra_matrix/test/matrix_det_dual_number.yuki1303.test.cpp
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- Last update: 2023-12-26 21:26:22+09:00
- Problem: https://yukicoder.me/problems/no/1303
Depends on
- linear_algebra_matrix/matrix.hpp
- modint.hpp
- Dual number （二重数）
(number/dual_number.hpp)
- unionfind/unionfind.hpp
Code
#define PROBLEM "https://yukicoder.me/problems/no/1303"
#include "../../modint.hpp"
#include "../../number/dual_number.hpp"
#include "../../unionfind/unionfind.hpp"
#include "../matrix.hpp"
#include <iostream>
#include <utility>
#include <vector>
using namespace std;
using mint = ModInt<998244353>;
using dual = DualNumber<mint>;
mint solve1(int N, const vector<pair<int, int>> &edges) {
vector<vector<dual>> d(N, vector<dual>(N));
for (auto p : edges) {
int u = p.first, v = p.second;
d[u][u] += dual::id();
d[v][v] += dual::id();
d[u][v] -= dual::id();
d[v][u] -= dual::id();
}
const dual x = dual(0, 1);
for (int i = 0; i < N; ++i) {
for (int j = 0; j < i; ++j) {
if (d[i][j] == dual()) {
d[i][i] += x;
d[j][j] += x;
d[i][j] -= x;
d[j][i] -= x;
}
}
}
d.resize(N - 1);
for (auto &v : d) v.resize(N - 1);
auto ret = matrix<dual>(d).gauss_jordan().determinant_of_upper_triangle();
return ret.a + ret.b;
}
mint solve2(const vector<int> &vs, const vector<pair<int, int>> &edges) {
int D = vs.size();
matrix<mint> mat(D - 1, D - 1);
for (auto p : edges) {
int i = lower_bound(vs.begin(), vs.end(), p.first) - vs.begin();
int j = lower_bound(vs.begin(), vs.end(), p.second) - vs.begin();
if (i < D - 1) mat[i][i] += 1;
if (j < D - 1) mat[j][j] += 1;
if (i + 1 < D and j + 1 < D) mat[i][j] -= 1, mat[j][i] -= 1;
}
return mat.gauss_jordan().determinant_of_upper_triangle();
}
int main() {
cin.tie(nullptr), ios::sync_with_stdio(false);
int N, M;
cin >> N >> M;
vector<pair<int, int>> edges;
UnionFind uf1(N);
while (M--) {
int u, v;
cin >> u >> v;
--u, --v;
edges.emplace_back(u, v);
uf1.unite(u, v);
}
if (uf1.count(0) == N) {
cout << "0\n" << solve1(N, edges) << '\n';
return 0;
}
int max_red = 0, cntmaxi = 0, fuben = 0;
for (int i = 0; i < N; ++i) {
for (int j = 0; j < N; ++j) fuben += !uf1.same(i, j);
}
for (int i = 0; i < N; ++i) {
for (int j = 0; j < i; ++j) {
if (!uf1.same(i, j)) {
int s = uf1.count(i) * uf1.count(j);
if (s > max_red) {
max_red = s, cntmaxi = 1;
} else {
if (max_red == s) cntmaxi++;
}
}
}
}
mint ret = cntmaxi;
vector<vector<int>> r2is(N);
vector<vector<pair<int, int>>> r2edges(N);
for (int i = 0; i < N; ++i) r2is[uf1.find(i)].push_back(i);
for (auto p : edges) r2edges[uf1.find(p.first)].push_back(p);
for (int r = 0; r < N; ++r) {
if (r2is[r].size()) ret *= solve2(r2is[r], r2edges[r]);
}
cout << fuben - max_red * 2 << '\n' << ret << '\n';
}#line 1 "linear_algebra_matrix/test/matrix_det_dual_number.yuki1303.test.cpp"
#define PROBLEM "https://yukicoder.me/problems/no/1303"
#line 2 "modint.hpp"
#include <cassert>
#include <iostream>
#include <set>
#include <vector>
template <int md> struct ModInt {
using lint = long long;
constexpr static int mod() { return md; }
static int get_primitive_root() {
static int primitive_root = 0;
if (!primitive_root) {
primitive_root = [&]() {
std::set<int> fac;
int v = md - 1;
for (lint i = 2; i * i <= v; i++)
while (v % i == 0) fac.insert(i), v /= i;
if (v > 1) fac.insert(v);
for (int g = 1; g < md; g++) {
bool ok = true;
for (auto i : fac)
if (ModInt(g).pow((md - 1) / i) == 1) {
ok = false;
break;
}
if (ok) return g;
}
return -1;
}();
}
return primitive_root;
}
int val_;
int val() const noexcept { return val_; }
constexpr ModInt() : val_(0) {}
constexpr ModInt &_setval(lint v) { return val_ = (v >= md ? v - md : v), *this; }
constexpr ModInt(lint v) { _setval(v % md + md); }
constexpr explicit operator bool() const { return val_ != 0; }
constexpr ModInt operator+(const ModInt &x) const {
return ModInt()._setval((lint)val_ + x.val_);
}
constexpr ModInt operator-(const ModInt &x) const {
return ModInt()._setval((lint)val_ - x.val_ + md);
}
constexpr ModInt operator*(const ModInt &x) const {
return ModInt()._setval((lint)val_ * x.val_ % md);
}
constexpr ModInt operator/(const ModInt &x) const {
return ModInt()._setval((lint)val_ * x.inv().val() % md);
}
constexpr ModInt operator-() const { return ModInt()._setval(md - val_); }
constexpr ModInt &operator+=(const ModInt &x) { return *this = *this + x; }
constexpr ModInt &operator-=(const ModInt &x) { return *this = *this - x; }
constexpr ModInt &operator*=(const ModInt &x) { return *this = *this * x; }
constexpr ModInt &operator/=(const ModInt &x) { return *this = *this / x; }
friend constexpr ModInt operator+(lint a, const ModInt &x) { return ModInt(a) + x; }
friend constexpr ModInt operator-(lint a, const ModInt &x) { return ModInt(a) - x; }
friend constexpr ModInt operator*(lint a, const ModInt &x) { return ModInt(a) * x; }
friend constexpr ModInt operator/(lint a, const ModInt &x) { return ModInt(a) / x; }
constexpr bool operator==(const ModInt &x) const { return val_ == x.val_; }
constexpr bool operator!=(const ModInt &x) const { return val_ != x.val_; }
constexpr bool operator<(const ModInt &x) const {
return val_ < x.val_;
} // To use std::map<ModInt, T>
friend std::istream &operator>>(std::istream &is, ModInt &x) {
lint t;
return is >> t, x = ModInt(t), is;
}
constexpr friend std::ostream &operator<<(std::ostream &os, const ModInt &x) {
return os << x.val_;
}
constexpr ModInt pow(lint n) const {
ModInt ans = 1, tmp = *this;
while (n) {
if (n & 1) ans *= tmp;
tmp *= tmp, n >>= 1;
}
return ans;
}
static constexpr int cache_limit = std::min(md, 1 << 21);
static std::vector<ModInt> facs, facinvs, invs;
constexpr static void _precalculation(int N) {
const int l0 = facs.size();
if (N > md) N = md;
if (N <= l0) return;
facs.resize(N), facinvs.resize(N), invs.resize(N);
for (int i = l0; i < N; i++) facs[i] = facs[i - 1] * i;
facinvs[N - 1] = facs.back().pow(md - 2);
for (int i = N - 2; i >= l0; i--) facinvs[i] = facinvs[i + 1] * (i + 1);
for (int i = N - 1; i >= l0; i--) invs[i] = facinvs[i] * facs[i - 1];
}
constexpr ModInt inv() const {
if (this->val_ < cache_limit) {
if (facs.empty()) facs = {1}, facinvs = {1}, invs = {0};
while (this->val_ >= int(facs.size())) _precalculation(facs.size() * 2);
return invs[this->val_];
} else {
return this->pow(md - 2);
}
}
constexpr ModInt fac() const {
while (this->val_ >= int(facs.size())) _precalculation(facs.size() * 2);
return facs[this->val_];
}
constexpr ModInt facinv() const {
while (this->val_ >= int(facs.size())) _precalculation(facs.size() * 2);
return facinvs[this->val_];
}
constexpr ModInt doublefac() const {
lint k = (this->val_ + 1) / 2;
return (this->val_ & 1) ? ModInt(k * 2).fac() / (ModInt(2).pow(k) * ModInt(k).fac())
: ModInt(k).fac() * ModInt(2).pow(k);
}
constexpr ModInt nCr(int r) const {
if (r < 0 or this->val_ < r) return ModInt(0);
return this->fac() * (*this - r).facinv() * ModInt(r).facinv();
}
constexpr ModInt nPr(int r) const {
if (r < 0 or this->val_ < r) return ModInt(0);
return this->fac() * (*this - r).facinv();
}
static ModInt binom(int n, int r) {
static long long bruteforce_times = 0;
if (r < 0 or n < r) return ModInt(0);
if (n <= bruteforce_times or n < (int)facs.size()) return ModInt(n).nCr(r);
r = std::min(r, n - r);
ModInt ret = ModInt(r).facinv();
for (int i = 0; i < r; ++i) ret *= n - i;
bruteforce_times += r;
return ret;
}
// Multinomial coefficient, (k_1 + k_2 + ... + k_m)! / (k_1! k_2! ... k_m!)
// Complexity: O(sum(ks))
template <class Vec> static ModInt multinomial(const Vec &ks) {
ModInt ret{1};
int sum = 0;
for (int k : ks) {
assert(k >= 0);
ret *= ModInt(k).facinv(), sum += k;
}
return ret * ModInt(sum).fac();
}
// Catalan number, C_n = binom(2n, n) / (n + 1)
// C_0 = 1, C_1 = 1, C_2 = 2, C_3 = 5, C_4 = 14, ...
// https://oeis.org/A000108
// Complexity: O(n)
static ModInt catalan(int n) {
if (n < 0) return ModInt(0);
return ModInt(n * 2).fac() * ModInt(n + 1).facinv() * ModInt(n).facinv();
}
ModInt sqrt() const {
if (val_ == 0) return 0;
if (md == 2) return val_;
if (pow((md - 1) / 2) != 1) return 0;
ModInt b = 1;
while (b.pow((md - 1) / 2) == 1) b += 1;
int e = 0, m = md - 1;
while (m % 2 == 0) m >>= 1, e++;
ModInt x = pow((m - 1) / 2), y = (*this) * x * x;
x *= (*this);
ModInt z = b.pow(m);
while (y != 1) {
int j = 0;
ModInt t = y;
while (t != 1) j++, t *= t;
z = z.pow(1LL << (e - j - 1));
x *= z, z *= z, y *= z;
e = j;
}
return ModInt(std::min(x.val_, md - x.val_));
}
};
template <int md> std::vector<ModInt<md>> ModInt<md>::facs = {1};
template <int md> std::vector<ModInt<md>> ModInt<md>::facinvs = {1};
template <int md> std::vector<ModInt<md>> ModInt<md>::invs = {0};
using ModInt998244353 = ModInt<998244353>;
// using mint = ModInt<998244353>;
// using mint = ModInt<1000000007>;
#line 1 "number/dual_number.hpp"
#include <type_traits>
namespace dual_number_ {
struct has_id_method_impl {
template <class T_> static auto check(T_ *) -> decltype(T_::id(), std::true_type());
template <class T_> static auto check(...) -> std::false_type;
};
template <class T_> struct has_id : decltype(has_id_method_impl::check<T_>(nullptr)) {};
} // namespace dual_number_
// Dual number （二重数）
// Verified: https://atcoder.jp/contests/abc235/tasks/abc235_f
template <class T> struct DualNumber {
T a, b; // a + bx
template <typename T2, typename std::enable_if<dual_number_::has_id<T2>::value>::type * = nullptr>
static T2 _T_id() {
return T2::id();
}
template <typename T2, typename std::enable_if<!dual_number_::has_id<T2>::value>::type * = nullptr>
static T2 _T_id() {
return T2(1);
}
DualNumber(T x = T(), T y = T()) : a(x), b(y) {}
static DualNumber id() { return DualNumber(_T_id<T>(), T()); }
explicit operator bool() const { return a != T() or b != T(); }
DualNumber operator+(const DualNumber &x) const { return DualNumber(a + x.a, b + x.b); }
DualNumber operator-(const DualNumber &x) const { return DualNumber(a - x.a, b - x.b); }
DualNumber operator*(const DualNumber &x) const {
return DualNumber(a * x.a, b * x.a + a * x.b);
}
DualNumber operator/(const DualNumber &x) const {
T cinv = _T_id<T>() / x.a;
return DualNumber(a * cinv, (b * x.a - a * x.b) * cinv * cinv);
}
DualNumber operator-() const { return DualNumber(-a, -b); }
DualNumber &operator+=(const DualNumber &x) { return *this = *this + x; }
DualNumber &operator-=(const DualNumber &x) { return *this = *this - x; }
DualNumber &operator*=(const DualNumber &x) { return *this = *this * x; }
DualNumber &operator/=(const DualNumber &x) { return *this = *this / x; }
bool operator==(const DualNumber &x) const { return a == x.a and b == x.b; }
bool operator!=(const DualNumber &x) const { return !(*this == x); }
bool operator<(const DualNumber &x) const { return (a != x.a ? a < x.a : b < x.b); }
template <class OStream> friend OStream &operator<<(OStream &os, const DualNumber &x) {
return os << '{' << x.a << ',' << x.b << '}';
}
T eval(const T &x) const { return a + b * x; }
T root() const { return (-a) / b; } // Solve a + bx = 0 (b \neq 0 is assumed)
};
#line 2 "unionfind/unionfind.hpp"
#include <algorithm>
#include <numeric>
#include <utility>
#line 6 "unionfind/unionfind.hpp"
// CUT begin
// UnionFind Tree (0-indexed), based on size of each disjoint set
struct UnionFind {
std::vector<int> par, cou;
UnionFind(int N = 0) : par(N), cou(N, 1) { iota(par.begin(), par.end(), 0); }
int find(int x) { return (par[x] == x) ? x : (par[x] = find(par[x])); }
bool unite(int x, int y) {
x = find(x), y = find(y);
if (x == y) return false;
if (cou[x] < cou[y]) std::swap(x, y);
par[y] = x, cou[x] += cou[y];
return true;
}
int count(int x) { return cou[find(x)]; }
bool same(int x, int y) { return find(x) == find(y); }
std::vector<std::vector<int>> groups() {
std::vector<std::vector<int>> ret(par.size());
for (int i = 0; i < int(par.size()); ++i) ret[find(i)].push_back(i);
ret.erase(std::remove_if(ret.begin(), ret.end(),
[&](const std::vector<int> &v) { return v.empty(); }),
ret.end());
return ret;
}
};
#line 4 "linear_algebra_matrix/matrix.hpp"
#include <cmath>
#include <iterator>
#line 9 "linear_algebra_matrix/matrix.hpp"
namespace matrix_ {
struct has_id_method_impl {
template <class T_> static auto check(T_ *) -> decltype(T_::id(), std::true_type());
template <class T_> static auto check(...) -> std::false_type;
};
template <class T_> struct has_id : decltype(has_id_method_impl::check<T_>(nullptr)) {};
} // namespace matrix_
template <typename T> struct matrix {
int H, W;
std::vector<T> elem;
typename std::vector<T>::iterator operator[](int i) { return elem.begin() + i * W; }
inline T &at(int i, int j) { return elem[i * W + j]; }
inline T get(int i, int j) const { return elem[i * W + j]; }
int height() const { return H; }
int width() const { return W; }
std::vector<std::vector<T>> vecvec() const {
std::vector<std::vector<T>> ret(H);
for (int i = 0; i < H; i++) {
std::copy(elem.begin() + i * W, elem.begin() + (i + 1) * W, std::back_inserter(ret[i]));
}
return ret;
}
operator std::vector<std::vector<T>>() const { return vecvec(); }
matrix() = default;
matrix(int H, int W) : H(H), W(W), elem(H * W) {}
matrix(const std::vector<std::vector<T>> &d) : H(d.size()), W(d.size() ? d[0].size() : 0) {
for (auto &raw : d) std::copy(raw.begin(), raw.end(), std::back_inserter(elem));
}
template <typename T2, typename std::enable_if<matrix_::has_id<T2>::value>::type * = nullptr>
static T2 _T_id() {
return T2::id();
}
template <typename T2, typename std::enable_if<!matrix_::has_id<T2>::value>::type * = nullptr>
static T2 _T_id() {
return T2(1);
}
static matrix Identity(int N) {
matrix ret(N, N);
for (int i = 0; i < N; i++) ret.at(i, i) = _T_id<T>();
return ret;
}
matrix operator-() const {
matrix ret(H, W);
for (int i = 0; i < H * W; i++) ret.elem[i] = -elem[i];
return ret;
}
matrix operator*(const T &v) const {
matrix ret = *this;
for (auto &x : ret.elem) x *= v;
return ret;
}
matrix operator/(const T &v) const {
matrix ret = *this;
const T vinv = _T_id<T>() / v;
for (auto &x : ret.elem) x *= vinv;
return ret;
}
matrix operator+(const matrix &r) const {
matrix ret = *this;
for (int i = 0; i < H * W; i++) ret.elem[i] += r.elem[i];
return ret;
}
matrix operator-(const matrix &r) const {
matrix ret = *this;
for (int i = 0; i < H * W; i++) ret.elem[i] -= r.elem[i];
return ret;
}
matrix operator*(const matrix &r) const {
matrix ret(H, r.W);
for (int i = 0; i < H; i++) {
for (int k = 0; k < W; k++) {
for (int j = 0; j < r.W; j++) ret.at(i, j) += this->get(i, k) * r.get(k, j);
}
}
return ret;
}
matrix &operator*=(const T &v) { return *this = *this * v; }
matrix &operator/=(const T &v) { return *this = *this / v; }
matrix &operator+=(const matrix &r) { return *this = *this + r; }
matrix &operator-=(const matrix &r) { return *this = *this - r; }
matrix &operator*=(const matrix &r) { return *this = *this * r; }
bool operator==(const matrix &r) const { return H == r.H and W == r.W and elem == r.elem; }
bool operator!=(const matrix &r) const { return H != r.H or W != r.W or elem != r.elem; }
bool operator<(const matrix &r) const { return elem < r.elem; }
matrix pow(int64_t n) const {
matrix ret = Identity(H);
bool ret_is_id = true;
if (n == 0) return ret;
for (int i = 63 - __builtin_clzll(n); i >= 0; i--) {
if (!ret_is_id) ret *= ret;
if ((n >> i) & 1) ret *= (*this), ret_is_id = false;
}
return ret;
}
std::vector<T> pow_vec(int64_t n, std::vector<T> vec) const {
matrix x = *this;
while (n) {
if (n & 1) vec = x * vec;
x *= x;
n >>= 1;
}
return vec;
};
matrix transpose() const {
matrix ret(W, H);
for (int i = 0; i < H; i++) {
for (int j = 0; j < W; j++) ret.at(j, i) = this->get(i, j);
}
return ret;
}
// Gauss-Jordan elimination
// - Require inverse for every non-zero element
// - Complexity: O(H^2 W)
template <typename T2, typename std::enable_if<std::is_floating_point<T2>::value>::type * = nullptr>
static int choose_pivot(const matrix<T2> &mtr, int h, int c) noexcept {
int piv = -1;
for (int j = h; j < mtr.H; j++) {
if (mtr.get(j, c) and (piv < 0 or std::abs(mtr.get(j, c)) > std::abs(mtr.get(piv, c))))
piv = j;
}
return piv;
}
template <typename T2, typename std::enable_if<!std::is_floating_point<T2>::value>::type * = nullptr>
static int choose_pivot(const matrix<T2> &mtr, int h, int c) noexcept {
for (int j = h; j < mtr.H; j++) {
if (mtr.get(j, c) != T2()) return j;
}
return -1;
}
matrix gauss_jordan() const {
int c = 0;
matrix mtr(*this);
std::vector<int> ws;
ws.reserve(W);
for (int h = 0; h < H; h++) {
if (c == W) break;
int piv = choose_pivot(mtr, h, c);
if (piv == -1) {
c++;
h--;
continue;
}
if (h != piv) {
for (int w = 0; w < W; w++) {
std::swap(mtr[piv][w], mtr[h][w]);
mtr.at(piv, w) *= -_T_id<T>(); // To preserve sign of determinant
}
}
ws.clear();
for (int w = c; w < W; w++) {
if (mtr.at(h, w) != T()) ws.emplace_back(w);
}
const T hcinv = _T_id<T>() / mtr.at(h, c);
for (int hh = 0; hh < H; hh++)
if (hh != h) {
const T coeff = mtr.at(hh, c) * hcinv;
for (auto w : ws) mtr.at(hh, w) -= mtr.at(h, w) * coeff;
mtr.at(hh, c) = T();
}
c++;
}
return mtr;
}
int rank_of_gauss_jordan() const {
for (int i = H * W - 1; i >= 0; i--) {
if (elem[i] != 0) return i / W + 1;
}
return 0;
}
int rank() const { return gauss_jordan().rank_of_gauss_jordan(); }
T determinant_of_upper_triangle() const {
T ret = _T_id<T>();
for (int i = 0; i < H; i++) ret *= get(i, i);
return ret;
}
int inverse() {
assert(H == W);
std::vector<std::vector<T>> ret = Identity(H), tmp = *this;
int rank = 0;
for (int i = 0; i < H; i++) {
int ti = i;
while (ti < H and tmp[ti][i] == T()) ti++;
if (ti == H) {
continue;
} else {
rank++;
}
ret[i].swap(ret[ti]), tmp[i].swap(tmp[ti]);
T inv = _T_id<T>() / tmp[i][i];
for (int j = 0; j < W; j++) ret[i][j] *= inv;
for (int j = i + 1; j < W; j++) tmp[i][j] *= inv;
for (int h = 0; h < H; h++) {
if (i == h) continue;
const T c = -tmp[h][i];
for (int j = 0; j < W; j++) ret[h][j] += ret[i][j] * c;
for (int j = i + 1; j < W; j++) tmp[h][j] += tmp[i][j] * c;
}
}
*this = ret;
return rank;
}
friend std::vector<T> operator*(const matrix &m, const std::vector<T> &v) {
assert(m.W == int(v.size()));
std::vector<T> ret(m.H);
for (int i = 0; i < m.H; i++) {
for (int j = 0; j < m.W; j++) ret[i] += m.get(i, j) * v[j];
}
return ret;
}
friend std::vector<T> operator*(const std::vector<T> &v, const matrix &m) {
assert(int(v.size()) == m.H);
std::vector<T> ret(m.W);
for (int i = 0; i < m.H; i++) {
for (int j = 0; j < m.W; j++) ret[j] += v[i] * m.get(i, j);
}
return ret;
}
std::vector<T> prod(const std::vector<T> &v) const { return (*this) * v; }
std::vector<T> prod_left(const std::vector<T> &v) const { return v * (*this); }
template <class OStream> friend OStream &operator<<(OStream &os, const matrix &x) {
os << "[(" << x.H << " * " << x.W << " matrix)";
os << "\n[column sums: ";
for (int j = 0; j < x.W; j++) {
T s = T();
for (int i = 0; i < x.H; i++) s += x.get(i, j);
os << s << ",";
}
os << "]";
for (int i = 0; i < x.H; i++) {
os << "\n[";
for (int j = 0; j < x.W; j++) os << x.get(i, j) << ",";
os << "]";
}
os << "]\n";
return os;
}
template <class IStream> friend IStream &operator>>(IStream &is, matrix &x) {
for (auto &v : x.elem) is >> v;
return is;
}
};
#line 6 "linear_algebra_matrix/test/matrix_det_dual_number.yuki1303.test.cpp"
#line 10 "linear_algebra_matrix/test/matrix_det_dual_number.yuki1303.test.cpp"
using namespace std;
using mint = ModInt<998244353>;
using dual = DualNumber<mint>;
mint solve1(int N, const vector<pair<int, int>> &edges) {
vector<vector<dual>> d(N, vector<dual>(N));
for (auto p : edges) {
int u = p.first, v = p.second;
d[u][u] += dual::id();
d[v][v] += dual::id();
d[u][v] -= dual::id();
d[v][u] -= dual::id();
}
const dual x = dual(0, 1);
for (int i = 0; i < N; ++i) {
for (int j = 0; j < i; ++j) {
if (d[i][j] == dual()) {
d[i][i] += x;
d[j][j] += x;
d[i][j] -= x;
d[j][i] -= x;
}
}
}
d.resize(N - 1);
for (auto &v : d) v.resize(N - 1);
auto ret = matrix<dual>(d).gauss_jordan().determinant_of_upper_triangle();
return ret.a + ret.b;
}
mint solve2(const vector<int> &vs, const vector<pair<int, int>> &edges) {
int D = vs.size();
matrix<mint> mat(D - 1, D - 1);
for (auto p : edges) {
int i = lower_bound(vs.begin(), vs.end(), p.first) - vs.begin();
int j = lower_bound(vs.begin(), vs.end(), p.second) - vs.begin();
if (i < D - 1) mat[i][i] += 1;
if (j < D - 1) mat[j][j] += 1;
if (i + 1 < D and j + 1 < D) mat[i][j] -= 1, mat[j][i] -= 1;
}
return mat.gauss_jordan().determinant_of_upper_triangle();
}
int main() {
cin.tie(nullptr), ios::sync_with_stdio(false);
int N, M;
cin >> N >> M;
vector<pair<int, int>> edges;
UnionFind uf1(N);
while (M--) {
int u, v;
cin >> u >> v;
--u, --v;
edges.emplace_back(u, v);
uf1.unite(u, v);
}
if (uf1.count(0) == N) {
cout << "0\n" << solve1(N, edges) << '\n';
return 0;
}
int max_red = 0, cntmaxi = 0, fuben = 0;
for (int i = 0; i < N; ++i) {
for (int j = 0; j < N; ++j) fuben += !uf1.same(i, j);
}
for (int i = 0; i < N; ++i) {
for (int j = 0; j < i; ++j) {
if (!uf1.same(i, j)) {
int s = uf1.count(i) * uf1.count(j);
if (s > max_red) {
max_red = s, cntmaxi = 1;
} else {
if (max_red == s) cntmaxi++;
}
}
}
}
mint ret = cntmaxi;
vector<vector<int>> r2is(N);
vector<vector<pair<int, int>>> r2edges(N);
for (int i = 0; i < N; ++i) r2is[uf1.find(i)].push_back(i);
for (auto p : edges) r2edges[uf1.find(p.first)].push_back(p);
for (int r = 0; r < N; ++r) {
if (r2is[r].size()) ret *= solve2(r2is[r], r2edges[r]);
}
cout << fuben - max_red * 2 << '\n' << ret << '\n';
}