結果
問題 | No.2503 Typical Path Counting Problem on a Grid |
ユーザー | torisasami4 |
提出日時 | 2023-10-12 01:11:02 |
言語 | C++17 (gcc 12.3.0 + boost 1.83.0) |
結果 |
AC
|
実行時間 | 457 ms / 2,000 ms |
コード長 | 10,973 bytes |
コンパイル時間 | 3,110 ms |
コンパイル使用メモリ | 244,548 KB |
実行使用メモリ | 42,368 KB |
最終ジャッジ日時 | 2024-09-15 13:58:39 |
合計ジャッジ時間 | 6,936 ms |
ジャッジサーバーID (参考情報) |
judge3 / judge2 |
(要ログイン)
テストケース
テストケース表示入力 | 結果 | 実行時間 実行使用メモリ |
---|---|---|
testcase_00 | AC | 143 ms
42,112 KB |
testcase_01 | AC | 186 ms
42,240 KB |
testcase_02 | AC | 165 ms
42,368 KB |
testcase_03 | AC | 277 ms
42,240 KB |
testcase_04 | AC | 392 ms
42,240 KB |
testcase_05 | AC | 247 ms
42,240 KB |
testcase_06 | AC | 454 ms
42,240 KB |
testcase_07 | AC | 457 ms
42,112 KB |
testcase_08 | AC | 306 ms
42,240 KB |
testcase_09 | AC | 394 ms
42,240 KB |
ソースコード
// #define _GLIBCXX_DEBUG #pragma GCC optimize("O2,no-stack-protector,unroll-loops,fast-math") #include <bits/stdc++.h> using namespace std; #define rep(i, n) for (int i = 0; i < int(n); i++) #define per(i, n) for (int i = (n)-1; 0 <= i; i--) #define rep2(i, l, r) for (int i = (l); i < int(r); i++) #define per2(i, l, r) for (int i = (r)-1; int(l) <= i; i--) #define each(e, v) for (auto& e : v) #define MM << " " << #define pb push_back #define eb emplace_back #define all(x) begin(x), end(x) #define rall(x) rbegin(x), rend(x) #define sz(x) (int)x.size() template <typename T> void print(const vector<T>& v, T x = 0) { int n = v.size(); for (int i = 0; i < n; i++) cout << v[i] + x << (i == n - 1 ? '\n' : ' '); if (v.empty()) cout << '\n'; } using ll = long long; using pii = pair<int, int>; using pll = pair<ll, ll>; template <typename T> bool chmax(T& x, const T& y) { return (x < y) ? (x = y, true) : false; } template <typename T> bool chmin(T& x, const T& y) { return (x > y) ? (x = y, true) : false; } template <class T> using minheap = std::priority_queue<T, std::vector<T>, std::greater<T>>; template <class T> using maxheap = std::priority_queue<T>; template <typename T> int lb(const vector<T>& v, T x) { return lower_bound(begin(v), end(v), x) - begin(v); } template <typename T> int ub(const vector<T>& v, T x) { return upper_bound(begin(v), end(v), x) - begin(v); } template <typename T> void rearrange(vector<T>& v) { sort(begin(v), end(v)); v.erase(unique(begin(v), end(v)), end(v)); } // __int128_t gcd(__int128_t a, __int128_t b) { // if (a == 0) // return b; // if (b == 0) // return a; // __int128_t cnt = a % b; // while (cnt != 0) { // a = b; // b = cnt; // cnt = a % b; // } // return b; // } struct Union_Find_Tree { vector<int> data; const int n; int cnt; Union_Find_Tree(int n) : data(n, -1), n(n), cnt(n) {} int root(int x) { if (data[x] < 0) return x; return data[x] = root(data[x]); } int operator[](int i) { return root(i); } bool unite(int x, int y) { x = root(x), y = root(y); if (x == y) return false; if (data[x] > data[y]) swap(x, y); data[x] += data[y], data[y] = x; cnt--; return true; } int size(int x) { return -data[root(x)]; } int count() { return cnt; }; bool same(int x, int y) { return root(x) == root(y); } void clear() { cnt = n; fill(begin(data), end(data), -1); } }; template <int mod> struct Mod_Int { int x; Mod_Int() : x(0) {} Mod_Int(long long y) : x(y >= 0 ? y % mod : (mod - (-y) % mod) % mod) {} static int get_mod() { return mod; } Mod_Int& operator+=(const Mod_Int& p) { if ((x += p.x) >= mod) x -= mod; return *this; } Mod_Int& operator-=(const Mod_Int& p) { if ((x += mod - p.x) >= mod) x -= mod; return *this; } Mod_Int& operator*=(const Mod_Int& p) { x = (int)(1LL * x * p.x % mod); return *this; } Mod_Int& operator/=(const Mod_Int& p) { *this *= p.inverse(); return *this; } Mod_Int& operator++() { return *this += Mod_Int(1); } Mod_Int operator++(int) { Mod_Int tmp = *this; ++*this; return tmp; } Mod_Int& operator--() { return *this -= Mod_Int(1); } Mod_Int operator--(int) { Mod_Int tmp = *this; --*this; return tmp; } Mod_Int operator-() const { return Mod_Int(-x); } Mod_Int operator+(const Mod_Int& p) const { return Mod_Int(*this) += p; } Mod_Int operator-(const Mod_Int& p) const { return Mod_Int(*this) -= p; } Mod_Int operator*(const Mod_Int& p) const { return Mod_Int(*this) *= p; } Mod_Int operator/(const Mod_Int& p) const { return Mod_Int(*this) /= p; } bool operator==(const Mod_Int& p) const { return x == p.x; } bool operator!=(const Mod_Int& p) const { return x != p.x; } Mod_Int inverse() const { assert(*this != Mod_Int(0)); return pow(mod - 2); } Mod_Int pow(long long k) const { Mod_Int now = *this, ret = 1; for (; k > 0; k >>= 1, now *= now) { if (k & 1) ret *= now; } return ret; } friend ostream& operator<<(ostream& os, const Mod_Int& p) { return os << p.x; } friend istream& operator>>(istream& is, Mod_Int& p) { long long a; is >> a; p = Mod_Int<mod>(a); return is; } }; ll mpow2(ll x, ll n, ll mod) { ll ans = 1; x %= mod; while (n != 0) { if (n & 1) ans = ans * x % mod; x = x * x % mod; n = n >> 1; } ans %= mod; return ans; } template <typename T> T modinv(T a, const T& m) { T b = m, u = 1, v = 0; while (b > 0) { T t = a / b; swap(a -= t * b, b); swap(u -= t * v, v); } return u >= 0 ? u % m : (m - (-u) % m) % m; } ll divide_int(ll a, ll b) { if (b < 0) a = -a, b = -b; return (a >= 0 ? a / b : (a - b + 1) / b); } // const int MOD = 1000000007; const int MOD = 998244353; using mint = Mod_Int<MOD>; // ----- library ------- template <typename T> struct Matrix { vector<vector<T>> A; int n, m; Matrix(int n, int m) : A(n, vector<T>(m, 0)), n(n), m(m) {} inline const vector<T> &operator[](int k) const { return A[k]; } inline vector<T> &operator[](int k) { return A[k]; } static Matrix I(int l) { Matrix ret(l, l); for (int i = 0; i < l; i++) ret[i][i] = 1; return ret; } Matrix &operator*=(const Matrix &B) { assert(m == B.n); Matrix ret(n, B.m); for (int i = 0; i < n; i++) { for (int k = 0; k < m; k++) { for (int j = 0; j < B.m; j++) ret[i][j] += A[i][k] * B[k][j]; } } swap(A, ret.A); m = B.m; return *this; } Matrix operator*(const Matrix &B) const { return Matrix(*this) *= B; } Matrix pow(long long k) const { assert(n == m); Matrix now = *this, ret = I(n); for (; k > 0; k >>= 1, now *= now) { if (k & 1) ret *= now; } return ret; } bool eq(const T &a, const T &b) const { return a == b; // return abs(a-b) <= EPS; } // 行基本変形を用いて簡約化を行い、(rank, det) の組を返す pair<int, T> row_reduction(vector<T> &b) { assert((int)b.size() == n); if (n == 0) return make_pair(0, m > 0 ? 0 : 1); int check = 0, rank = 0; T det = (n == m ? 1 : 0); for (int j = 0; j < m; j++) { int pivot = check; for (int i = check; i < n; i++) { if (A[i][j] != 0) pivot = i; // if(abs(A[i][j]) > abs(A[pivot][j])) pivot = i; // T が小数の場合はこちら } if (check != pivot) det *= T(-1); swap(A[check], A[pivot]), swap(b[check], b[pivot]); if (eq(A[check][j], T(0))) { det = T(0); continue; } rank++; det *= A[check][j]; T r = T(1) / A[check][j]; for (int k = j + 1; k < m; k++) A[check][k] *= r; b[check] *= r; A[check][j] = T(1); for (int i = 0; i < n; i++) { if (i == check) continue; if (!eq(A[i][j], 0)) { for (int k = j + 1; k < m; k++) A[i][k] -= A[i][j] * A[check][k]; b[i] -= A[i][j] * b[check]; } A[i][j] = T(0); } if (++check == n) break; } return make_pair(rank, det); } pair<int, T> row_reduction() { vector<T> b(n, T(0)); return row_reduction(b); } // 行基本変形を行い、逆行列を求める pair<bool, Matrix> inverse() { if (n != m) return make_pair(false, Matrix(0, 0)); if (n == 0) return make_pair(true, Matrix(0, 0)); Matrix ret = I(n); for (int j = 0; j < n; j++) { int pivot = j; for (int i = j; i < n; i++) { if (A[i][j] != 0) pivot = i; // if(abs(A[i][j]) > abs(A[pivot][j])) pivot = i; // T が小数の場合はこちら } swap(A[j], A[pivot]), swap(ret[j], ret[pivot]); if (eq(A[j][j], T(0))) return make_pair(false, Matrix(0, 0)); T r = T(1) / A[j][j]; for (int k = j + 1; k < n; k++) A[j][k] *= r; for (int k = 0; k < n; k++) ret[j][k] *= r; A[j][j] = T(1); for (int i = 0; i < n; i++) { if (i == j) continue; if (!eq(A[i][j], T(0))) { for (int k = j + 1; k < n; k++) A[i][k] -= A[i][j] * A[j][k]; for (int k = 0; k < n; k++) ret[i][k] -= A[i][j] * ret[j][k]; } A[i][j] = T(0); } } return make_pair(true, ret); } // Ax = b の解の 1 つと解空間の基底の組を返す vector<vector<T>> Gaussian_elimination(vector<T> b) { row_reduction(b); vector<vector<T>> ret; vector<int> p(n, m); vector<bool> is_zero(m, true); for (int i = 0; i < n; i++) { for (int j = 0; j < m; j++) { if (!eq(A[i][j], T(0))) { p[i] = j; break; } } if (p[i] < m) { is_zero[p[i]] = false; } else if (!eq(b[i], T(0))) { return {}; } } vector<T> x(m, T(0)); for (int i = 0; i < n; i++) { if (p[i] < m) x[p[i]] = b[i]; } ret.push_back(x); for (int j = 0; j < m; j++) { if (!is_zero[j]) continue; x[j] = T(1); for (int i = 0; i < n; i++) { if (p[i] < m) x[p[i]] = -A[i][j]; } ret.push_back(x); x[j] = T(0); } return ret; } }; // ----- library ------- int main() { ios::sync_with_stdio(false); std::cin.tie(nullptr); cout << fixed << setprecision(15); const int si = 1e7 + 10; vector<mint> f(si); f[0] = 1, f[1] = 2; rep2(i, 2, si) f[i] = f[i - 1] * i * 2 + f[i - 2] * (i - 1); int T; cin >> T; while (T--) { ll n, m; cin >> n >> m; if (n > m) swap(n, m); if (n == 0) { cout << 1 << '\n'; continue; } Matrix<mint> a(2, 2), b(2, 1); a[0][0] = n * 2 + 1, a[0][1] = n; a[1][0] = 1, a[1][1] = 0; b[0][0] = f[n]; b[1][0] = f[n - 1]; auto ret = a.pow(m - n) * b; cout << ret[0][0] * f[n] + ret[1][0] * f[n - 1] * n << '\n'; } }