結果
問題 | No.2134 $\sigma$-algebra over Finite Set |
ユーザー | 👑 emthrm |
提出日時 | 2022-11-25 22:22:21 |
言語 | C++17 (gcc 12.3.0 + boost 1.83.0) |
結果 |
WA
|
実行時間 | - |
コード長 | 8,139 bytes |
コンパイル時間 | 2,304 ms |
コンパイル使用メモリ | 205,336 KB |
実行使用メモリ | 5,248 KB |
最終ジャッジ日時 | 2024-10-02 04:59:09 |
合計ジャッジ時間 | 3,304 ms |
ジャッジサーバーID (参考情報) |
judge3 / judge1 |
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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 | WA | - |
testcase_01 | WA | - |
testcase_02 | WA | - |
testcase_03 | WA | - |
testcase_04 | WA | - |
testcase_05 | WA | - |
testcase_06 | AC | 4 ms
5,248 KB |
testcase_07 | AC | 5 ms
5,248 KB |
testcase_08 | AC | 2 ms
5,248 KB |
testcase_09 | AC | 2 ms
5,248 KB |
testcase_10 | WA | - |
testcase_11 | WA | - |
testcase_12 | AC | 25 ms
5,248 KB |
testcase_13 | WA | - |
testcase_14 | WA | - |
testcase_15 | WA | - |
testcase_16 | WA | - |
testcase_17 | AC | 2 ms
5,248 KB |
testcase_18 | AC | 2 ms
5,248 KB |
ソースコード
#define _USE_MATH_DEFINES #include <bits/stdc++.h> using namespace std; #define FOR(i,m,n) for(int i=(m);i<(n);++i) #define REP(i,n) FOR(i,0,n) #define ALL(v) (v).begin(),(v).end() using ll = long long; constexpr int INF = 0x3f3f3f3f; constexpr long long LINF = 0x3f3f3f3f3f3f3f3fLL; constexpr double EPS = 1e-8; constexpr int MOD = 998244353; // constexpr int MOD = 1000000007; constexpr int DY4[]{1, 0, -1, 0}, DX4[]{0, -1, 0, 1}; constexpr int DY8[]{1, 1, 0, -1, -1, -1, 0, 1}; constexpr int DX8[]{0, -1, -1, -1, 0, 1, 1, 1}; template <typename T, typename U> inline bool chmax(T& a, U b) { return a < b ? (a = b, true) : false; } template <typename T, typename U> inline bool chmin(T& a, U b) { return a > b ? (a = b, true) : false; } struct IOSetup { IOSetup() { std::cin.tie(nullptr); std::ios_base::sync_with_stdio(false); std::cout << fixed << setprecision(20); } } iosetup; template <int M> struct MInt { unsigned int v; MInt() : v(0) {} MInt(const long long x) : v(x >= 0 ? x % M : x % M + M) {} static constexpr int get_mod() { return M; } static void set_mod(const int divisor) { assert(divisor == M); } static void init(const int x = 10000000) { inv(x, true); fact(x); fact_inv(x); } static MInt inv(const int n, const bool init = false) { // assert(0 <= n && n < M && std::__gcd(n, M) == 1); static std::vector<MInt> inverse{0, 1}; const int prev = inverse.size(); if (n < prev) { return inverse[n]; } else if (init) { // "n!" and "M" must be disjoint. inverse.resize(n + 1); for (int i = prev; i <= n; ++i) { inverse[i] = -inverse[M % i] * (M / i); } return inverse[n]; } int u = 1, v = 0; for (unsigned int a = n, b = M; b;) { const unsigned int q = a / b; std::swap(a -= q * b, b); std::swap(u -= q * v, v); } return u; } static MInt fact(const int n) { static std::vector<MInt> factorial{1}; const int prev = factorial.size(); if (n >= prev) { factorial.resize(n + 1); for (int i = prev; i <= n; ++i) { factorial[i] = factorial[i - 1] * i; } } return factorial[n]; } static MInt fact_inv(const int n) { static std::vector<MInt> f_inv{1}; const int prev = f_inv.size(); if (n >= prev) { f_inv.resize(n + 1); f_inv[n] = inv(fact(n).v); for (int i = n; i > prev; --i) { f_inv[i - 1] = f_inv[i] * i; } } return f_inv[n]; } static MInt nCk(const int n, const int k) { if (n < 0 || n < k || k < 0) return 0; return fact(n) * (n - k < k ? fact_inv(k) * fact_inv(n - k) : fact_inv(n - k) * fact_inv(k)); } static MInt nPk(const int n, const int k) { return n < 0 || n < k || k < 0 ? 0 : fact(n) * fact_inv(n - k); } static MInt nHk(const int n, const int k) { return n < 0 || k < 0 ? 0 : (k == 0 ? 1 : nCk(n + k - 1, k)); } static MInt large_nCk(long long n, const int k) { if (n < 0 || n < k || k < 0) return 0; inv(k, true); MInt res = 1; for (int i = 1; i <= k; ++i) { res *= inv(i) * n--; } return res; } MInt pow(long long exponent) const { MInt res = 1, tmp = *this; for (; exponent > 0; exponent >>= 1) { if (exponent & 1) res *= tmp; tmp *= tmp; } return res; } MInt& operator+=(const MInt& x) { if ((v += x.v) >= M) v -= M; return *this; } MInt& operator-=(const MInt& x) { if ((v += M - x.v) >= M) v -= M; return *this; } MInt& operator*=(const MInt& x) { v = static_cast<unsigned long long>(v) * x.v % M; return *this; } MInt& operator/=(const MInt& x) { return *this *= inv(x.v); } bool operator==(const MInt& x) const { return v == x.v; } bool operator!=(const MInt& x) const { return v != x.v; } bool operator<(const MInt& x) const { return v < x.v; } bool operator<=(const MInt& x) const { return v <= x.v; } bool operator>(const MInt& x) const { return v > x.v; } bool operator>=(const MInt& x) const { return v >= x.v; } MInt& operator++() { if (++v == M) v = 0; return *this; } MInt operator++(int) { const MInt res = *this; ++*this; return res; } MInt& operator--() { v = (v == 0 ? M - 1 : v - 1); return *this; } MInt operator--(int) { const MInt res = *this; --*this; return res; } MInt operator+() const { return *this; } MInt operator-() const { return MInt(v ? M - v : 0); } MInt operator+(const MInt& x) const { return MInt(*this) += x; } MInt operator-(const MInt& x) const { return MInt(*this) -= x; } MInt operator*(const MInt& x) const { return MInt(*this) *= x; } MInt operator/(const MInt& x) const { return MInt(*this) /= x; } friend std::ostream& operator<<(std::ostream& os, const MInt& x) { return os << x.v; } friend std::istream& operator>>(std::istream& is, MInt& x) { long long v; is >> v; x = MInt(v); return is; } }; using ModInt = MInt<MOD>; template <int N> struct BinaryMatrix { explicit BinaryMatrix(const int m, const int n = N, const bool def = false) : n(n), data(m, std::bitset<N>(std::string(n, def ? '1' : '0'))) {} int nrow() const { return data.size(); } int ncol() const { return n; } BinaryMatrix pow(long long exponent) const { BinaryMatrix res(n, n), tmp = *this; for (int i = 0; i < n; ++i) { res[i].set(i); } for (; exponent > 0; exponent >>= 1) { if (exponent & 1) res *= tmp; tmp *= tmp; } return res; } inline const std::bitset<N>& operator[](const int i) const { return data[i]; } inline std::bitset<N>& operator[](const int i) { return data[i]; } BinaryMatrix& operator=(const BinaryMatrix& x) = default; BinaryMatrix& operator+=(const BinaryMatrix& x) { const int m = nrow(); for (int i = 0; i < m; ++i) { data[i] ^= x[i]; } return *this; } BinaryMatrix& operator*=(const BinaryMatrix& x) { const int m = nrow(), l = x.ncol(); BinaryMatrix t_x(l, n), res(m, l); for (int i = 0; i < l; ++i) { for (int j = 0; j < n; ++j) { t_x[i][j] = x[j][i]; } } for (int i = 0; i < m; ++i) { for (int j = 0; j < l; ++j) { if ((data[i] & t_x[j]).count() & 1) res[i].set(j); } } return *this = res; } BinaryMatrix operator+(const BinaryMatrix& x) const { return BinaryMatrix(*this) += x; } BinaryMatrix operator*(const BinaryMatrix& x) const { return BinaryMatrix(*this) *= x; } private: int n; std::vector<std::bitset<N>> data; }; template <int N> int gauss_jordan(BinaryMatrix<N>* a, const bool is_extended = false) { const int m = a->nrow(), n = a->ncol(); int rank = 0; for (int col = 0; col < (is_extended ? n - 1 : n); ++col) { int pivot = -1; for (int row = rank; row < m; ++row) { if ((*a)[row][col]) { pivot = row; break; } } if (pivot == -1) continue; std::swap((*a)[rank], (*a)[pivot]); for (int row = 0; row < m; ++row) { if (row != rank && (*a)[row][col]) (*a)[row] ^= (*a)[rank]; } ++rank; } return rank; } int main() { constexpr int N = 1000; int n, m; cin >> n >> m; BinaryMatrix<N> matrix(m, n); REP(i, m) { int l; cin >> l; while (l--) { int a; cin >> a; --a; matrix[i].flip(a); } } cout << ModInt(2).pow(gauss_jordan(&matrix) + 1) << '\n'; return 0; // // unordered_set<bitset<N>> p_x{0, bitset<N>((1 << N) - 1)}, que{"10000", "11000"}; // これはバグる // unordered_set<bitset<N>> p_x{0, bitset<N>((1 << N) - 1)}, que; // while (!que.empty()) { // const bitset<N> cur = *que.begin(); // que.erase(que.begin()); // bitset<N> pr = cur; // pr.flip(); // if (!p_x.count(pr) && !que.count(pr)) que.emplace(pr); // for (const bitset<N> x : p_x) { // const bitset<N> nxt = cur | x; // if (nxt != cur && !p_x.count(nxt) && !que.count(nxt)) que.emplace(nxt); // } // p_x.emplace(cur); // } // cout << p_x.size() << '\n'; // for (const auto x : p_x) cout << x << '\n'; }