結果
問題 | No.1142 XOR と XOR |
ユーザー | fine |
提出日時 | 2020-07-31 22:07:36 |
言語 | C++14 (gcc 13.3.0 + boost 1.87.0) |
結果 |
AC
|
実行時間 | 38 ms / 2,000 ms |
コード長 | 3,822 bytes |
コンパイル時間 | 1,698 ms |
コンパイル使用メモリ | 169,112 KB |
実行使用メモリ | 5,248 KB |
最終ジャッジ日時 | 2024-11-08 03:27:18 |
合計ジャッジ時間 | 3,443 ms |
ジャッジサーバーID (参考情報) |
judge2 / judge5 |
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ファイルパターン | 結果 |
---|---|
sample | AC * 3 |
other | AC * 25 |
ソースコード
#include <bits/stdc++.h> using namespace std; using ll = long long; constexpr char newl = '\n'; // https://noshi91.hatenablog.com/entry/2019/03/31/174006 template <std::uint_fast64_t Modulus> struct ModInt { using u64 = std::uint_fast64_t; static constexpr u64 MOD = Modulus; u64 val; constexpr ModInt(const u64 x = 0) noexcept : val(x % MOD) {} constexpr ModInt operator+() const noexcept { return ModInt(*this); } constexpr ModInt operator-() const noexcept { ModInt res(*this); if (res.val != 0) res.val = MOD - res.val; return res; } constexpr bool operator==(const ModInt& rhs) const noexcept { return val == rhs.val; } constexpr bool operator!=(const ModInt& rhs) const noexcept { return val != rhs.val; } // prefix increment/decrement constexpr ModInt& operator++() noexcept { return *this += ModInt(1); } constexpr ModInt& operator--() noexcept { return *this -= ModInt(1); } // postfix increment/decrement constexpr ModInt operator++(int) noexcept { ModInt tmp(*this); ++*this; return tmp; } constexpr ModInt operator--(int) noexcept { ModInt tmp(*this); --*this; return tmp; } constexpr ModInt operator+(const ModInt& rhs) const noexcept { return ModInt(*this) += rhs; } constexpr ModInt operator-(const ModInt& rhs) const noexcept { return ModInt(*this) -= rhs; } constexpr ModInt operator*(const ModInt& rhs) const noexcept { return ModInt(*this) *= rhs; } constexpr ModInt operator/(const ModInt& rhs) const noexcept { return ModInt(*this) /= rhs; } constexpr ModInt& operator+=(const ModInt& rhs) noexcept { val += rhs.val; if (val >= MOD) val -= MOD; return *this; } constexpr ModInt& operator-=(const ModInt& rhs) noexcept { if (val < rhs.val) val += MOD; val -= rhs.val; return *this; } constexpr ModInt& operator*=(const ModInt& rhs) noexcept { val = val * rhs.val % MOD; return *this; } // prime Modulus only constexpr ModInt& operator/=(const ModInt& rhs) noexcept { return *this *= rhs.inv(); } // prime Modulus only constexpr ModInt inv() const noexcept { return pow(*this, MOD - 2); } }; template<std::uint_fast64_t Modulus> constexpr ModInt<Modulus> pow(ModInt<Modulus> x, std::uint_fast64_t n) { ModInt<Modulus> res(1); while (n) { if (n & 1) res *= x; x *= x; n >>= 1; } return res; } template<std::uint_fast64_t Modulus> istream& operator>>(istream& is, ModInt<Modulus>& x) { std::uint_fast64_t val; is >> val; x = ModInt<Modulus>(val); return is; } template<std::uint_fast64_t Modulus> ostream& operator<<(ostream& os, const ModInt<Modulus>& x) { return os << x.val; } using mint = ModInt<1000000007>; array<mint, 1024> calc(const vector<int>& a) { array<mint, 1024> cnt{}; ++cnt[0]; int sum = 0; for (int x : a) { sum ^= x; ++cnt[sum]; } array<mint, 1024> res; for (int i = 0; i < 1024; i++) { for (int j = 0; j < i; j++) { res[i ^ j] += cnt[i] * cnt[j]; } res[0] += cnt[i] * (cnt[i] - 1) / mint(2); } return res; } int main() { cin.tie(nullptr); ios::sync_with_stdio(false); int n, m, K; cin >> n >> m >> K; vector<int> a(n); for (int i = 0; i < n; i++) { cin >> a[i]; } vector<int> b(m); for (int i = 0; i < m; i++) { cin >> b[i]; } array<mint, 1024> va = calc(a); auto vb = calc(b); mint ans = 0; for (int i = 0; i < 1024; i++) { ans += va[i] * vb[K ^ i]; } cout << ans << newl; return 0; }