結果
| 問題 |
No.1142 XOR と XOR
|
| ユーザー |
|
| 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;
}