結果
| 問題 | No.1142 XOR と XOR |
| コンテスト | |
| ユーザー |
|
| 提出日時 | 2020-07-31 22:05:30 |
| 言語 | C++17 (gcc 13.3.0 + boost 1.87.0) |
| 結果 |
AC
|
| 実行時間 | 123 ms / 2,000 ms |
| コード長 | 3,933 bytes |
| コンパイル時間 | 2,088 ms |
| コンパイル使用メモリ | 197,224 KB |
| 最終ジャッジ日時 | 2025-01-12 10:12:28 |
|
ジャッジサーバーID (参考情報) |
judge5 / judge4 |
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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;
#define rep(i, n) for(int i = 0; i < n; i++)
#define rep2(i, x, n) for(int i = x; i <= n; i++)
#define rep3(i, x, n) for(int i = x; i >= n; i--)
#define elif else if
#define sp(x) fixed << setprecision(x)
#define pb push_back
#define eb emplace_back
#define all(x) x.begin(), x.end()
#define sz(x) (int)x.size()
using ll = long long;
using ld = long double;
using pii = pair<int, int>;
using pil = pair<int, ll>;
using pli = pair<ll, int>;
using pll = pair<ll, ll>;
const ll MOD = 1e9+7;
//const ll MOD = 998244353;
const int inf = (1<<30)-1;
const ll INF = (1LL<<60)-1;
const ld EPS = 1e-10;
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<ll mod>
struct Mod_Int{
ll x;
Mod_Int() {}
Mod_Int(ll y) : x (y >= 0 ? y % mod : (mod - (-y) % mod) % mod) {}
Mod_Int &operator += (const Mod_Int &p){
x = (x + p.x) % mod;
return *this;
}
Mod_Int &operator -= (const Mod_Int &p){
x = (x + mod - p.x) % mod;
return *this;
}
Mod_Int &operator *= (const Mod_Int &p){
x = (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 pow(ll n) const{
Mod_Int now = *this, ret = 1;
while(n > 0){
if(n & 1) ret *= now;
now *= now, n >>= 1;
}
return ret;
}
Mod_Int inverse() const{
return pow(mod-2);
}
friend ostream &operator << (ostream &os, const Mod_Int &p){
return os << p.x;
}
friend istream &operator >> (istream &is, Mod_Int &p){
ll a;
is >> a;
p = Mod_Int<mod>(a);
return is;
}
};
using mint = Mod_Int<MOD>;
const int MAX_N = 1e6;
mint fac[MAX_N+1], ifac[MAX_N+1];
void init(){
fac[0] = 1;
rep2(i, 1, MAX_N){
fac[i] = fac[i-1]*i;
}
ifac[MAX_N] = fac[MAX_N].inverse();
rep3(i, MAX_N, 1){
ifac[i-1] = ifac[i]*i;
}
}
mint comb(int n, int k){
return fac[n]*ifac[n-k]*ifac[k];
}
mint perm(int n, int k){
return fac[n]*ifac[n-k];
}
int main(){
int N, M, K;
cin >> N >> M >> K;
int a[N], b[M];
rep(i, N) cin >> a[i];
rep(i, M) cin >> b[i];
vector<mint> memo(1024, 0), A(1024, 0), B(1024, 0);
int sum = 0;
memo[0]++;
rep(i, N){
sum ^= a[i];
memo[sum]++;
}
rep(i, 1024){
A[0] += memo[i]*(memo[i]-1)/(mint)2;
rep2(j, i+1, 1023){
A[i^j] += memo[i]*memo[j];
}
}
fill(all(memo), 0);
sum = 0;
memo[0]++;
rep(i, M){
sum ^= b[i];
memo[sum]++;
}
rep(i, 1024){
B[0] += memo[i]*(memo[i]-1)/(mint)2;
rep2(j, i+1, 1023){
B[i^j] += memo[i]*memo[j];
}
}
mint ans = 0;
rep(i, 1024){
rep(j, 1024){
if((i^j) == K) ans += A[i]*B[j];
}
}
cout << ans << endl;
}