結果
| 問題 | No.803 Very Limited Xor Subset |
| コンテスト | |
| ユーザー |
|
| 提出日時 | 2019-09-16 21:21:43 |
| 言語 | C++14 (gcc 13.3.0 + boost 1.89.0) |
| 結果 |
AC
|
| 実行時間 | 5 ms / 2,000 ms |
| コード長 | 4,119 bytes |
| 記録 | |
| コンパイル時間 | 930 ms |
| コンパイル使用メモリ | 107,652 KB |
| 実行使用メモリ | 7,040 KB |
| 最終ジャッジ日時 | 2024-07-07 02:32:09 |
| 合計ジャッジ時間 | 2,126 ms |
|
ジャッジサーバーID (参考情報) |
judge3 / judge2 |
(要ログイン)
| ファイルパターン | 結果 |
|---|---|
| sample | AC * 4 |
| other | AC * 43 |
ソースコード
#include <algorithm>
#include <bitset>
#include <cassert>
#include <cmath>
#include <iostream>
#include <map>
#include <queue>
#include <unordered_map>
#include <vector>
#include <string.h>
using namespace std;
#define COUT(x) cout << #x << " = " << (x) << " (L" << __LINE__ << ")" << endl
#define rep(i, n) for(int i = 0; i < n; ++i)
#define all(s) s.begin(), s.end()
int dx[] = { 1, -1, 0, 0 };
int dy[] = { 0, 0, 1, -1 };
typedef long long ll;
typedef unsigned long long ull;
typedef pair<ll, ll> P;
typedef tuple<int, int, int> triple;
typedef double D;
int gcd(int a, int b) {
if (a < b) { swap(a, b); }
if (b == 0) { return a; }
return gcd(b, a % b);
}
bool prime(int n) {
for (int i = 2; i <= sqrt(n); ++i) {
if (n % i == 0) { return false; }
}
return n != 1;
}
template<class T> inline bool chmax(T& a, T b) { if (a < b) { a = b; return true; } return false; }
template<class T> inline bool chmin(T& a, T b) { if (a > b) { a = b; return true; } return false; }
const ll INF = 1e9;
const ll MOD = 1000000007; // 1e9 + 7
ll powmod(ll x, ll n) { // like pow(x, n)
ll r = 1;
while (n) {
if (n & 1) {
r = r * x % MOD;
}
x = x * x % MOD;
n >>= 1;
}
return r;
}
const int COM_MAX = 500010;
ll fac[COM_MAX], facinv[COM_MAX], inv[COM_MAX];
void COMinit() {
fac[0] = fac[1] = 1;
facinv[0] = facinv[1] = 1;
inv[1] = 1;
for(int i = 2; i < COM_MAX; ++i) {
fac[i] = fac[i-1] * i % MOD;
inv[i] = MOD - inv[MOD%i] * (MOD / i) % MOD;
facinv[i] = facinv[i-1] * inv[i] % MOD;
}
}
ll COM(ll n, ll k) {
return (fac[n] * facinv[k] % MOD) * facinv[n-k] % MOD;
}
ll PERM(ll n, ll k) {
return (fac[n] * facinv[k] % MOD);
}
const int MAX_ROW = 3010; // To be set appropriately.
const int MAX_COL = 3010; // To be set appropriately.
class BitMatrix {
public:
BitMatrix(int m = 1, int n = 1) : H(m), W(n) {}
inline bitset<MAX_COL>& operator [] (int i) { return val[i]; }
int H, W;
private:
bitset<MAX_COL> val[MAX_ROW];
};
ostream& operator << (ostream& s, BitMatrix A) {
s << endl;
rep(i, A.H) {
rep(j, A.W) {
s << A[i][j] << ", ";
}
s << endl;
}
return s;
}
int GaussJordan(BitMatrix &A, bool is_extended = false) {
int rank = 0;
rep(col, A.W) {
if (is_extended && col == A.W - 1) { break; }
int pivot = -1;
for (int row = rank; row < A.H; ++row) {
if (A[row][col]) {
pivot = row;
break;
}
}
if (pivot == -1) continue;
swap(A[pivot], A[rank]);
rep(row, A.H) {
if (row != rank && A[row][col]) {
A[row] ^= A[rank];
}
}
++rank;
}
return rank;
}
int linear_equation(BitMatrix A, vector<int> b, vector<int> &res) {
int m = A.H, n = A.W;
BitMatrix M(m, n + 1);
rep(i, m) {
rep(j, n) {
M[i][j] = A[i][j];
}
M[i][n] = b[i];
}
int rank = GaussJordan(M, true);
// check if it has no solution
for (int row = rank; row < m; ++row) {
if (M[row][n]) { return -1; }
}
// answer
res.assign(n, 0);
rep(i, rank) {
res[i] = M[i][n];
}
return rank;
}
const int DIGIT = 35; // 10^9 ~ 2^30
int main(int argc, char** argv) {
int N, M, X;
cin >> N >> M >> X;
vector<ll> a(N);
rep(i, N) {
cin >> a[i];
}
vector<triple> tlr;
rep(i, M) {
int type, l, r;
cin >> type >> l >> r;
--l; --r;
tlr.push_back(triple(type, l, r));
}
BitMatrix A(DIGIT + M, N); // extend matrix with M conditions.
// COUT(A);
vector<int> b(DIGIT + M);
// Set DIGIT rows.
rep(d, DIGIT) {
rep(i, N) {
if (a[i] & (1LL << d)) {
A[d][i] = 1;
}
}
if (X & (1LL << d)) {
b[d] = 1;
}
}
// Set M rows.
rep(row, M) {
triple t = tlr[row];
int type = get<0>(t);
int l = get<1>(t);
int r = get<2>(t);
rep(i, N) {
if (l <= i && i <= r) {
A[DIGIT + row][i] = 1;
}
}
b[DIGIT + row] = type;
}
// COUT(A);
vector<int> res;
int rank = linear_equation(A, b, res);
// COUT(rank);
if (rank == -1) {
cout << 0 << endl;
} else {
cout << powmod(2LL, N - rank) << endl;
}
}