結果

問題 No.803 Very Limited Xor Subset
ユーザー はまやんはまやん
提出日時 2019-03-23 12:40:04
言語 C++14
(gcc 13.3.0 + boost 1.87.0)
結果
AC  
実行時間 3 ms / 2,000 ms
コード長 4,195 bytes
コンパイル時間 1,887 ms
コンパイル使用メモリ 176,048 KB
実行使用メモリ 6,944 KB
最終ジャッジ日時 2024-09-22 04:53:43
合計ジャッジ時間 3,162 ms
ジャッジサーバーID
(参考情報)
judge4 / judge2
このコードへのチャレンジ
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ファイルパターン 結果
sample AC * 4
other AC * 43
権限があれば一括ダウンロードができます

ソースコード

diff #
プレゼンテーションモードにする

#include<bits/stdc++.h>
#define rep(i,a,b) for(int i=a;i<b;i++)
#define rrep(i,a,b) for(int i=a;i>=b;i--)
#define fore(i,a) for(auto &i:a)
#define all(x) (x).begin(),(x).end()
//#pragma GCC optimize ("-O3")
using namespace std; void _main(); int main() { cin.tie(0); ios::sync_with_stdio(false); _main(); }
typedef long long ll; const int inf = INT_MAX / 2; const ll infl = 1LL << 60;
template<class T>bool chmax(T &a, const T &b) { if (a<b) { a = b; return 1; } return 0; }
template<class T>bool chmin(T &a, const T &b) { if (b<a) { a = b; return 1; } return 0; }
//---------------------------------------------------------------------------------------------------
template<int MOD> struct ModInt {
static const int Mod = MOD; unsigned x; ModInt() : x(0) { }
ModInt(signed sig) { x = sig < 0 ? sig % MOD + MOD : sig % MOD; }
ModInt(signed long long sig) { x = sig < 0 ? sig % MOD + MOD : sig % MOD; }
int get() const { return (int)x; }
ModInt &operator+=(ModInt that) { if ((x += that.x) >= MOD) x -= MOD; return *this; }
ModInt &operator-=(ModInt that) { if ((x += MOD - that.x) >= MOD) x -= MOD; return *this; }
ModInt &operator*=(ModInt that) { x = (unsigned long long)x * that.x % MOD; return *this; }
ModInt &operator/=(ModInt that) { return *this *= that.inverse(); }
ModInt operator+(ModInt that) const { return ModInt(*this) += that; }
ModInt operator-(ModInt that) const { return ModInt(*this) -= that; }
ModInt operator*(ModInt that) const { return ModInt(*this) *= that; }
ModInt operator/(ModInt that) const { return ModInt(*this) /= that; }
ModInt inverse() const { long long a = x, b = MOD, u = 1, v = 0;
while (b) { long long t = a / b; a -= t * b; std::swap(a, b); u -= t * v; std::swap(u, v); }
return ModInt(u); }
bool operator==(ModInt that) const { return x == that.x; }
bool operator!=(ModInt that) const { return x != that.x; }
ModInt operator-() const { ModInt t; t.x = x == 0 ? 0 : Mod - x; return t; }
};
template<int MOD> ostream& operator<<(ostream& st, const ModInt<MOD> a) { st << a.get(); return st; };
template<int MOD> ModInt<MOD> operator^(ModInt<MOD> a, unsigned long long k) {
ModInt<MOD> r = 1; while (k) { if (k & 1) r *= a; a *= a; k >>= 1; } return r; }
typedef ModInt<1000000007> mint;
#define BS 303
pair<int, vector<bitset<BS>>> gaussianEliminationXor(vector<bitset<BS>> x) {
int rank = 0;
rep(i, 0, BS) {
int m = -1;
for (int j = rank; j < x.size(); j++) {
if (x[j][i]) {
m = j;
break;
}
}
if (m == -1) continue;
swap(x[rank], x[m]);
for (int j = 0; j < x.size(); j++) {
if (rank != j && x[j][i]) {
x[j] ^= x[rank];
}
}
rank++;
}
return { rank, x };
}
/*---------------------------------------------------------------------------------------------------
           _
     _ ´<_   Welcome to My Coding Space!
     ´_` /  ⌒i
           | |
    /   //  |
  __(__ニ/  _/ .| .|____
     /____/ u 
---------------------------------------------------------------------------------------------------*/
int N, M, X, A[303];
//---------------------------------------------------------------------------------------------------
void _main() {
cin >> N >> M >> X;
rep(i, 0, N) cin >> A[i];
vector<bitset<BS>> v;
rep(d, 0, 30) {
bitset<BS> b;
rep(i, 0, N) if (A[i] & (1 << d)) b.set(i);
if (X & (1 << d)) b.set(N);
v.push_back(b);
}
rep(m, 0, M) {
int t, l, r; cin >> t >> l >> r;
l--;
bitset<BS> b;
rep(i, l, r) b.set(i);
if (t == 1) b.set(N);
v.push_back(b);
}
auto p = gaussianEliminationXor(v);
fore(b, p.second) if (b.count() == 1 and b[N]) {
cout << 0 << endl;
return;
}
mint ans = mint(2) ^ (N - p.first);
cout << ans << endl;
}
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