結果
| 問題 |
No.1189 Sum is XOR
|
| コンテスト | |
| ユーザー |
|
| 提出日時 | 2020-08-22 18:02:40 |
| 言語 | C++14 (gcc 13.3.0 + boost 1.87.0) |
| 結果 |
AC
|
| 実行時間 | 29 ms / 2,000 ms |
| コード長 | 3,436 bytes |
| コンパイル時間 | 1,732 ms |
| コンパイル使用メモリ | 173,796 KB |
| 実行使用メモリ | 5,248 KB |
| 最終ジャッジ日時 | 2024-10-15 11:54:42 |
| 合計ジャッジ時間 | 3,094 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 * 2 |
| other | AC * 21 |
ソースコード
#include <bits/stdc++.h>
#define rep(i,n) for (int i = 0; i < (int)(n); i ++)
#define irep(i,n) for (int i = (int)(n) - 1;i >= 0;--i)
using namespace std;
using ll = long long;
using PL = pair<ll,ll>;
using P = pair<int,int>;
constexpr int INF = 1000000000;
constexpr long long HINF = 1000000000000000;
constexpr long long MOD = 1000000007;// = 998244353;
constexpr double EPS = 1e-4;
constexpr double PI = 3.14159265358979;
template<int Modulus>
struct ModInt {
long long x;
ModInt(long long x = 0) :x((x%Modulus + Modulus)%Modulus) {}
constexpr ModInt &operator+=(const ModInt a) {if ((x += a.x) >= Modulus) x -= Modulus; return *this;}
constexpr ModInt &operator-=(const ModInt a) {if ((x += Modulus - a.x) >= Modulus) x -= Modulus; return *this;}
constexpr ModInt &operator*=(const ModInt a) {(x *= a.x) %= Modulus; return *this;}
constexpr ModInt &operator/=(const ModInt a) {return *this *= a.inverse();}
constexpr ModInt operator+(const ModInt a) const {return ModInt(*this) += a.x;}
constexpr ModInt operator-(const ModInt a) const {return ModInt(*this) -= a.x;}
constexpr ModInt operator*(const ModInt a) const {return ModInt(*this) *= a.x;}
constexpr ModInt operator/(const ModInt a) const {return ModInt(*this) /= a.x;}
friend constexpr ostream& operator<<(ostream& os,const ModInt<Modulus>& a) {return os << a.x;}
friend constexpr istream& operator>>(istream& is,ModInt<Modulus>& a) {return is >> a.x;}
ModInt inverse() const {// x ^ (-1)
long long a = x,b = Modulus,p = 1,q = 0;
while (b) {long long d = a/b; a -= d*b; swap(a,b); p -= d*q; swap(p,q);}
return ModInt(p);
}
ModInt pow(long long N) {// x ^ N
ModInt a = 1;
while (N) {
if (N&1) a *= *this;
*this *= *this;
N >>= 1;
}
return a;
}
};
using mint = ModInt<998244353>;
struct Combination {
int N;
//using mint = ModInt<1000000007>;
//using mint = ModInt<998244353>;
vector<mint> fact,ifact,invs;
Combination(int N): N(N) {
fact.resize(N + 1); ifact.resize(N + 1);
fact[0] = fact[1] = 1;
ifact[0] = ifact[1] = 1;
for (int i = 2;i < N + 1;++i) {fact[i] = fact[i - 1] * i;}
ifact[N] = fact[N].inverse();
for (int i = N;i >= 1;--i) {ifact[i - 1] = ifact[i] * i;}
}
void invs_build() {
invs.resize(N + 1);
invs[1] = 1;
for (int i = 2;i < N + 1;++i) invs[i] = fact[i] * ifact[i - 1];
}
mint operator()(int n, int k) {
if (k < 0 || k > n) return 0;
return fact[n]*ifact[k]*ifact[n - k];
}
mint npk(int n,int k) {
if (k < 0 || k > n) return 0;
return fact[n]*ifact[n - k];
}
};
int main() {
cin.tie(nullptr);
ios::sync_with_stdio(false);
int N,K; cin >> N >> K;
vector<mint> A(1 << 10,0);
rep(i,N) {
int a; cin >> a;
A[a] += 1;
}
if (K > 10) {
cout << 0 << '\n';
return 0;
}
vector<vector<mint>> dp(K + 1,vector<mint>(1 << 10,0));
rep(i,1<<10) dp[0][0] = 1;
rep(i,1<<10) {
vector<vector<mint>> now = dp;
rep(j,K) {
rep(k,1<<10) {
if ((k&i) == i) now[j + 1][k] += dp[j][k^i] * A[i];
}
}
swap(now,dp);
}
mint ans = 0;
rep(i,1<<10) ans += dp[K][i];
cout << ans << '\n';
return 0;
}