結果
| 問題 |
No.1073 無限すごろく
|
| コンテスト | |
| ユーザー |
|
| 提出日時 | 2024-06-23 18:28:58 |
| 言語 | C++23 (gcc 13.3.0 + boost 1.87.0) |
| 結果 |
AC
|
| 実行時間 | 2 ms / 2,000 ms |
| コード長 | 4,173 bytes |
| コンパイル時間 | 2,633 ms |
| コンパイル使用メモリ | 146,864 KB |
| 実行使用メモリ | 6,948 KB |
| 最終ジャッジ日時 | 2024-06-23 18:29:02 |
| 合計ジャッジ時間 | 3,847 ms |
|
ジャッジサーバーID (参考情報) |
judge3 / judge4 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 3 |
| other | AC * 30 |
ソースコード
#include <algorithm>
#include <cassert>
#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <cmath>
#include <iostream>
#include <numeric>
#include <vector>
#include <map>
#include <set>
#include <queue>
#include <functional>
#include <iomanip>
using namespace std;
using ll = long long;
class range {private: struct I{int x;int operator*(){return x;}bool operator!=(I& lhs){return x<lhs.x;}void operator++(){++x;}};I i,n;
public:range(int n_):i({0}),n({n_}){}range(int i_,int n_):i({i_}),n({n_}){}I& begin(){return i;}I& end(){return n;}};
template<typename T, typename U> ostream& operator<<(ostream& os, const pair<T, U>& p){ return os << "{" << p.first << ", " << p.second << "}"; }
template<typename T> ostream& operator<<(ostream& os, const vector<T>& obj) { os << "{"; for (const auto& e : obj) os << e << ", "; return os << "}"; }
template<typename T> ostream& operator<<(ostream& os, const set<T>& obj) { os << "set{"; for (const auto& e : obj) os << e << ", "; return os << "}"; }
template<typename T, typename U> ostream& operator<<(ostream& os, const map<T, U>& obj) { os << "map{"; for (const auto& e : obj) os << e << ", "; return os << "}"; }
template<typename T> void take(vector<T>& vec, int n) { vec.resize(n); for (int i = 0; i < n; ++i) cin >> vec[i]; }
#ifdef ONLINE_JUDGE
#define dump(expr) ;
#else
#define dump(expr) { cerr << "\033[33m#L" << __LINE__ << ": " << expr << "\033[39m" << endl; }
#endif
const ll mod = 1000000007;
struct mint {
ll x;
mint(ll x_ = 0) : x((x_ % mod + mod) % mod) {}
mint operator-() const { return mint(-x); }
mint &operator+=(const mint &a) { if ((x += a.x) >= mod) x -= mod; return *this; }
mint &operator-=(const mint &a) { if ((x += mod - a.x) >= mod) x -= mod; return *this; }
mint &operator*=(const mint &a) { (x *= a.x) %= mod; return *this; }
mint operator+(const mint &a) const { mint res(*this); return res += a; }
mint operator-(const mint &a) const { mint res(*this); return res -= a; }
mint operator*(const mint &a) const { mint res(*this); return res *= a; }
mint pow(ll t) const { if (!t) return 1; mint a = pow(t >> 1); a *= a; if (t & 1) a *= *this; return a; }
mint inv() const { return pow(mod - 2); }
mint &operator/=(const mint &a) { return (*this) *= a.inv(); }
mint operator/(const mint &a) const { mint res(*this); return res /= a; }
friend ostream &operator<<(ostream &os, const mint &m) { os << m.x; return os; }
friend istream &operator>>(istream &is, mint &m) { is >> m.x; return is; }
};
using Field = mint;
typedef vector<mint> Vec;
typedef vector<Vec> Mat;
Mat mul(Mat mat1, Mat mat2) {
int h = mat1.size(), in = mat1[0].size(), w = mat2[0].size();
assert((int)mat2.size() == in);
Mat ret(h, Vec(w, 0));
for (int y : range(h)) for (int x : range(w)) for (int i : range(in)) {
ret[y][x] += mat1[y][i] * mat2[i][x];
}
return ret;
}
Mat pow(Mat mat, ll power) {
int n = mat.size();
Mat ret(n, Vec(n, 0));
for (int i : range(n)) ret[i][i] = 1;
while (power > 0) {
if (power & 1)
ret = mul(ret, mat);
mat = mul(mat, mat);
power >>= 1;
}
return ret;
}
namespace solver {
template<typename T1, typename T2> struct In2 {
T1 a; T2 b;
friend std::istream& operator>>(std::istream& is, In2& obj) { T1 t1; T2 t2; is >> t1 >> t2; obj = {t1, t2}; return is; }
};
template<typename T1, typename T2, typename T3> struct In3 {
T1 a; T2 b; T3 c;
friend std::istream& operator>>(std::istream& is, In3& obj) { T1 t1; T2 t2; T3 t3; is >> t1 >> t2 >> t3; obj = {t1, t2, t3}; return is; }
};
ll n;
void read() {
cin >> n;
}
using RetType = mint;
RetType run() {
Mat A(6, Vec(6, 0));
for (int i : range(6)) A[i][0] = mint(1) / 6;
for (int i : range(5)) A[i][i + 1] = 1;
Mat P = pow(A, n);
return P[0][0];
}
} // namespace
template <typename F>
void run(F f) { if constexpr (std::is_same_v<decltype(f()), void>) f(); else cout << f() << endl; }
int main(int argc, char** argv) {
cerr << fixed << setprecision(12);
cout << fixed << setprecision(12);
int testcase = 1;
if (argc > 1) testcase = atoi(argv[1]);
while (testcase--) {
solver::read();
}
run(solver::run);
}