結果
| 問題 |
No.3228 Very Large Fibonacci Sum
|
| コンテスト | |
| ユーザー |
Yudai0606Nazo
|
| 提出日時 | 2025-08-08 21:56:46 |
| 言語 | C++17 (gcc 13.3.0 + boost 1.87.0) |
| 結果 |
AC
|
| 実行時間 | 2 ms / 2,000 ms |
| コード長 | 3,667 bytes |
| コンパイル時間 | 4,581 ms |
| コンパイル使用メモリ | 260,144 KB |
| 実行使用メモリ | 7,716 KB |
| 最終ジャッジ日時 | 2025-08-08 21:56:57 |
| 合計ジャッジ時間 | 5,053 ms |
|
ジャッジサーバーID (参考情報) |
judge2 / judge4 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 3 |
| other | AC * 23 |
ソースコード
#ifndef ONLINE_JUDGE
#define _GLIBCXX_DEBUG
#endif
#include <bits/stdc++.h>
#include <cassert>
#include <atcoder/all>
using namespace std;
using namespace atcoder;
using ll = long long;
//using mint = modint998244353;
using mint = modint1000000007;
#define rep(i, n) for (int i = 0; i < (int)(n); i++)
#define repu(i, s, t) for (int i = (int)(s); i < (int)(t); i++)
#define repd(i, s, t) for (int i = (int)(s)-1; i >= (int)(t); i--)
#define all(v) v.begin(), v.end()
void _u() { cerr << endl; } template <class H, class... T> void _u(H&& h, T&&... t) { cerr << h << ", "; _u(move(t)...); }
#define U(...) { cerr << #__VA_ARGS__ << ": "; _u(__VA_ARGS__); }
template<typename T> bool chmax(T &a, const T b) { if(a >= b) return false; a = b; return true; }
template<typename T> bool chmin(T &a, const T b) { if(a <= b) return false; a = b; return true; }
template<typename T> istream& operator>>(istream &in, vector<T> &a) { for(T &x: a) in >> x; return in; }
template<typename T> ostream& operator<<(ostream &out, const vector<T> &a) { for(const T &x: a) out << x << ' '; return out; }
const int di[] = {1, 0, -1, 0, 1, 1, -1, -1, 0};
const int dj[] = {0, 1, 0, -1, -1, 1, 1, -1, 0};
template <typename T=double>
struct Matrix {
vector<vector<T>> mat;
int m, n;
Matrix(initializer_list<initializer_list<T>> init) {
mat.resize(0);
for(const auto &row : init) {
mat.emplace_back(row);
}
m = mat.size();
n = mat.empty() ? 0 : mat[0].size();
}
Matrix(vector<vector<T>> &mat_): mat(mat_), m(int(mat_.size())), n(mat.empty() ? 0 : int(mat_[0].size())) {}
Matrix(int x, int y):mat(vector(x, vector<T>(y))), m(x), n(y) {}
Matrix(int x): m(x), n(x) {
mat = vector(x, vector<T> (x));
rep(i, x) mat[i][i] = 1;
}
vector<T> &operator[](int x) { return mat[x]; }
Matrix<T> &operator+=(const Matrix<T> &other) {
assert(m == other.m && n == other.n);
rep(i, m) rep(j, n) *this[i][j] += other[i][j];
return *this;
}
Matrix<T> operator+(const Matrix<T> &other) { return Matrix<T>(*this) += other; }
Matrix<T> &operator*=(const Matrix<T> &other) { return *this = *this * other; }
Matrix<T> operator*(const Matrix<T> &other) {
assert(n == other.m);
Matrix<T> result(m, other.n);
rep(i, m) rep(j, other.n) rep(k, n) result.mat[i][j] += mat[i][k] * other.mat[k][j];
return result;
}
Matrix<T> pow(ll x) {
assert(m == n);
if(x == 0) return Matrix<T>(m);
Matrix<T> result = pow(x / 2);
result = result * result;
return (x % 2 == 0 ? result : result * *this);
}
T dat() {
assert(m == n);
T result = 1;
rep(i, m) {
int pivot = -1;
repu(j, i, m) if(mat[j][i] != 0) {
pivot = j;
break;
}
if(pivot == -1) return 0;
if(pivot != i) {
swap(mat[i], mat[pivot]);
result *= -1;
}
result *= mat[i][i];
T inv = 1 / mat[i][i];
repu(j, i + 1, m) {
T factor = mat[j][i] * inv;
repu(k, i, n) mat[j][k] -= mat[i][k] * factor;
}
}
return result;
}
};
int main() {
cin.tie(0)->sync_with_stdio(0);
int a, b, c, d, e; ll n;
cin >> a >> b >> c >> d >> e >> n;
Matrix<mint> M({
{0, 1, 0, 0},
{d, c, e, 0},
{0, 0, 1, 0},
{1, 0, 0, 1}
});
Matrix<mint> x({{a}, {b}, {1}, {0}});
auto res = M.pow(n+1) * x;
cout << res[3][0].val() << '\n';
return 0;
}
Yudai0606Nazo