結果
| 問題 |
No.2156 ぞい文字列
|
| コンテスト | |
| ユーザー |
kotamanegi
|
| 提出日時 | 2022-12-05 22:06:29 |
| 言語 | C++17(clang) (17.0.6 + boost 1.87.0) |
| 結果 |
AC
|
| 実行時間 | 2 ms / 2,000 ms |
| コード長 | 3,999 bytes |
| コンパイル時間 | 4,745 ms |
| コンパイル使用メモリ | 166,376 KB |
| 実行使用メモリ | 5,248 KB |
| 最終ジャッジ日時 | 2024-10-12 18:44:15 |
| 合計ジャッジ時間 | 5,638 ms |
|
ジャッジサーバーID (参考情報) |
judge3 / judge2 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 4 |
| other | AC * 16 |
コンパイルメッセージ
main.cpp:1:17: warning: using directive refers to implicitly-defined namespace 'std'
1 | using namespace std;
| ^
1 warning generated.
ソースコード
using namespace std;
#include "bits/stdc++.h"
#define REP(a, b) for (long long a = 0; a < b; ++a)
#define ALL(a) begin(a), end(a)
#include "atcoder/modint.hpp"
using mint = atcoder::modint998244353;
template <class T>
struct Matrix
{
vector<vector<T>> A;
Matrix() {}
Matrix(size_t n, size_t m) : A(n, vector<T>(m, 0)) {}
Matrix(size_t n) : A(n, vector<T>(n, 0)){};
size_t height() const
{
return (A.size());
}
size_t width() const
{
return (A[0].size());
}
inline const vector<T> &operator[](int k) const
{
return (A.at(k));
}
inline vector<T> &operator[](int k)
{
return (A.at(k));
}
static Matrix I(size_t n)
{
Matrix mat(n);
for (int i = 0; i < n; i++)
mat[i][i] = 1;
return (mat);
}
Matrix &operator+=(const Matrix &B)
{
size_t n = height(), m = width();
assert(n == B.height() && m == B.width());
for (int i = 0; i < n; i++)
for (int j = 0; j < m; j++)
(*this)[i][j] += B[i][j];
return (*this);
}
Matrix &operator-=(const Matrix &B)
{
size_t n = height(), m = width();
assert(n == B.height() && m == B.width());
for (int i = 0; i < n; i++)
for (int j = 0; j < m; j++)
(*this)[i][j] -= B[i][j];
return (*this);
}
Matrix &operator*=(const Matrix &B)
{
size_t n = height(), m = B.width(), p = width();
assert(p == B.height());
vector<vector<T>> C(n, vector<T>(m, 0));
for (int i = 0; i < n; i++)
for (int j = 0; j < m; j++)
for (int k = 0; k < p; k++)
C[i][j] = (C[i][j] + (*this)[i][k] * B[k][j]);
A.swap(C);
return (*this);
}
Matrix &operator^=(long long k)
{
Matrix B = Matrix::I(height());
while (k > 0)
{
if (k & 1)
B *= *this;
*this *= *this;
k >>= 1LL;
}
A.swap(B.A);
return (*this);
}
Matrix operator+(const Matrix &B) const
{
return (Matrix(*this) += B);
}
Matrix operator-(const Matrix &B) const
{
return (Matrix(*this) -= B);
}
Matrix operator*(const Matrix &B) const
{
return (Matrix(*this) *= B);
}
Matrix operator^(const long long k) const
{
return (Matrix(*this) ^= k);
}
friend ostream &operator<<(ostream &os, Matrix &p)
{
size_t n = p.height(), m = p.width();
for (int i = 0; i < n; i++)
{
os << "[";
for (int j = 0; j < m; j++)
{
os << p[i][j] << (j + 1 == m ? "]\n" : ",");
}
}
return (os);
}
T determinant()
{
Matrix B(*this);
assert(width() == height());
T ret = 1;
for (int i = 0; i < width(); i++)
{
int idx = -1;
for (int j = i; j < width(); j++)
{
if (B[j][i] != 0)
idx = j;
}
if (idx == -1)
return (0);
if (i != idx)
{
ret *= -1;
swap(B[i], B[idx]);
}
ret *= B[i][i];
T vv = B[i][i];
for (int j = 0; j < width(); j++)
{
B[i][j] /= vv;
}
for (int j = i + 1; j < width(); j++)
{
T a = B[j][i];
for (int k = 0; k < width(); k++)
{
B[j][k] -= B[i][k] * a;
}
}
}
return (ret);
}
};
Matrix<mint> pows(Matrix<mint> base, long long count)
{
Matrix<mint> now = base;
count--;
while (count != 0)
{
if (count % 2)
{
now *= base;
}
count /= 2;
base *= base;
}
return now;
}
#define ld long double
#define int long long
void solve()
{
int n;
cin >> n;
Matrix<mint> graph(2, 2);
graph.A[0][0] = 1;
graph.A[0][1] = 1;
graph.A[1][0] = 1;
graph = pows(graph, n - 1);
cout << (graph.A[0][0] + graph.A[0][1] - 1).val() << endl;
}
#undef int
int main()
{
// Fasterize input/output script
ios::sync_with_stdio(false);
cin.tie(nullptr);
cout << fixed << setprecision(100);
int t = 1;
// cin >> t; // comment out if solving multi testcase
for (int testCase = 1; testCase <= t; ++testCase)
{
solve();
}
return 0;
}
kotamanegi