結果
| 問題 |
No.526 フィボナッチ数列の第N項をMで割った余りを求める
|
| コンテスト | |
| ユーザー |
|
| 提出日時 | 2024-06-18 02:31:29 |
| 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 | 4,828 bytes |
| コンパイル時間 | 5,423 ms |
| コンパイル使用メモリ | 275,072 KB |
| 実行使用メモリ | 6,948 KB |
| 最終ジャッジ日時 | 2024-06-18 02:31:36 |
| 合計ジャッジ時間 | 6,856 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 * 12 |
ソースコード
#include<bits/stdc++.h>
#include<ext/pb_ds/assoc_container.hpp>
#include<ext/pb_ds/tree_policy.hpp>
#include<ext/pb_ds/tag_and_trait.hpp>
using namespace __gnu_pbds;
template<class T> using Tree=tree<T,null_type,std::less<T>,rb_tree_tag,tree_order_statistics_node_update>;
template<class T>
struct matrix{
public:
using value_type = T;
private:
std::vector<std::vector<value_type>> mat;
int row, col;
public:
matrix() = default;
matrix(int n) : matrix(n, n) {}
matrix(int m, int n) : mat(m, std::vector<value_type>(n)), row(m), col(n) {}
constexpr matrix operator+(const matrix rhs) const {
return matrix(*this) += rhs;
}
constexpr matrix operator-(const matrix rhs) const {
return matrix(*this) -= rhs;
}
constexpr matrix operator*(const matrix rhs) const {
return matrix(*this) *= rhs;
}
constexpr matrix &operator+=(const matrix rhs) {
static_assert(!mat.empty() && mat.row == rhs.row && mat.col == rhs.col);
for (int i = 0; i < row; ++i) {
for (int j = 0; j < col; ++j) {
mat[i][j] += rhs.mat[i][j];
}
}
}
constexpr matrix &operator-=(const matrix rhs) {
static_assert(!mat.empty() && row == rhs.row && col == rhs.col);
for (int i = 0; i < row; ++i) {
for (int j = 0; j < col; ++j) {
mat[i][j] -= rhs.mat[i][j];
}
}
}
constexpr matrix operator*(const value_type a) const noexcept {
return matrix(*this) *= a;
}
constexpr matrix operator*=(const value_type a) noexcept {
for (int i = 0; i < row; ++i) {
for (int j = 0; j < col; ++j) {
mat[i][j] *= a;
}
}
return *this;
}
constexpr bool operator==(const matrix rhs) const noexcept {
if (row != rhs.row || col != rhs.col) return false;
for (int i = 0; i < row; ++i) {
for (int j = 0; j < col; ++j) {
if (mat[i][j] != rhs.mat[i][j]) return false;
}
}
return true;
}
constexpr bool operator!=(const matrix rhs) const noexcept {
return !(matrix(*this) == rhs);
}
constexpr std::vector<value_type> &operator[](int pos) { return mat[pos]; }
constexpr matrix mul(const matrix lhs, const matrix rhs) const {
assert(lhs.col == rhs.row);
matrix<value_type> res(lhs.row, rhs.col);
for (int i = 0; i < lhs.row; ++i) {
for (int k = 0; k < rhs.col; ++k) {
for (int j = 0; j < lhs.col; ++j) {
res.mat[i][j] += lhs.mat[i][k] * rhs.mat[k][j];
}
}
}
return res;
}
constexpr matrix pow(matrix x, long long n) {
int len = x.row;
matrix<value_type> res(len, len), a = x;
for (int i = 0; i < len; ++i) {
res[i][i] = 1;
}
while (n) {
if (n & 1) res = mul(res, a);
a = mul(a, a);
n >>= 1;
}
return res;
}
constexpr int height() const { return row; }
constexpr int width() const { return col; }
friend std::ostream &operator<<(std::ostream &os, matrix &x) {
for (int i = 0; i < x.row; ++i) {
for (int j = 0; j < x.col; ++j) {
os << x.mat[i][j] << (j + 1 == x.col ? "\n" : " ");
}
}
return os;
}
};
struct arbmodint{
private:
long long x;
static long long &mod() {
static long long mod_ = 0;
return mod_;
}
public:
arbmodint(const long long v = 0) {
x = v;
if (x >= get_mod()) x += get_mod();
if (x < 0) x = x % get_mod() + get_mod();
}
static void set_mod(const long long m) { mod() = m; }
static long long get_mod() { return mod(); }
long long &val() noexcept { return x; }
friend std::ostream &operator<<(std::ostream& os, arbmodint& b) {
return os << b.x;
}
friend std::istream &operator>>(std::istream& is, arbmodint& b) {
return is >> b.x;
}
arbmodint operator+(const arbmodint rhs) const {
return arbmodint(*this) += rhs;
}
arbmodint operator-(const arbmodint rhs) const {
return arbmodint(*this) -= rhs;
}
arbmodint operator*(const arbmodint rhs) const {
return arbmodint(*this) *= rhs;
}
arbmodint operator/(const arbmodint rhs) const {
return arbmodint(*this) /= rhs;
}
arbmodint &operator+=(const arbmodint rhs) {
x += rhs.x;
if(x >= get_mod()) x -= get_mod();
return *this;
}
arbmodint &operator-=(const arbmodint rhs) {
if (x < rhs.x) x += get_mod();
x -= rhs.x;
return *this;
}
arbmodint &operator*=(const arbmodint rhs) {
x = x * rhs.x % get_mod();
return *this;
}
arbmodint &operator/=(const arbmodint rhs) {
return *this = *this * rhs.inv();
}
arbmodint inv() const {
long long a = x, b = get_mod(), u = 1, v = 0, t;
while (b) {
t = a / b;
a -= t * b;
u -= t * v;
std::swap(a, b);
std::swap(u, v);
}
u %= get_mod();
if (u < 0) u += get_mod();
return u;
}
arbmodint pow(long long n) const {
arbmodint a = *this, res = 1;
while (n) {
if (n & 1) res *= a;
a *= a;
n >>= 1;
}
return res;
}
};
using mint=arbmodint;
int main() {
long long n,m;
std::cin >>n >>m;
mint::set_mod(m);
matrix<mint> f(2,2);
f[0][0]=f[0][1]=f[1][0]=mint(1);
f=f.pow(f,n-2);
std::cout <<f[0][0] <<"\n";
}