結果

問題 No.2380 Sylow P-subgroup
ユーザー Shell-Wataru
提出日時 2023-07-14 21:37:02
言語 C++14
(gcc 13.3.0 + boost 1.87.0)
結果
AC  
実行時間 2 ms / 2,000 ms
コード長 3,588 bytes
コンパイル時間 1,843 ms
コンパイル使用メモリ 133,340 KB
実行使用メモリ 5,376 KB
最終ジャッジ日時 2024-09-16 06:29:11
合計ジャッジ時間 2,869 ms
ジャッジサーバーID
(参考情報)
judge1 / judge3
このコードへのチャレンジ
(要ログイン)
ファイルパターン 結果
sample AC * 3
other AC * 14
権限があれば一括ダウンロードができます

ソースコード

diff #
プレゼンテーションモードにする

#include <iostream>
#include <algorithm>
#include <vector>
#include <deque>
#include <queue>
#include <set>
#include <map>
#include <limits>
#include <cmath>
#include <iomanip>
#include <functional>
#include <random>
#include <set>
#include <atcoder/string>
#include <atcoder/math>
#include <unordered_map>
#include <climits>
using namespace std;
using ll = long long;
using namespace atcoder;
const long long BASE_NUM = 998244353;
// https://scrapbox.io/pocala-kyopro/%E6%8B%A1%E5%BC%B5%E3%83%A6%E3%83%BC%E3%82%AF%E3%83%AA%E3%83%83%E3%83%89%E3%81%AE%E4%BA%92%E9%99%A4%E6%B3%95
// https://ei1333.github.io/luzhiled/snippets/math/combination.html
template <int mod>
struct ModInt
{
int x;
ModInt() : x(0) {}
ModInt(int64_t y) : x(y >= 0 ? y % mod : (mod - (-y) % mod) % mod) {}
ModInt &operator+=(const ModInt &p)
{
if ((x += p.x) >= mod)
x -= mod;
return *this;
}
ModInt &operator-=(const ModInt &p)
{
if ((x += mod - p.x) >= mod)
x -= mod;
return *this;
}
ModInt &operator*=(const ModInt &p)
{
x = (int)(1LL * x * p.x % mod);
return *this;
}
ModInt &operator/=(const ModInt &p)
{
*this *= p.inverse();
return *this;
}
ModInt operator-() const { return ModInt(-x); }
ModInt operator+(const ModInt &p) const { return ModInt(*this) += p; }
ModInt operator-(const ModInt &p) const { return ModInt(*this) -= p; }
ModInt operator*(const ModInt &p) const { return ModInt(*this) *= p; }
ModInt operator/(const ModInt &p) const { return ModInt(*this) /= p; }
bool operator==(const ModInt &p) const { return x == p.x; }
bool operator!=(const ModInt &p) const { return x != p.x; }
ModInt inverse() const
{
int a = x, b = mod, u = 1, v = 0, t;
while (b > 0)
{
t = a / b;
swap(a -= t * b, b);
swap(u -= t * v, v);
}
return ModInt(u);
}
ModInt pow(int64_t n) const
{
ModInt ret(1), mul(x);
while (n > 0)
{
if (n & 1)
ret *= mul;
mul *= mul;
n >>= 1;
}
return ret;
}
friend ostream &operator<<(ostream &os, const ModInt &p)
{
return os << p.x;
}
friend istream &operator>>(istream &is, ModInt &a)
{
int64_t t;
is >> t;
a = ModInt<mod>(t);
return (is);
}
static int get_mod() { return mod; }
};
using modint = ModInt<BASE_NUM>;
template <typename T>
struct Combination
{
vector<T> _fact, _rfact, _inv;
Combination(int sz) : _fact(sz + 1), _rfact(sz + 1), _inv(sz + 1)
{
_fact[0] = _rfact[sz] = _inv[0] = 1;
for (int i = 1; i <= sz; i++)
_fact[i] = _fact[i - 1] * i;
_rfact[sz] /= _fact[sz];
for (int i = sz - 1; i >= 0; i--)
_rfact[i] = _rfact[i + 1] * (i + 1);
for (int i = 1; i <= sz; i++)
_inv[i] = _rfact[i] * _fact[i - 1];
}
inline T fact(int k) const { return _fact[k]; }
inline T rfact(int k) const { return _rfact[k]; }
inline T inv(int k) const { return _inv[k]; }
T P(int n, int r) const
{
if (r < 0 || n < r)
return 0;
return fact(n) * rfact(n - r);
}
T C(int p, int q) const
{
if (q < 0 || p < q)
return 0;
return fact(p) * rfact(q) * rfact(p - q);
}
T H(int n, int r) const
{
if (n < 0 || r < 0)
return (0);
return r == 0 ? 1 : C(n + r - 1, r);
}
};
using modint = ModInt<BASE_NUM>;
int solve()
{
ll N,P;
cin >> N >> P;
ll e = 0;
while(N > 0){
N/= P;
e += N;
}
modint ans = P;
cout << ans.pow(e) << endl;
return 0;
}
int main()
{
// ll T;
// cin >> T;
// while(T--){
solve();
// }
return 0;
}
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