結果
| 問題 |
No.3187 Mingle
|
| コンテスト | |
| ユーザー |
|
| 提出日時 | 2025-06-25 23:24:33 |
| 言語 | C++23 (gcc 13.3.0 + boost 1.87.0) |
| 結果 |
AC
|
| 実行時間 | 763 ms / 2,500 ms |
| コード長 | 3,954 bytes |
| コンパイル時間 | 3,385 ms |
| コンパイル使用メモリ | 284,380 KB |
| 実行使用メモリ | 38,252 KB |
| 最終ジャッジ日時 | 2025-06-25 23:24:54 |
| 合計ジャッジ時間 | 20,534 ms |
|
ジャッジサーバーID (参考情報) |
judge1 / judge4 |
(要ログイン)
| ファイルパターン | 結果 |
|---|---|
| sample | AC * 3 |
| other | AC * 30 |
ソースコード
# include <bits/stdc++.h>
using namespace std;
using ll = long long;
using ull = unsigned long long;
const double pi = acos(-1);
template<class T>constexpr T inf() { return ::std::numeric_limits<T>::max(); }
template<class T>constexpr T hinf() { return inf<T>() / 2; }
template <typename T_char>T_char TL(T_char cX) { return tolower(cX); }
template <typename T_char>T_char TU(T_char cX) { return toupper(cX); }
template<class T> bool chmin(T& a,T b) { if(a > b){a = b; return true;} return false; }
template<class T> bool chmax(T& a,T b) { if(a < b){a = b; return true;} return false; }
int popcnt(unsigned long long n) { int cnt = 0; for (int i = 0; i < 64; i++)if ((n >> i) & 1)cnt++; return cnt; }
int d_sum(ll n) { int ret = 0; while (n > 0) { ret += n % 10; n /= 10; }return ret; }
int d_cnt(ll n) { int ret = 0; while (n > 0) { ret++; n /= 10; }return ret; }
ll gcd(ll a, ll b) { if (b == 0)return a; return gcd(b, a%b); };
ll lcm(ll a, ll b) { ll g = gcd(a, b); return a / g*b; };
ll MOD(ll x, ll m){return (x%m+m)%m; }
ll FLOOR(ll x, ll m) {ll r = (x%m+m)%m; return (x-r)/m; }
template<class T> using dijk = priority_queue<T, vector<T>, greater<T>>;
# define all(qpqpq) (qpqpq).begin(),(qpqpq).end()
# define UNIQUE(wpwpw) (wpwpw).erase(unique(all((wpwpw))),(wpwpw).end())
# define LOWER(epepe) transform(all((epepe)),(epepe).begin(),TL<char>)
# define UPPER(rprpr) transform(all((rprpr)),(rprpr).begin(),TU<char>)
# define rep(i,upupu) for(ll i = 0, i##_len = (upupu);(i) < (i##_len);(i)++)
# define reps(i,opopo) for(ll i = 1, i##_len = (opopo);(i) <= (i##_len);(i)++)
# define len(x) ((ll)(x).size())
# define bit(n) (1LL << (n))
# define pb push_back
# define eb emplace_back
# define exists(c, e) ((c).find(e) != (c).end())
struct INIT{
INIT(){
std::ios::sync_with_stdio(false);
std::cin.tie(0);
cout << fixed << setprecision(20);
}
}INIT;
namespace mmrz {
void solve();
}
int main(){
mmrz::solve();
}
#define debug(...) (static_cast<void>(0))
using namespace mmrz;
class dynamic_modint {
using u64 = std::uint_fast64_t;
static u64 Modulus;
public:
u64 a;
static void set_mod(u64 m) { Modulus = m; }
u64 &value() { return a; }
dynamic_modint(u64 x = 0) : a(x % Modulus) {}
dynamic_modint operator+(const dynamic_modint rhs) const {
return dynamic_modint(*this) += rhs;
}
dynamic_modint operator-(const dynamic_modint rhs) const {
return dynamic_modint(*this) -= rhs;
}
dynamic_modint operator*(const dynamic_modint rhs) const {
return dynamic_modint(*this) *= rhs;
}
dynamic_modint operator/(const dynamic_modint rhs) const {
return dynamic_modint(*this) /= rhs;
}
dynamic_modint &operator+=(const dynamic_modint rhs) {
a += rhs.a;
if (a >= Modulus) {
a -= Modulus;
}
return *this;
}
dynamic_modint &operator-=(const dynamic_modint rhs) {
if (a < rhs.a) {
a += Modulus;
}
a -= rhs.a;
return *this;
}
dynamic_modint &operator*=(const dynamic_modint rhs) {
a = a * rhs.a % Modulus;
return *this;
}
dynamic_modint &operator/=(dynamic_modint rhs) {
u64 exp = Modulus - 2;
while (exp) {
if (exp % 2) {
*this *= rhs;
}
rhs *= rhs;
exp /= 2;
}
return *this;
}
friend std::ostream& operator<<(std::ostream& os, const dynamic_modint& rhs) {
os << rhs.a;
return os;
}
};
inline dynamic_modint::u64 dynamic_modint::Modulus = 1;
void SOLVE(){
int n, p;
cin >> n >> p;
dynamic_modint::set_mod(p);
vector d(n+1, vector<int>());
reps(i, n){
for(int j = i;j <= n;j += i){
d[j].eb(i);
}
}
vector<dynamic_modint> f(n+1, dynamic_modint(0));
dynamic_modint tot = 0;
for(int i = 3;i <= n;i++){
dynamic_modint sum = tot;
for(auto j : d[i])sum -= f[j];
f[i] = (sum/i + 1)*i/(i-len(d[i]));
tot = sum + f[i]*len(d[i]);
for(auto j : d[i])f[j] = f[i];
}
cout << f[n] << '\n';
}
void mmrz::solve(){
int t = 1;
//cin >> t;
while(t--)SOLVE();
}