結果
| 問題 | No.2829 GCD Divination |
| コンテスト | |
| ユーザー |
|
| 提出日時 | 2024-08-02 22:59:38 |
| 言語 | C++14 (gcc 13.3.0 + boost 1.89.0) |
| 結果 |
WA
|
| 実行時間 | - |
| コード長 | 3,395 bytes |
| 記録 | |
| コンパイル時間 | 16,077 ms |
| コンパイル使用メモリ | 175,868 KB |
| 実行使用メモリ | 159,616 KB |
| 最終ジャッジ日時 | 2024-08-02 23:00:00 |
| 合計ジャッジ時間 | 19,905 ms |
|
ジャッジサーバーID (参考情報) |
judge1 / judge3 |
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| ファイルパターン | 結果 |
|---|---|
| other | AC * 3 WA * 1 RE * 1 TLE * 1 -- * 29 |
ソースコード
#include <bits/stdc++.h>
using namespace std;
void _main();
int main() {
_main();
return 0;
}
using ll = long long;
using ull = unsigned long long;
using ld = long double;
using vi = std::vector<int>;
using vvi = std::vector<vi>;
using vl = std::vector<ll>;
using vii = std::vector<pair<int, int> >;
using vvl = std::vector<vl>;
using vll = std::vector<pair<ll , ll> >;
using vd = std::vector<double>;
using vvd = std::vector<vd>;
using vs = std::vector<std::string>;
using vvs = std::vector<vs>;
using vb = std::vector<bool>;
using vvb = std::vector<vb>;
using vc = std::vector<char>;
using vvc = std::vector<vc>;
using pii = std::pair<int, int>;
using pll = std::pair<ll, ll>;
using piil = std::pair<pair<int, int>, ll>;
using mii = std::map<int, int>;
using mll = std::map<ll, ll>;
using pql = std::priority_queue<ll>;
using pqi = std::priority_queue<int>;
using pqiil = std::priority_queue<pair<pair<int, int>, ll> >;
using pqii = std::priority_queue<pair<int, int> >;
#define pb push_back
#define ps push
#define eb emplace_back
#define is insert
#define er erase
#define f first
#define s second
#define lb lower_bound
#define ub upper_bound
#define sf(i) sizeof(i)
#define endl "\n"
#define sz(v) ((int)(v).size())
#define all(v) (v).begin(), (v).end()
#define rep(i, L, R) for(ll i = L;i<=R;i++)
#define pcis precision
template<typename T>
struct infinity {
static constexpr T max=std::numeric_limits<T>::max();
static constexpr T min=std::numeric_limits<T>::min();
static constexpr T value=std::numeric_limits<T>::max()/2;
static constexpr T mvalue=std::numeric_limits<T>::min()/2;
};
template<typename T>constexpr T INF=infinity<T>::value;
constexpr ll lINF=INF<ll>;
constexpr int iINF = INF<int>;
constexpr ld PI = 3.1415926535897932384626;
double is[10000001];
ll phi(ll N) {
if (is[N] != 0)return is[N];
ll res = N;
for (long i = 2; i <= sqrt(N); i++) {
if (N % i == 0) {
res = res - res / i;
while (N % i == 0) N /= i;
}
}
if (N > 1) res = res - res / N;
return is[N] = res;
}
ll gcd(ll a, ll b) {
if (b==0)return a;
else return gcd(b, a%b);
}
struct ra {
ll up = 1;
ll down = 1;
};
ra radd(ra a, ra b) {
ra c;
c.up = a.up*b.down+b.up*a.down;
c.down = a.down*b.down;
return c;
}
ra remp(ra a, ll em) {
ra c;
c.up = a.up*em;
c.down = a.down;
return c;
}
ra rdemp(ra a, ll em) {
ra c;
c.up = a.up;
c.down = a.down*em;
return c;
}
ra rmul(ra a, ra b) {
ra c;
c.up = a.up*b.up;
c.down = a.down*b.down;
return c;
}
ra rdiv(ra a, ra b) {
ra c;
c.up = a.up*b.down;
c.down = a.down*b.up;
return c;
}
ra rsub(ra a, ra b) {
return radd(a, remp(b, -1));
}
bool rsame(ra a, ra b) {
return (a.up*b.down==a.down*b.up);
}
ra mr(ll a, ll b) {
ra c;
c.up = a;
c.down = b;
return c;
}
ra DP[10000001];
// N일때 기댓값 반환
ra rei = {0,1};
ra GET(ll N) {
if (N==1)return {0, 1};
if (!rsame(DP[N], rei))return DP[N];
ra kitai = rei;
for (ll i = 1; i*i<=N; i++) {
// i가 되는 경우
if (N%i == 0) {
kitai = radd(kitai, remp(GET(i) , phi(N/i)));
if (i != 1 && i*i != N) {
kitai = radd(kitai, remp(GET(N/i) , phi(i)));
}
}
}
kitai = radd(kitai, mr(N, 1));
kitai = rmul(kitai, mr(1, N-1));
return DP[N] = kitai;
}
void _main() {
ll N;
cin >> N;
for (ll i = 1; i<=N; i++)DP[i]=rei;
cout.pcis(10);
cout << GET(N).up/GET(N).down;
// cout << GET(N).up << "/" << GET(N).down << endl;
}