結果
| 問題 |
No.1396 Giri
|
| コンテスト | |
| ユーザー |
commy
|
| 提出日時 | 2021-02-14 21:55:24 |
| 言語 | C++17 (gcc 13.3.0 + boost 1.87.0) |
| 結果 |
TLE
|
| 実行時間 | - |
| コード長 | 4,651 bytes |
| コンパイル時間 | 970 ms |
| コンパイル使用メモリ | 91,548 KB |
| 最終ジャッジ日時 | 2025-01-18 20:56:58 |
|
ジャッジサーバーID (参考情報) |
judge2 / judge2 |
(要ログイン)
| ファイルパターン | 結果 |
|---|---|
| sample | AC * 2 TLE * 1 |
| other | AC * 17 TLE * 5 MLE * 1 |
ソースコード
#include <iostream>
#include <vector>
#include <algorithm>
#include <string>
#include <numeric>
#include <utility>
#include <tuple>
#define rep(i, a, b) for (int i = int(a); i < int(b); i++)
using namespace std;
using ll = long long int;
using P = pair<ll, ll>;
// clang-format off
#ifdef _DEBUG_
#define dump(...) do{ cerr << __LINE__ << ":\t" << #__VA_ARGS__ << " = "; PPPPP(__VA_ARGS__); cerr << endl; } while(false)
template<typename T> void PPPPP(T t) { cerr << t; }
template<typename T, typename... S> void PPPPP(T t, S... s) { cerr << t << ", "; PPPPP(s...); }
#else
#define dump(...) do{ } while(false)
#endif
template<typename T> vector<T> make_v(size_t a, T b) { return vector<T>(a, b); }
template<typename... Ts> auto make_v(size_t a, Ts... ts) { return vector<decltype(make_v(ts...))>(a, make_v(ts...)); }
template<typename T> bool chmin(T &a, T b) { if (a > b) {a = b; return true; } return false; }
template<typename T> bool chmax(T &a, T b) { if (a < b) {a = b; return true; } return false; }
template<typename T> void print(T a) { cout << a << '\n'; }
template<typename T, typename... Ts> void print(T a, Ts... ts) { cout << a << ' '; print(ts...); }
template<typename T> istream &operator,(istream &in, T &t) { return in >> t; }
// clang-format on
template<ll MOD = 1000000007>
class ModInt {
ll n;
ModInt constexpr inverse() const {
return ModInt::pow(*this, MOD - 2);
}
public:
ModInt() : n(0) {}
ModInt(ll _n) : n(((_n % MOD) + MOD) % MOD) {}
ModInt operator+=(const ModInt &m) {
n += m.n;
if (n >= MOD) n -= MOD;
return *this;
}
ModInt operator-=(const ModInt &m) {
n -= m.n;
if (n < 0) n += MOD;
return *this;
}
ModInt operator*=(const ModInt &m) {
n *= m.n;
if (n >= MOD) n %= MOD;
return *this;
}
ModInt operator/=(const ModInt &m) {
(*this) *= m.inverse();
return *this;
}
friend ModInt operator+(ModInt t, const ModInt &m) {
return t += m;
}
friend ModInt operator-(ModInt t, const ModInt &m) {
return t -= m;
}
friend ModInt operator*(ModInt t, const ModInt &m) {
return t *= m;
}
friend ModInt operator/(ModInt t, const ModInt &m) {
return t /= m;
}
ModInt operator=(const ll l) {
n = l % MOD;
if (n < 0) n += MOD;
return *this;
}
friend ostream &operator<<(ostream &out, const ModInt &m) {
out << m.n;
return out;
}
friend istream &operator>>(istream &in, ModInt &m) {
ll l;
in >> l;
m = l;
return in;
}
static constexpr ModInt pow(const ModInt x, ll p) {
ModInt<MOD> ans = 1;
for (ModInt<MOD> m = x; p > 0; p /= 2, m *= m) {
if (p % 2) ans *= m;
}
return ans;
}
};
using mint = ModInt<998244353>;
mint operator"" _m(unsigned long long m) {
return mint(m);
}
class Eratosthenes {
vector<int> plist;
public:
Eratosthenes(int sz) : plist(sz, -1) {
for (int i = 2; i < sz; i++) {
if (plist[i] == -1) {
for (int j = i; j < sz; j += i) {
if (plist[j] == -1) {
plist[j] = i;
}
}
}
}
}
bool isPrime(int n) {
return plist[n] == n;
}
vector<int> factor(int n) {
vector<int> res;
while (n > 1) {
res.push_back(plist[n]);
n /= plist[n];
}
return res;
}
};
#include <map>
int main() {
cin.tie(nullptr);
ios::sync_with_stdio(false);
int n;
cin, n;
Eratosthenes era(n + 1);
vector<map<int, int>> lst(n);
map<int, int> mx1, mx2;
mint ans = 1;
vector<map<int, int>> v1(n), v2(n);
rep(i, 1, n + 1) {
auto res = era.factor(i);
for (auto e : res) {
lst[i - 1][e]++;
}
for (auto [e, c] : lst[i - 1]) {
v1[i - 1][e] = mx1[e];
mx1[e] = max(mx1[e], c);
}
}
for (auto [n, c] : mx1) {
rep(i, 0, c) {
ans *= n;
}
}
for (int i = n; i >= 1; i--) {
for (auto [e, c] : lst[i - 1]) {
v2[i - 1][e] = mx2[e];
mx2[e] = max(mx2[e], c);
}
}
ll m = 1;
rep(i, 1, n + 1) {
ll t = 1;
for (auto [e, c] : lst[i - 1]) {
ll cc = max(v1[i - 1][e], v2[i - 1][e]);
rep(j, cc, c) {
t *= e;
}
}
// dump(i, t);
chmax(m, t);
}
print(ans / m);
return 0;
}
commy