結果
| 問題 |
No.3004 ヤング図形
|
| コンテスト | |
| ユーザー |
Today03
|
| 提出日時 | 2025-01-17 22:27:08 |
| 言語 | C++23 (gcc 13.3.0 + boost 1.87.0) |
| 結果 |
MLE
|
| 実行時間 | - |
| コード長 | 3,310 bytes |
| コンパイル時間 | 3,467 ms |
| コンパイル使用メモリ | 277,680 KB |
| 実行使用メモリ | 817,920 KB |
| 最終ジャッジ日時 | 2025-01-17 22:28:08 |
| 合計ジャッジ時間 | 28,942 ms |
|
ジャッジサーバーID (参考情報) |
judge3 / judge2 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 3 |
| other | AC * 6 MLE * 19 |
ソースコード
#include <bits/stdc++.h>
using namespace std;
using ll = long long;
const int INF = 1e9 + 10;
const ll INFL = 4e18;
template <ll MOD>
struct ModInt {
ll value;
ModInt(ll x = 0) { value = (x >= 0 ? x % MOD : MOD - (-x) % MOD); }
ModInt operator-() const { return ModInt(-value); }
ModInt operator+() const { return ModInt(*this); }
ModInt& operator+=(const ModInt& other) {
value += other.value;
if (value >= MOD) value -= MOD;
return *this;
}
ModInt& operator-=(const ModInt& other) {
value += MOD - other.value;
if (value >= MOD) value -= MOD;
return *this;
}
ModInt& operator*=(const ModInt other) {
value = value * other.value % MOD;
return *this;
}
ModInt& operator/=(ModInt other) {
(*this) *= other.inv();
return *this;
}
ModInt operator+(const ModInt& other) const { return ModInt(*this) += other; }
ModInt operator-(const ModInt& other) const { return ModInt(*this) -= other; }
ModInt operator*(const ModInt& other) const { return ModInt(*this) *= other; }
ModInt operator/(const ModInt& other) const { return ModInt(*this) /= other; }
ModInt pow(ll x) const {
ModInt ret(1), mul(value);
while (x) {
if (x & 1) ret *= mul;
mul *= mul;
x >>= 1;
}
return ret;
}
ModInt inv() const { return pow(MOD - 2); }
bool operator==(const ModInt& other) const { return value == other.value; }
bool operator!=(const ModInt& other) const { return value != other.value; }
friend ostream& operator<<(ostream& os, const ModInt& x) { return os << x.value; }
friend istream& operator>>(istream& is, ModInt& x) {
ll v;
is >> v;
x = ModInt<MOD>(v);
return is;
}
static constexpr ll get_mod() { return MOD; }
};
using Mod998 = ModInt<998244353>;
using Mod107 = ModInt<1000000007>;
template <typename T>
struct Combinatorics {
Combinatorics(int n) {
fac = vector<T>(n + 1);
finv = vector<T>(n + 1);
fac[0] = 1;
for (int i = 1; i <= n; i++) fac[i] = fac[i - 1] * i;
finv[n] = fac[n].inv();
for (int i = n; i >= 1; i--) finv[i - 1] = finv[i] * i;
}
T comb(ll n, ll r) {
if (n < 0 || r < 0 || n - r < 0) return 0;
return fac[n] * finv[r] * finv[n - r];
}
T perm(ll n, ll r) {
if (n < 0 || r < 0 || n - r < 0) return 0;
return fac[n] * finv[n - r];
}
T fact(int n) { return fac[n]; }
T factinv(int n) { return finv[n]; }
T operator()(ll n, ll r) { return comb(n, r); }
private:
vector<T> fac, finv;
};
using mint = Mod998;
int main() {
int K;
cin >> K;
vector<int> L(K), M(K);
int N = 0;
for (int i = 0; i < K; i++) {
cin >> L[i] >> M[i];
N += L[i] * M[i];
}
Combinatorics<mint> C(N + 10);
mint ans = C.fact(N);
for (int i = 0; i < K; i++) ans *= C.factinv(L[i] * M[i]);
for (int i = 0; i < K; i++) {
int base = L[i];
mint res = 1;
for (int t = 0; t < M[i] - 1; t++) {
int add = L[i] - 1;
base += add;
res *= C(base, add);
base++;
}
ans *= res;
}
cout << ans << endl;
}
Today03