#1035713 (C++17) No.3004 ヤング図形

• 問題: No.3004 ヤング図形
• ユーザー: shobonvip
• 提出日時: 2025-01-17 21:33:03
• 言語: C++17 (gcc 13.3.0 + boost 1.87.0)
• 結果: MLE
• 実行時間: -
• コード長: 1,981 bytes
• コンパイル時間: 3,750 ms
• コンパイル使用メモリ: 250,720 KB
• 実行使用メモリ: 785,024 KB
• 最終ジャッジ日時: 2025-01-17 21:34:00
• 合計ジャッジ時間: 49,200 ms
• ジャッジサーバーID （参考情報）: judge4 / judge5

ファイルパターン	結果
sample	MLE * 3
other	MLE * 25

ソースコード

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/**
    author:  shobonvip
    created: 2025.01.17 21:20:38
**/
#include<bits/stdc++.h>
using namespace std;
//* ATCODER
#include<atcoder/all>
using namespace atcoder;
typedef modint998244353 mint;
//*/
/* BOOST MULTIPRECISION
#include<boost/multiprecision/cpp_int.hpp>
using namespace boost::multiprecision;
//*/
typedef long long ll;
#define rep(i, s, n) for (int i = (int)(s); i < (int)(n); i++)
#define rrep(i, s, n) for (int i = (int)(n)-1; i >= (int)(s); i--)
#define all(v) v.begin(), v.end()
template <typename T> bool chmin(T &a, const T &b) {
    if (a <= b) return false;
    a = b;
    return true;
}
template <typename T> bool chmax(T &a, const T &b) {
    if (a >= b) return false;
    a = b;
    return true;
}
template <typename T> T max(vector<T> &a){
    assert(!a.empty());
    T ret = a[0];
    for (int i=0; i<(int)a.size(); i++) chmax(ret, a[i]);
    return ret;
}
template <typename T> T min(vector<T> &a){
    assert(!a.empty());
    T ret = a[0];
    for (int i=0; i<(int)a.size(); i++) chmin(ret, a[i]);
    return ret;
}
template <typename T> T sum(vector<T> &a){
    T ret = 0;
    for (int i=0; i<(int)a.size(); i++) ret += a[i];
    return ret;
}
//defmodfact
const int COMinitMAX = 1e8 + 50;
mint fact[COMinitMAX+1], factinv[COMinitMAX+1];
void modfact(){
    fact[0] = 1;
    for (int i=1; i<=COMinitMAX; i++){
        fact[i] = fact[i-1] * i;
    }
    factinv[COMinitMAX] = fact[COMinitMAX].inv();
    for (int i=COMinitMAX-1; i>=0; i--){
        factinv[i] = factinv[i+1] * (i+1);
    }
}
mint cmb(int a, int b){
    if (a<b || b<0) return mint(0);
    return fact[a]*factinv[b]*factinv[a-b];
}
//--------
int main(){
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    modfact();
    
    int k; cin >> k;
    vector<ll> l(k), m(k);
    rep(i,0,k) cin >> l[i] >> m[i];
    int cnt = 0;
    rep(i,0,k) cnt += l[i] * m[i];
    mint ans = fact[cnt];
    rep(i,0,k) {
        ans *= factinv[l[i] * m[i]];
        rep(j,0,m[i]) {
            ans *= fact[(j + 1) * l[i] - 1];
            ans *= factinv[j * l[i]];
            ans *= factinv[l[i] - 1];
        }
    }
    cout << ans.val() << endl;
}
 
 
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