#868452 (C++17) No.2299 Antitypoglycemia

• 問題: No.2299 Antitypoglycemia
• ユーザー: snrnsidy
• 提出日時: 2023-05-12 21:32:30
• 言語: C++17 (gcc 13.3.0 + boost 1.87.0)
• 結果: AC
• 実行時間: 3 ms / 2,000 ms
• コード長: 2,597 bytes
• コンパイル時間: 2,555 ms
• コンパイル使用メモリ: 372,392 KB
• 最終ジャッジ日時: 2025-02-12 22:08:43
• ジャッジサーバーID （参考情報）: judge5 / judge5

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

ソースコード

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#pragma GCC optimize("O3")
#pragma GCC optimize(2)
#pragma GCC optimize(3)
#pragma GCC optimize("Ofast")
#pragma GCC optimize("inline")
#pragma GCC optimize("-fgcse")
#pragma GCC optimize("-fgcse-lm")
#pragma GCC optimize("-fipa-sra")
#pragma GCC optimize("-ftree-pre")
#pragma GCC optimize("-ftree-vrp")
#pragma GCC optimize("-fpeephole2")
#pragma GCC optimize("-ffast-math")
#pragma GCC optimize("-fsched-spec")
#pragma GCC optimize("unroll-loops")
#pragma GCC optimize("-falign-jumps")
#pragma GCC optimize("-falign-loops")   
#pragma GCC optimize("-falign-labels")
#pragma GCC optimize("-fdevirtualize")
#pragma GCC optimize("-fcaller-saves")
#pragma GCC optimize("-fcrossjumping") 
#pragma GCC optimize("-fthread-jumps")
#pragma GCC optimize("-funroll-loops")
#pragma GCC optimize("-freorder-blocks")
#pragma GCC optimize("-fschedule-insns")
#pragma GCC optimize("inline-functions")
#pragma GCC optimize("-ftree-tail-merge")
#pragma GCC optimize("-fschedule-insns2")
#pragma GCC optimize("-fstrict-aliasing")
#pragma GCC optimize("-falign-functions")
#pragma GCC optimize("-fcse-follow-jumps")
#pragma GCC optimize("-fsched-interblock")
#pragma GCC optimize("-fpartial-inlining")
#pragma GCC optimize("no-stack-protector")
#pragma GCC optimize("-freorder-functions")
#pragma GCC optimize("-findirect-inlining")
#pragma GCC optimize("-fhoist-adjacent-loads")
#pragma GCC optimize("-frerun-cse-after-loop")
#pragma GCC optimize("inline-small-functions")
#pragma GCC optimize("-finline-small-functions")
#pragma GCC optimize("-ftree-switch-conversion")
#pragma GCC optimize("-foptimize-sibling-calls")
#pragma GCC optimize("-fexpensive-optimizations")
#pragma GCC optimize("inline-functions-called-once")
#pragma GCC optimize("-fdelete-null-pointer-checks")
#pragma GCC optimize("Ofast")
//#pragma GCC target("avx,avx2,fma") 
//#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,tune=native") 
//#pragma GCC optimization ("unroll-loops")
#include <bits/stdc++.h>
using namespace std;
const long long int MOD = 998244353;
int main(void)
{
    cin.tie(0);
    ios::sync_with_stdio(false);
    long long int n,a,b;
    cin >> n >> a >> b;
    if(a!=b)
    {
        long long int res = 0;
        long long int mul = 1;
        for(int i=1;i<=n-2;i++)
        {
            mul*=i;
            mul%=MOD;
        }
        res += mul;
        res%=MOD;
        mul*=(n-1);
        mul%=MOD;
        res += (MOD - ((2*mul)%MOD));
        res%=MOD;
        mul*=n;
        mul%=MOD;
        res += mul;
        res%=MOD;
        cout << res << '\n';
    }
    else
    {
        long long int res = 1;
        for(int i=1;i<n;i++)
        {
            res*=i;
            res%=MOD;
        }
        res*=(n-2);
        res%=MOD;
        cout << res << '\n';
    }
    return 0;
}
 
 
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