#951693 (C++14) No.2631 Rectangle Grid Game

• 問題: No.2631 Rectangle Grid Game
• ユーザー: PersistentLife
• 提出日時: 2024-02-16 23:28:18
• 言語: C++14 (gcc 12.3.0 + boost 1.83.0)
• 結果: WA
• 実行時間: -
• コード長: 1,247 bytes
• コンパイル時間: 2,038 ms
• コンパイル使用メモリ: 167,140 KB
• 実行使用メモリ: 6,676 KB
• 最終ジャッジ日時: 2024-02-16 23:28:26
• 合計ジャッジ時間: 3,205 ms
• ジャッジサーバーID （参考情報）: judge15 / judge12

入力	結果	実行時間; 実行使用メモリ
testcase_00	WA	-
testcase_01	WA	-
testcase_02	WA	-
testcase_03	WA	-
testcase_04	WA	-
testcase_05	WA	-
testcase_06	WA	-
testcase_07	AC	1 ms; 6,676 KB
testcase_08	AC	2 ms; 6,676 KB
testcase_09	AC	2 ms; 6,676 KB
testcase_10	WA	-
testcase_11	WA	-
testcase_12	WA	-
testcase_13	WA	-
testcase_14	WA	-
testcase_15	WA	-
testcase_16	WA	-
testcase_17	WA	-
testcase_18	WA	-
testcase_19	WA	-
testcase_20	WA	-
testcase_21	WA	-
testcase_22	WA	-
testcase_23	WA	-
testcase_24	WA	-
testcase_25	WA	-
testcase_26	WA	-
testcase_27	WA	-
testcase_28	WA	-
testcase_29	WA	-
testcase_30	AC	2 ms; 6,676 KB
testcase_31	AC	2 ms; 6,676 KB
testcase_32	WA	-

ソースコード

/*
Things to notice:
1. do not calculate useless values
2. do not use similar names
 
Things to check:
1. submit the correct file
2. time (it is log^2 or log)
3. memory
4. prove your naive thoughts 
5. long long
6. corner case like n=0,1,inf or n=m
7. check if there is a mistake in the ds or other tools you use
8. fileio in some oi-contest

9. module on time 
10. the number of a same divisor in a math problem
11. multi-information and queries for dp and ds problems
*/
#include<bits/stdc++.h>
using namespace std;
#define int long long
#define fi first
#define se second
#define pii pair<long long,long long>
#define mp make_pair
#define pb push_back
const int mod=998244353;
const int inf=0x3f3f3f3f;
const int INF=1e18;
void solve()
{
	int n,m;
	cin>>n>>m; 
	int ans=n*m%mod*((n*m-1)%mod)%mod;
	if(m%2==0) ans=(ans-n*(2*m-2)%mod+mod)%mod;
	else ans=(ans-n*(m-1)%mod+mod)%mod;
	swap(n,m);
	if(m%2==0) ans=(ans-n*(2*m-2)%mod+mod)%mod;
	else ans=(ans-n*(m-1)%mod+mod)%mod;
	int lim1=(n+1)/2,lim2=(m+1)/2;
	n-=lim1-1,m-=lim2-1;
	n--,m--;
	n=n*(n+1)/2,n%=mod;
	m=m*(m+1)/2,m%=mod;
	ans=(ans-4LL*n*m%mod+mod)%mod;
	cout<<ans<<"\n";
}
signed main()
{
//	ios::sync_with_stdio(0);
//	cin.tie(0);
	int _=1;
//	cin>>_;
	while(_--) solve();
	return 0;
}