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ID题目提交者结果用时内存语言文件大小提交时间测评时间
#140105#5411. 杏仁1kri#0 0ms0kbC++141.6kb2023-08-15 08:44:522024-07-04 01:42:41

Judging History

你现在查看的是最新测评结果

  • [2024-07-04 01:42:41]
  • 评测
  • 测评结果:0
  • 用时:0ms
  • 内存:0kb
  • [2023-08-15 08:44:52]
  • 提交

answer

#include <iostream>
#include <cstdio>
#include <cstring>
#define mod 998244353
#define ll long long
using namespace std;
void inc(int &x,int y){
	x+=y;
	if (x>=mod)x-=mod;
	return;
}
int n,m,s,t,c[22][22];
int pow_2[10005];
int f[4200005][22][2];
int dfs(int S,int p,int o){
	if (f[S][p][o]!=-1)return f[S][p][o];
	ll ans=0;
	if (o==1)ans=c[p][t];
	int _o=1;
	for (int i=0;i<n;i++)
		if (!(S&(1<<i))){
			if (i==s||i==t)continue;
			ans+=1ll*c[p][i]*dfs(S|(1<<i),i,o|(_o));
			if (o==1)ans+=1ll*c[p][t]*c[s][i]*dfs(S|(1<<i),i,_o);
		}
		else _o=0;
	ans%=mod;
	return f[S][p][o]=ans;
}
int g[4200005][22][2];
int val[22];
int q,x;
int main(){
	cin>>n>>m;
	cin>>s>>t,s--,t--;
	for (int i=1;i<=m;i++){
		int u,v;
		cin>>u>>v;
		u--,v--;
		c[u][v]++;
	}
	pow_2[0]=1;
	for (int i=1;i<=m;i++)pow_2[i]=pow_2[i-1]*2%mod;
	memset(f,-1,sizeof(f));
	g[0][s][1]=1;
	for (int S=0;S<(1<<n);S++){
		if ((S&(1<<s))||(S&(1<<t)))continue;
		for (int p=0;p<n;p++)
			for (int o=0;o<2;o++){
				int v=g[S][p][o],_o=1;
				if (v==0)continue;
				for (int i=0;i<n;i++){
					if (!(S&(1<<i))){
						if (i==s||i==t)continue;
						int _v=1ll*c[p][i]*v%mod;
						inc(g[S|(1<<i)][i][o|_o],_v);
						if (p==s)inc(val[i],1ll*_v*dfs(S|(1<<i),i,o|_o)%mod);
						if (o==1){
							int _v=1ll*c[p][t]*c[s][i]*v%mod;
							inc(g[S|(1<<i)][i][_o],_v);
							inc(val[i],1ll*_v*dfs(S|(1<<i),i,_o)%mod);
							if (p==s)inc(val[t],1ll*_v*dfs(S|(1<<i),i,_o)%mod);
						}
					}
					else _o=0;
				}
			}
	}
	inc(val[t],c[s][t]);
	cin>>q;
	while(q--){
		cin>>x;
		x--;
		cout<<val[x]<<endl;
	}
	return 0;
}

详细

Subtask #1:

score: 0
Memory Limit Exceeded

Test #1:

score: 0
Memory Limit Exceeded

input:

5 10
1 5
1 2
1 3
1 4
1 5
2 3
2 4
2 5
3 4
3 5
4 5
4
2
3
4
5

output:

20
14
10
15

result:


Subtask #2:

score: 0
Skipped

Dependency #1:

0%

Subtask #3:

score: 0
Skipped

Dependency #2:

0%

Subtask #4:

score: 0
Memory Limit Exceeded

Test #15:

score: 0
Memory Limit Exceeded

input:

18 324
9 8
1 1
1 2
1 3
1 4
1 5
1 6
1 7
1 8
1 9
1 10
1 11
1 12
1 13
1 14
1 15
1 16
1 17
1 18
2 1
2 2
2 3
2 4
2 5
2 6
2 7
2 8
2 9
2 10
2 11
2 12
2 13
2 14
2 15
2 16
2 17
2 18
3 1
3 2
3 3
3 4
3 5
3 6
3 7
3 8
3 9
3 10
3 11
3 12
3 13
3 14
3 15
3 16
3 17
3 18
4 1
4 2
4 3
4 4
4 5
4 6
4 7
4 8
4 9
4 10
4 11
...

output:

256104819
256104819
238677015
256104819
256104819
256104819
256104819
256104819
256104819
256104819
256104819
256104819
256104819
256104819
256104819
256104819
256104819
256104819

result:


Subtask #5:

score: 0
Skipped

Dependency #3:

0%

Subtask #6:

score: 0
Memory Limit Exceeded

Test #23:

score: 0
Memory Limit Exceeded

input:

22 9384
9 19
9 19
3 18
9 17
9 19
15 19
14 17
9 18
9 14
9 18
9 19
16 19
3 10
9 2
2 1
21 10
1 19
4 3
19 3
9 16
18 21
9 22
9 8
13 8
2 7
4 16
9 12
15 12
3 19
19 10
16 10
14 19
19 16
14 19
1 4
11 5
5 13
3 19
9 6
17 22
4 18
1 13
2 18
19 16
18 17
12 22
21 3
5 11
18 7
14 19
8 19
9 20
16 19
22 19
18 12
9 19
...

output:

596857653

result:


Subtask #7:

score: 0
Skipped

Dependency #1:

0%