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IDProblemSubmitterResultTimeMemoryLanguageFile sizeSubmit timeJudge time
#397963#8047. DFS Order 4grass8cowAC ✓463ms6432kbC++17577b2024-04-24 20:43:452024-04-24 20:43:46

Judging History

你现在查看的是最新测评结果

  • [2024-04-24 20:43:46]
  • 评测
  • 测评结果:AC
  • 用时:463ms
  • 内存:6432kb
  • [2024-04-24 20:43:45]
  • 提交

answer

#include<bits/stdc++.h>
using namespace std;
int n,f[810][810],inv[810],mod;
int main(){
	scanf("%d%d",&n,&mod);
	f[1][0]=1;inv[1]=1;
	for(int i=2;i<=n;i++)inv[i]=mod-1ll*inv[mod%i]*(mod/i)%mod;
	for(int i=2;i<=n;i++){
		for(int j=0;i+j<=n;j++){
			f[i][j]=f[i-1][0];
			//只有一个子树 
			for(int k=2;k+1<i;k++)
			(f[i][j]+=1ll*f[i-k][j]*(f[k][0]-f[k][i-1-k+j])%mod)%=mod;
			//k:第一个子树的大小 
			f[i][j]=1ll*f[i][j]*inv[i+j-1]%mod;
		}
	}
	int ans=f[n][0];
	for(int i=1;i<n;i++)ans=1ll*ans*i%mod;
	return printf("%d",(ans+mod)%mod),0;
}

这程序好像有点Bug,我给组数据试试?

Details

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Test #1:

score: 100
Accepted
time: 1ms
memory: 3904kb

input:

4 114514199

output:

2

result:

ok 1 number(s): "2"

Test #2:

score: 0
Accepted
time: 0ms
memory: 3924kb

input:

10 998244353

output:

11033

result:

ok 1 number(s): "11033"

Test #3:

score: 0
Accepted
time: 1ms
memory: 4276kb

input:

100 1000000007

output:

270904395

result:

ok 1 number(s): "270904395"

Test #4:

score: 0
Accepted
time: 391ms
memory: 6348kb

input:

756 1001338769

output:

901942543

result:

ok 1 number(s): "901942543"

Test #5:

score: 0
Accepted
time: 454ms
memory: 6368kb

input:

793 1009036033

output:

301770320

result:

ok 1 number(s): "301770320"

Test #6:

score: 0
Accepted
time: 394ms
memory: 6112kb

input:

759 1005587659

output:

846376219

result:

ok 1 number(s): "846376219"

Test #7:

score: 0
Accepted
time: 419ms
memory: 6352kb

input:

773 1007855479

output:

1398019

result:

ok 1 number(s): "1398019"

Test #8:

score: 0
Accepted
time: 382ms
memory: 6328kb

input:

751 1006730639

output:

321287237

result:

ok 1 number(s): "321287237"

Test #9:

score: 0
Accepted
time: 426ms
memory: 6384kb

input:

778 1007760653

output:

430322899

result:

ok 1 number(s): "430322899"

Test #10:

score: 0
Accepted
time: 455ms
memory: 6428kb

input:

798 1007543827

output:

688720826

result:

ok 1 number(s): "688720826"

Test #11:

score: 0
Accepted
time: 455ms
memory: 6432kb

input:

796 1004841413

output:

258829347

result:

ok 1 number(s): "258829347"

Test #12:

score: 0
Accepted
time: 419ms
memory: 6404kb

input:

775 1005185189

output:

744278608

result:

ok 1 number(s): "744278608"

Test #13:

score: 0
Accepted
time: 463ms
memory: 6428kb

input:

800 1006012831

output:

508549367

result:

ok 1 number(s): "508549367"

Test #14:

score: 0
Accepted
time: 0ms
memory: 3912kb

input:

1 1001338769

output:

1

result:

ok 1 number(s): "1"

Test #15:

score: 0
Accepted
time: 0ms
memory: 3760kb

input:

2 1001338769

output:

1

result:

ok 1 number(s): "1"

Test #16:

score: 0
Accepted
time: 0ms
memory: 3924kb

input:

9 1009036033

output:

1780

result:

ok 1 number(s): "1780"

Test #17:

score: 0
Accepted
time: 0ms
memory: 3932kb

input:

14 1001338769

output:

43297358

result:

ok 1 number(s): "43297358"

Extra Test:

score: 0
Extra Test Passed