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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
#516767#8047. DFS Order 4JohnAlfnovAC ✓575ms6452kbC++14612b2024-08-12 21:19:122024-08-12 21:19:13

Judging History

你现在查看的是最新测评结果

  • [2024-08-12 21:19:13]
  • 评测
  • 测评结果:AC
  • 用时:575ms
  • 内存:6452kb
  • [2024-08-12 21:19:12]
  • 提交

answer

#include<bits/stdc++.h>
using namespace std;
int mod;
int powdv(int x,int y=mod-2){
	int ans=1;
	while(y){
		if(y&1)ans=1ll*ans*x%mod;
		y>>=1,x=1ll*x*x%mod;
	}
	return ans;
}
int ny[805],f[805][805];
int main(){
	int n;
	scanf("%d%d",&n,&mod);
	for(int i=1;i<=n;++i)ny[i]=powdv(i);
	f[0][0]=1;
	for(int i=1;i<=n;++i)for(int j=0;j<=n-i;++j){
		f[i][j]=1ll*ny[i+j]*f[i-1][0]%mod;
		for(int k=2;k<i;++k){
			f[i][j]=(f[i][j]+1ll*ny[i+j]*(f[k-1][0]-f[k-1][i+j-k]+mod)%mod*f[i-k][j])%mod;
		}
	}
	int ans=f[n-1][0];
	for(int i=1;i<n;++i)ans=1ll*ans*i%mod;
	printf("%d\n",ans);
	return 0;
}

这程序好像有点Bug,我给组数据试试?

详细

Test #1:

score: 100
Accepted
time: 1ms
memory: 3960kb

input:

4 114514199

output:

2

result:

ok 1 number(s): "2"

Test #2:

score: 0
Accepted
time: 0ms
memory: 3916kb

input:

10 998244353

output:

11033

result:

ok 1 number(s): "11033"

Test #3:

score: 0
Accepted
time: 2ms
memory: 4068kb

input:

100 1000000007

output:

270904395

result:

ok 1 number(s): "270904395"

Test #4:

score: 0
Accepted
time: 479ms
memory: 6256kb

input:

756 1001338769

output:

901942543

result:

ok 1 number(s): "901942543"

Test #5:

score: 0
Accepted
time: 546ms
memory: 6360kb

input:

793 1009036033

output:

301770320

result:

ok 1 number(s): "301770320"

Test #6:

score: 0
Accepted
time: 486ms
memory: 6336kb

input:

759 1005587659

output:

846376219

result:

ok 1 number(s): "846376219"

Test #7:

score: 0
Accepted
time: 513ms
memory: 6192kb

input:

773 1007855479

output:

1398019

result:

ok 1 number(s): "1398019"

Test #8:

score: 0
Accepted
time: 467ms
memory: 6308kb

input:

751 1006730639

output:

321287237

result:

ok 1 number(s): "321287237"

Test #9:

score: 0
Accepted
time: 535ms
memory: 6244kb

input:

778 1007760653

output:

430322899

result:

ok 1 number(s): "430322899"

Test #10:

score: 0
Accepted
time: 561ms
memory: 6400kb

input:

798 1007543827

output:

688720826

result:

ok 1 number(s): "688720826"

Test #11:

score: 0
Accepted
time: 575ms
memory: 6452kb

input:

796 1004841413

output:

258829347

result:

ok 1 number(s): "258829347"

Test #12:

score: 0
Accepted
time: 526ms
memory: 6388kb

input:

775 1005185189

output:

744278608

result:

ok 1 number(s): "744278608"

Test #13:

score: 0
Accepted
time: 561ms
memory: 6276kb

input:

800 1006012831

output:

508549367

result:

ok 1 number(s): "508549367"

Test #14:

score: 0
Accepted
time: 0ms
memory: 3868kb

input:

1 1001338769

output:

1

result:

ok 1 number(s): "1"

Test #15:

score: 0
Accepted
time: 1ms
memory: 3872kb

input:

2 1001338769

output:

1

result:

ok 1 number(s): "1"

Test #16:

score: 0
Accepted
time: 0ms
memory: 3828kb

input:

9 1009036033

output:

1780

result:

ok 1 number(s): "1780"

Test #17:

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

input:

14 1001338769

output:

43297358

result:

ok 1 number(s): "43297358"

Extra Test:

score: 0
Extra Test Passed