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QOJ

ID	Problem	Submitter	Result	Time	Memory	Language	File size	Submit time	Judge time
#110003	#5749. Directed Vertex Cacti	grass8cow	AC ✓	8ms	3860kb	C++14	456b	2023-05-31 09:39:04	2023-05-31 09:39:06

Judging History

你现在查看的是最新测评结果

[2023-08-10 23:21:45]
System Update: QOJ starts to keep a history of the judgings of all the submissions.

[2023-05-31 09:39:06]
评测

测评结果：AC
用时：8ms
内存：3860kb

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[2023-05-31 09:39:04]
提交

answer

#include<bits/stdc++.h>
using namespace std;
const int mod=1e9+9;
int qpow(int a,int b){
	int c=1;for(;b;b>>=1){
		if(b&1)c=1ll*a*c%mod;
		a=1ll*a*a%mod;
	}
	return c;
}
int n,m;
int main(){
	scanf("%d%d",&n,&m);int ans=1;
	for(int i=1;i<=n;i++)ans=1ll*i*ans%mod;
	int t=(1ll*n*(n-1)/2)%mod,p2=1;
	for(int j=1;j<=m;j++)p2=1ll*p2*j%mod,ans=1ll*ans*(t-(m-j))%mod;
	ans=1ll*ans*qpow(p2,mod-2)%mod; 
	return printf("%lld",(ans+mod)%mod),0;
}

Source code, Language: C++14

Details

Tip: Click on the bar to expand more detailed information

Test #1:

score: 100

Accepted

time: 1ms

memory: 3620kb

input:

3 1

output:

result:

ok 1 number(s): "18"

Test #2:

score: 0

Accepted

time: 1ms

memory: 3648kb

input:

4 4

output:

result:

ok 1 number(s): "360"

Test #3:

score: 0

Accepted

time: 4ms

memory: 3840kb

input:

39847 348708

output:

983575456

result:

ok 1 number(s): "983575456"

Test #4:

score: 0

Accepted

time: 2ms

memory: 3668kb

input:

1 1

output:

result:

ok 1 number(s): "0"

Test #5:

score: 0

Accepted

time: 2ms

memory: 3860kb

input:

3 2

output:

result:

ok 1 number(s): "18"

Test #6:

score: 0

Accepted

time: 2ms

memory: 3616kb

input:

3 3

output:

result:

ok 1 number(s): "6"

Test #7:

score: 0

Accepted

time: 2ms

memory: 3580kb

input:

3 4

output:

result:

ok 1 number(s): "0"

Test #8:

score: 0

Accepted

time: 6ms

memory: 3604kb

input:

3 1000000

output:

result:

ok 1 number(s): "0"

Test #9:

score: 0

Accepted

time: 0ms

memory: 3604kb

input:

4 1

output:

result:

ok 1 number(s): "144"

Test #10:

score: 0

Accepted

time: 2ms

memory: 3668kb

input:

4 2

output:

result:

ok 1 number(s): "360"

Test #11:

score: 0

Accepted

time: 2ms

memory: 3616kb

input:

4 3

output:

result:

ok 1 number(s): "480"

Test #12:

score: 0

Accepted

time: 2ms

memory: 3656kb

input:

4 5

output:

result:

ok 1 number(s): "144"

Test #13:

score: 0

Accepted

time: 0ms

memory: 3564kb

input:

4 6

output:

result:

ok 1 number(s): "24"

Test #14:

score: 0

Accepted

time: 0ms

memory: 3856kb

input:

5 1

output:

result:

ok 1 number(s): "1200"

Test #15:

score: 0

Accepted

time: 2ms

memory: 3560kb

input:

5 2

output:

result:

ok 1 number(s): "5400"

Test #16:

score: 0

Accepted

time: 2ms

memory: 3616kb

input:

5 3

output:

result:

ok 1 number(s): "14400"

Test #17:

score: 0

Accepted

time: 2ms

memory: 3580kb

input:

5 4

output:

result:

ok 1 number(s): "25200"

Test #18:

score: 0

Accepted

time: 2ms

memory: 3648kb

input:

5 5

output:

result:

ok 1 number(s): "30240"

Test #19:

score: 0

Accepted

time: 2ms

memory: 3556kb

input:

5 6

output:

result:

ok 1 number(s): "25200"

Test #20:

score: 0

Accepted

time: 2ms

memory: 3848kb

input:

5 7

output:

result:

ok 1 number(s): "14400"

Test #21:

score: 0

Accepted

time: 2ms

memory: 3620kb

input:

5 8

output:

result:

ok 1 number(s): "5400"

Test #22:

score: 0

Accepted

time: 2ms

memory: 3572kb

input:

5 9

output:

result:

ok 1 number(s): "1200"

Test #23:

score: 0

Accepted

time: 2ms

memory: 3796kb

input:

5 10

output:

result:

ok 1 number(s): "120"

Test #24:

score: 0

Accepted

time: 0ms

memory: 3668kb

input:

1000 1

output:

533396879

result:

ok 1 number(s): "533396879"

Test #25:

score: 0

Accepted

time: 1ms

memory: 3616kb

input:

1000 100

output:

199484478

result:

ok 1 number(s): "199484478"

Test #26:

score: 0

Accepted

time: 2ms

memory: 3668kb

input:

1000 10000

output:

656650652

result:

ok 1 number(s): "656650652"

Test #27:

score: 0

Accepted

time: 7ms

memory: 3800kb

input:

1000 1000000

output:

result:

ok 1 number(s): "0"

Test #28:

score: 0

Accepted

time: 7ms

memory: 3648kb

input:

535164 619302

output:

721871396

result:

ok 1 number(s): "721871396"

Test #29:

score: 0

Accepted

time: 8ms

memory: 3656kb

input:

1000000 1000000

output:

580712335

result:

ok 1 number(s): "580712335"

Test #30:

score: 0

Accepted

time: 5ms

memory: 3848kb

input:

1000000 234534

output:

546630669

result:

ok 1 number(s): "546630669"

Test #31:

score: 0

Accepted

time: 7ms

memory: 3600kb

input:

234523 1000000

output:

127869098

result:

ok 1 number(s): "127869098"

Test #32:

score: 0

Accepted

time: 1ms

memory: 3840kb

input:

44722 10000

output:

result:

ok 1 number(s): "0"