QOJ.ac

QOJ

ID	Problem	Submitter	Result	Time	Memory	Language	File size	Submit time	Judge time
#87480	#5749. Directed Vertex Cacti	xiaoyaowudi	AC ✓	18ms	7336kb	C++14	440b	2023-03-13 10:18:45	2023-03-13 10:18:48

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.

[2023-03-13 10:18:48]
评测

测评结果：AC
用时：18ms
内存：7336kb

查看

[2023-03-13 10:18:45]
提交

answer

#include <iostream>
#include <algorithm>
constexpr int p(1e9+9),N(1e6+10);
using ll=long long;
int main()
{
	int n,m;std::cin>>n>>m;
	static int inv[N];inv[1]=1;for(int i(2);i<=m;++i) inv[i]=1ll*inv[p%i]*(p-p/i)%p;
	ll k(1ll*n*(n-1)/2);
	k%=p;
	int ans(0);
	if(k>=m)
	{
		ans=1;
		for(int i(1);i<=m;++i) ans=1ll*(k-i+1)*inv[i]%p*ans%p;
		for(int i(1);i<=n;++i) ans=1ll*ans*i%p;
	}
	std::cout<<ans<<std::endl;
	return 0;
}

Source code, Language: C++14

Details

Tip: Click on the bar to expand more detailed information

Test #1:

score: 100

Accepted

time: 2ms

memory: 3264kb

input:

3 1

output:

result:

ok 1 number(s): "18"

Test #2:

score: 0

Accepted

time: 2ms

memory: 3352kb

input:

4 4

output:

result:

ok 1 number(s): "360"

Test #3:

score: 0

Accepted

time: 3ms

memory: 6860kb

input:

39847 348708

output:

983575456

result:

ok 1 number(s): "983575456"

Test #4:

score: 0

Accepted

time: 0ms

memory: 3324kb

input:

1 1

output:

result:

ok 1 number(s): "0"

Test #5:

score: 0

Accepted

time: 2ms

memory: 3320kb

input:

3 2

output:

result:

ok 1 number(s): "18"

Test #6:

score: 0

Accepted

time: 0ms

memory: 3308kb

input:

3 3

output:

result:

ok 1 number(s): "6"

Test #7:

score: 0

Accepted

time: 2ms

memory: 3496kb

input:

3 4

output:

result:

ok 1 number(s): "0"

Test #8:

score: 0

Accepted

time: 7ms

memory: 7136kb

input:

3 1000000

output:

result:

ok 1 number(s): "0"

Test #9:

score: 0

Accepted

time: 0ms

memory: 3504kb

input:

4 1

output:

result:

ok 1 number(s): "144"

Test #10:

score: 0

Accepted

time: 1ms

memory: 3320kb

input:

4 2

output:

result:

ok 1 number(s): "360"

Test #11:

score: 0

Accepted

time: 2ms

memory: 3316kb

input:

4 3

output:

result:

ok 1 number(s): "480"

Test #12:

score: 0

Accepted

time: 2ms

memory: 3436kb

input:

4 5

output:

result:

ok 1 number(s): "144"

Test #13:

score: 0

Accepted

time: 0ms

memory: 3468kb

input:

4 6

output:

result:

ok 1 number(s): "24"

Test #14:

score: 0

Accepted

time: 2ms

memory: 3320kb

input:

5 1

output:

result:

ok 1 number(s): "1200"

Test #15:

score: 0

Accepted

time: 1ms

memory: 3348kb

input:

5 2

output:

result:

ok 1 number(s): "5400"

Test #16:

score: 0

Accepted

time: 0ms

memory: 3300kb

input:

5 3

output:

result:

ok 1 number(s): "14400"

Test #17:

score: 0

Accepted

time: 2ms

memory: 3432kb

input:

5 4

output:

result:

ok 1 number(s): "25200"

Test #18:

score: 0

Accepted

time: 1ms

memory: 3268kb

input:

5 5

output:

result:

ok 1 number(s): "30240"

Test #19:

score: 0

Accepted

time: 2ms

memory: 3432kb

input:

5 6

output:

result:

ok 1 number(s): "25200"

Test #20:

score: 0

Accepted

time: 0ms

memory: 3440kb

input:

5 7

output:

result:

ok 1 number(s): "14400"

Test #21:

score: 0

Accepted

time: 2ms

memory: 3312kb

input:

5 8

output:

result:

ok 1 number(s): "5400"

Test #22:

score: 0

Accepted

time: 2ms

memory: 3316kb

input:

5 9

output:

result:

ok 1 number(s): "1200"

Test #23:

score: 0

Accepted

time: 2ms

memory: 3324kb

input:

5 10

output:

result:

ok 1 number(s): "120"

Test #24:

score: 0

Accepted

time: 2ms

memory: 3352kb

input:

1000 1

output:

533396879

result:

ok 1 number(s): "533396879"

Test #25:

score: 0

Accepted

time: 2ms

memory: 3348kb

input:

1000 100

output:

199484478

result:

ok 1 number(s): "199484478"

Test #26:

score: 0

Accepted

time: 2ms

memory: 3388kb

input:

1000 10000

output:

656650652

result:

ok 1 number(s): "656650652"

Test #27:

score: 0

Accepted

time: 10ms

memory: 7172kb

input:

1000 1000000

output:

result:

ok 1 number(s): "0"

Test #28:

score: 0

Accepted

time: 8ms

memory: 5764kb

input:

535164 619302

output:

721871396

result:

ok 1 number(s): "721871396"

Test #29:

score: 0

Accepted

time: 13ms

memory: 7336kb

input:

1000000 1000000

output:

580712335

result:

ok 1 number(s): "580712335"

Test #30:

score: 0

Accepted

time: 6ms

memory: 4228kb

input:

1000000 234534

output:

546630669

result:

ok 1 number(s): "546630669"

Test #31:

score: 0

Accepted

time: 18ms

memory: 7216kb

input:

234523 1000000

output:

127869098

result:

ok 1 number(s): "127869098"

Test #32:

score: 0

Accepted

time: 2ms

memory: 3352kb

input:

44722 10000

output:

result:

ok 1 number(s): "0"