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IDProblemSubmitterResultTimeMemoryLanguageFile sizeSubmit timeJudge time
#208634#5749. Directed Vertex CacticzcAC ✓12ms3732kbC++14581b2023-10-09 19:31:192023-10-09 19:31:20

Judging History

你现在查看的是最新测评结果

  • [2023-10-09 19:31:20]
  • 评测
  • 测评结果:AC
  • 用时:12ms
  • 内存:3732kb
  • [2023-10-09 19:31:19]
  • 提交

answer

#include<bits/stdc++.h>
using namespace std;
#define int long long
int n,m;
const int mod=1e9+9;
inline int qpow(int a,int b){
	int ret=1;
	for( ; b; b>>=1){
		if(b&1) ret=ret*a%mod;
		a=a*a%mod;
	}
	return ret;
}
inline int C(int x,int y){
	if(x<y) return 0;
	int ret=1ll,inv=1ll;
	for(int i=max(x-y,y)+1ll;i<=x;i++) ret=ret*i%mod;
	for(int i=1ll;i<=min(x-y,y);i++) inv=inv*i%mod;
	return ret*qpow(inv,mod-2)%mod;
}
signed main(){
	cin>>n>>m;
	int ans=1;
	for(int i=1;i<=n;i++)  ans=ans*i%mod;
	ans=ans*C((n*(n-1)/2)%mod,m)%mod;
	cout<<ans;
	return 0;
}

Details

Tip: Click on the bar to expand more detailed information

Test #1:

score: 100
Accepted
time: 0ms
memory: 3584kb

input:

3 1

output:

18

result:

ok 1 number(s): "18"

Test #2:

score: 0
Accepted
time: 0ms
memory: 3656kb

input:

4 4

output:

360

result:

ok 1 number(s): "360"

Test #3:

score: 0
Accepted
time: 3ms
memory: 3656kb

input:

39847 348708

output:

983575456

result:

ok 1 number(s): "983575456"

Test #4:

score: 0
Accepted
time: 0ms
memory: 3712kb

input:

1 1

output:

0

result:

ok 1 number(s): "0"

Test #5:

score: 0
Accepted
time: 0ms
memory: 3588kb

input:

3 2

output:

18

result:

ok 1 number(s): "18"

Test #6:

score: 0
Accepted
time: 0ms
memory: 3580kb

input:

3 3

output:

6

result:

ok 1 number(s): "6"

Test #7:

score: 0
Accepted
time: 0ms
memory: 3648kb

input:

3 4

output:

0

result:

ok 1 number(s): "0"

Test #8:

score: 0
Accepted
time: 0ms
memory: 3732kb

input:

3 1000000

output:

0

result:

ok 1 number(s): "0"

Test #9:

score: 0
Accepted
time: 0ms
memory: 3584kb

input:

4 1

output:

144

result:

ok 1 number(s): "144"

Test #10:

score: 0
Accepted
time: 0ms
memory: 3716kb

input:

4 2

output:

360

result:

ok 1 number(s): "360"

Test #11:

score: 0
Accepted
time: 0ms
memory: 3664kb

input:

4 3

output:

480

result:

ok 1 number(s): "480"

Test #12:

score: 0
Accepted
time: 0ms
memory: 3584kb

input:

4 5

output:

144

result:

ok 1 number(s): "144"

Test #13:

score: 0
Accepted
time: 0ms
memory: 3656kb

input:

4 6

output:

24

result:

ok 1 number(s): "24"

Test #14:

score: 0
Accepted
time: 0ms
memory: 3652kb

input:

5 1

output:

1200

result:

ok 1 number(s): "1200"

Test #15:

score: 0
Accepted
time: 0ms
memory: 3648kb

input:

5 2

output:

5400

result:

ok 1 number(s): "5400"

Test #16:

score: 0
Accepted
time: 0ms
memory: 3708kb

input:

5 3

output:

14400

result:

ok 1 number(s): "14400"

Test #17:

score: 0
Accepted
time: 0ms
memory: 3588kb

input:

5 4

output:

25200

result:

ok 1 number(s): "25200"

Test #18:

score: 0
Accepted
time: 0ms
memory: 3508kb

input:

5 5

output:

30240

result:

ok 1 number(s): "30240"

Test #19:

score: 0
Accepted
time: 0ms
memory: 3664kb

input:

5 6

output:

25200

result:

ok 1 number(s): "25200"

Test #20:

score: 0
Accepted
time: 0ms
memory: 3664kb

input:

5 7

output:

14400

result:

ok 1 number(s): "14400"

Test #21:

score: 0
Accepted
time: 0ms
memory: 3648kb

input:

5 8

output:

5400

result:

ok 1 number(s): "5400"

Test #22:

score: 0
Accepted
time: 0ms
memory: 3536kb

input:

5 9

output:

1200

result:

ok 1 number(s): "1200"

Test #23:

score: 0
Accepted
time: 0ms
memory: 3668kb

input:

5 10

output:

120

result:

ok 1 number(s): "120"

Test #24:

score: 0
Accepted
time: 0ms
memory: 3724kb

input:

1000 1

output:

533396879

result:

ok 1 number(s): "533396879"

Test #25:

score: 0
Accepted
time: 0ms
memory: 3528kb

input:

1000 100

output:

199484478

result:

ok 1 number(s): "199484478"

Test #26:

score: 0
Accepted
time: 0ms
memory: 3580kb

input:

1000 10000

output:

656650652

result:

ok 1 number(s): "656650652"

Test #27:

score: 0
Accepted
time: 0ms
memory: 3580kb

input:

1000 1000000

output:

0

result:

ok 1 number(s): "0"

Test #28:

score: 0
Accepted
time: 7ms
memory: 3532kb

input:

535164 619302

output:

721871396

result:

ok 1 number(s): "721871396"

Test #29:

score: 0
Accepted
time: 12ms
memory: 3720kb

input:

1000000 1000000

output:

580712335

result:

ok 1 number(s): "580712335"

Test #30:

score: 0
Accepted
time: 6ms
memory: 3652kb

input:

1000000 234534

output:

546630669

result:

ok 1 number(s): "546630669"

Test #31:

score: 0
Accepted
time: 9ms
memory: 3584kb

input:

234523 1000000

output:

127869098

result:

ok 1 number(s): "127869098"

Test #32:

score: 0
Accepted
time: 1ms
memory: 3588kb

input:

44722 10000

output:

0

result:

ok 1 number(s): "0"