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ID	Problem	Submitter	Result	Time	Memory	Language	File size	Submit time	Judge time
#207737	#5749. Directed Vertex Cacti	kkio	AC ✓	17ms	11788kb	C++17	491b	2023-10-08 19:39:13	2023-10-08 19:39:13

Judging History

你现在查看的是最新测评结果

[2023-10-08 19:39:13]
评测

测评结果：AC
用时：17ms
内存：11788kb

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[2023-10-08 19:39:13]
提交

answer

#include <bits/stdc++.h>
using namespace std;
const int maxn=1e6+10,mod=1e9+9;
typedef long long ll;
ll n,m,T,inv[maxn];
int main()
{
    scanf("%lld%lld",&n,&m);
    T=n*(n-1)/2;
    inv[1]=1;
    ll ans=1;
    for(int i=1;i<=n;i++)ans=1ll*ans*i%mod;
    for(ll i=1;i<=m;i++)
    {
        inv[i]=inv[mod%i]*(mod-mod/i)%mod;
        if(i==1)inv[i]=1;
        ans=1ll*ans*inv[i]%mod;
        ll r=(T-i+1)%mod;
        ans=1ll*ans*r%mod;
    }
    printf("%lld\n",ans);
}

Source code, Language: C++17

Details

Tip: Click on the bar to expand more detailed information

Test #1:

score: 100

Accepted

time: 0ms

memory: 3932kb

input:

3 1

output:

result:

ok 1 number(s): "18"

Test #2:

score: 0

Accepted

time: 0ms

memory: 3940kb

input:

4 4

output:

result:

ok 1 number(s): "360"

Test #3:

score: 0

Accepted

time: 5ms

memory: 7352kb

input:

39847 348708

output:

983575456

result:

ok 1 number(s): "983575456"

Test #4:

score: 0

Accepted

time: 0ms

memory: 3932kb

input:

1 1

output:

result:

ok 1 number(s): "0"

Test #5:

score: 0

Accepted

time: 0ms

memory: 3848kb

input:

3 2

output:

result:

ok 1 number(s): "18"

Test #6:

score: 0

Accepted

time: 0ms

memory: 3892kb

input:

3 3

output:

result:

ok 1 number(s): "6"

Test #7:

score: 0

Accepted

time: 0ms

memory: 3836kb

input:

3 4

output:

result:

ok 1 number(s): "0"

Test #8:

score: 0

Accepted

time: 13ms

memory: 11788kb

input:

3 1000000

output:

result:

ok 1 number(s): "0"

Test #9:

score: 0

Accepted

time: 1ms

memory: 3928kb

input:

4 1

output:

result:

ok 1 number(s): "144"

Test #10:

score: 0

Accepted

time: 0ms

memory: 3912kb

input:

4 2

output:

result:

ok 1 number(s): "360"

Test #11:

score: 0

Accepted

time: 0ms

memory: 3840kb

input:

4 3

output:

result:

ok 1 number(s): "480"

Test #12:

score: 0

Accepted

time: 0ms

memory: 3972kb

input:

4 5

output:

result:

ok 1 number(s): "144"

Test #13:

score: 0

Accepted

time: 0ms

memory: 3932kb

input:

4 6

output:

result:

ok 1 number(s): "24"

Test #14:

score: 0

Accepted

time: 0ms

memory: 3928kb

input:

5 1

output:

result:

ok 1 number(s): "1200"

Test #15:

score: 0

Accepted

time: 0ms

memory: 3932kb

input:

5 2

output:

result:

ok 1 number(s): "5400"

Test #16:

score: 0

Accepted

time: 0ms

memory: 3980kb

input:

5 3

output:

result:

ok 1 number(s): "14400"

Test #17:

score: 0

Accepted

time: 0ms

memory: 3772kb

input:

5 4

output:

result:

ok 1 number(s): "25200"

Test #18:

score: 0

Accepted

time: 0ms

memory: 3924kb

input:

5 5

output:

result:

ok 1 number(s): "30240"

Test #19:

score: 0

Accepted

time: 0ms

memory: 3852kb

input:

5 6

output:

result:

ok 1 number(s): "25200"

Test #20:

score: 0

Accepted

time: 0ms

memory: 3848kb

input:

5 7

output:

result:

ok 1 number(s): "14400"

Test #21:

score: 0

Accepted

time: 0ms

memory: 3916kb

input:

5 8

output:

result:

ok 1 number(s): "5400"

Test #22:

score: 0

Accepted

time: 0ms

memory: 3932kb

input:

5 9

output:

result:

ok 1 number(s): "1200"

Test #23:

score: 0

Accepted

time: 0ms

memory: 3980kb

input:

5 10

output:

result:

ok 1 number(s): "120"

Test #24:

score: 0

Accepted

time: 0ms

memory: 3840kb

input:

1000 1

output:

533396879

result:

ok 1 number(s): "533396879"

Test #25:

score: 0

Accepted

time: 0ms

memory: 3984kb

input:

1000 100

output:

199484478

result:

ok 1 number(s): "199484478"

Test #26:

score: 0

Accepted

time: 0ms

memory: 4048kb

input:

1000 10000

output:

656650652

result:

ok 1 number(s): "656650652"

Test #27:

score: 0

Accepted

time: 13ms

memory: 11720kb

input:

1000 1000000

output:

result:

ok 1 number(s): "0"

Test #28:

score: 0

Accepted

time: 10ms

memory: 9668kb

input:

535164 619302

output:

721871396

result:

ok 1 number(s): "721871396"

Test #29:

score: 0

Accepted

time: 17ms

memory: 11720kb

input:

1000000 1000000

output:

580712335

result:

ok 1 number(s): "580712335"

Test #30:

score: 0

Accepted

time: 7ms

memory: 5804kb

input:

1000000 234534

output:

546630669

result:

ok 1 number(s): "546630669"

Test #31:

score: 0

Accepted

time: 13ms

memory: 11656kb

input:

234523 1000000

output:

127869098

result:

ok 1 number(s): "127869098"

Test #32:

score: 0

Accepted

time: 1ms

memory: 4012kb

input:

44722 10000

output:

result:

ok 1 number(s): "0"