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ID	Problem	Submitter	Result	Time	Memory	Language	File size	Submit time	Judge time
#87278	#5749. Directed Vertex Cacti	zhouhuanyi	AC ✓	21ms	7668kb	C++11	665b	2023-03-12 10:13:37	2023-03-12 10:13:41

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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.

[2023-03-12 10:13:41]
评测

测评结果：AC
用时：21ms
内存：7668kb

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[2023-03-12 10:13:37]
提交

answer

#include<iostream>
#include<cstdio>
#define N 1000000
#define mod 1000000009
using namespace std;
int read()
{
    char c=0;
    int sum=0;
    while (c<'0'||c>'9') c=getchar();
    while ('0'<=c&&c<='9') sum=sum*10+c-'0',c=getchar();
    return sum;
}
int MD2(int x)
{
    return x<0?x+mod:x;
}
int n,m,inv[N+1],ans=1;
int main()
{
    int rst;
    inv[1]=1;
    for (int i=2;i<=N;++i) inv[i]=MD2(-1ll*(mod/i)*inv[mod%i]%mod);
    n=read(),m=read(),rst=1ll*n*(n-1)%mod*inv[2]%mod;
    for (int i=1;i<=m;++i) ans=1ll*ans*MD2(rst-i+1)%mod*inv[i]%mod;
    for (int i=1;i<=n;++i) ans=1ll*ans*i%mod;
    printf("%d\n",ans);
    return 0;
}

Source code, Language: C++11

Details

Tip: Click on the bar to expand more detailed information

Test #1:

score: 100

Accepted

time: 6ms

memory: 7424kb

input:

3 1

output:

result:

ok 1 number(s): "18"

Test #2:

score: 0

Accepted

time: 9ms

memory: 7420kb

input:

4 4

output:

result:

ok 1 number(s): "360"

Test #3:

score: 0

Accepted

time: 4ms

memory: 7588kb

input:

39847 348708

output:

983575456

result:

ok 1 number(s): "983575456"

Test #4:

score: 0

Accepted

time: 5ms

memory: 7368kb

input:

1 1

output:

result:

ok 1 number(s): "0"

Test #5:

score: 0

Accepted

time: 3ms

memory: 7364kb

input:

3 2

output:

result:

ok 1 number(s): "18"

Test #6:

score: 0

Accepted

time: 9ms

memory: 7368kb

input:

3 3

output:

result:

ok 1 number(s): "6"

Test #7:

score: 0

Accepted

time: 6ms

memory: 7336kb

input:

3 4

output:

result:

ok 1 number(s): "0"

Test #8:

score: 0

Accepted

time: 18ms

memory: 7432kb

input:

3 1000000

output:

result:

ok 1 number(s): "0"

Test #9:

score: 0

Accepted

time: 10ms

memory: 7328kb

input:

4 1

output:

result:

ok 1 number(s): "144"

Test #10:

score: 0

Accepted

time: 10ms

memory: 7364kb

input:

4 2

output:

result:

ok 1 number(s): "360"

Test #11:

score: 0

Accepted

time: 11ms

memory: 7364kb

input:

4 3

output:

result:

ok 1 number(s): "480"

Test #12:

score: 0

Accepted

time: 10ms

memory: 7416kb

input:

4 5

output:

result:

ok 1 number(s): "144"

Test #13:

score: 0

Accepted

time: 7ms

memory: 7668kb

input:

4 6

output:

result:

ok 1 number(s): "24"

Test #14:

score: 0

Accepted

time: 3ms

memory: 7332kb

input:

5 1

output:

result:

ok 1 number(s): "1200"

Test #15:

score: 0

Accepted

time: 7ms

memory: 7444kb

input:

5 2

output:

result:

ok 1 number(s): "5400"

Test #16:

score: 0

Accepted

time: 10ms

memory: 7436kb

input:

5 3

output:

result:

ok 1 number(s): "14400"

Test #17:

score: 0

Accepted

time: 6ms

memory: 7460kb

input:

5 4

output:

result:

ok 1 number(s): "25200"

Test #18:

score: 0

Accepted

time: 10ms

memory: 7468kb

input:

5 5

output:

result:

ok 1 number(s): "30240"

Test #19:

score: 0

Accepted

time: 10ms

memory: 7368kb

input:

5 6

output:

result:

ok 1 number(s): "25200"

Test #20:

score: 0

Accepted

time: 10ms

memory: 7460kb

input:

5 7

output:

result:

ok 1 number(s): "14400"

Test #21:

score: 0

Accepted

time: 4ms

memory: 7456kb

input:

5 8

output:

result:

ok 1 number(s): "5400"

Test #22:

score: 0

Accepted

time: 11ms

memory: 7396kb

input:

5 9

output:

result:

ok 1 number(s): "1200"

Test #23:

score: 0

Accepted

time: 10ms

memory: 7588kb

input:

5 10

output:

result:

ok 1 number(s): "120"

Test #24:

score: 0

Accepted

time: 10ms

memory: 7416kb

input:

1000 1

output:

533396879

result:

ok 1 number(s): "533396879"

Test #25:

score: 0

Accepted

time: 5ms

memory: 7420kb

input:

1000 100

output:

199484478

result:

ok 1 number(s): "199484478"

Test #26:

score: 0

Accepted

time: 9ms

memory: 7332kb

input:

1000 10000

output:

656650652

result:

ok 1 number(s): "656650652"

Test #27:

score: 0

Accepted

time: 14ms

memory: 7360kb

input:

1000 1000000

output:

result:

ok 1 number(s): "0"

Test #28:

score: 0

Accepted

time: 17ms

memory: 7392kb

input:

535164 619302

output:

721871396

result:

ok 1 number(s): "721871396"

Test #29:

score: 0

Accepted

time: 21ms

memory: 7608kb

input:

1000000 1000000

output:

580712335

result:

ok 1 number(s): "580712335"

Test #30:

score: 0

Accepted

time: 16ms

memory: 7620kb

input:

1000000 234534

output:

546630669

result:

ok 1 number(s): "546630669"

Test #31:

score: 0

Accepted

time: 17ms

memory: 7616kb

input:

234523 1000000

output:

127869098

result:

ok 1 number(s): "127869098"

Test #32:

score: 0

Accepted

time: 5ms

memory: 7420kb

input:

44722 10000

output:

result:

ok 1 number(s): "0"