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QOJ
| ID | 题目 | 提交者 | 结果 | 用时 | 内存 | 语言 | 文件大小 | 提交时间 | 测评时间 |
|---|---|---|---|---|---|---|---|---|---|
| #207819 | #5749. Directed Vertex Cacti | c20230139 | AC ✓ | 9ms | 3856kb | C++17 | 475b | 2023-10-08 20:57:36 | 2023-10-08 20:57:36 |
Judging History
answer
#include<bits/stdc++.h>
using namespace std;
#define int long long
const int mod=1e9+9;
int qpow(int a,int b){
int res=1;
while(b) {
if(b&1) res=res*a%mod;
b>>=1;
a=a*a%mod;
}
return res;
}
signed main(){
int n,m,ans=1;
scanf("%lld%lld",&n,&m);
for(int i=1;i<=n;i++)ans=i*ans%mod;
int t=(n*(n-1)/2)%mod,p2=1;
for(int i=1;i<=m;i++)p2=p2*i%mod,ans=ans*(t-(m-i))%mod;
ans=ans*qpow(p2,mod-2)%mod;
printf("%lld",(ans+mod)%mod);
return 0;
}
详细
Test #1:
score: 100
Accepted
time: 1ms
memory: 3540kb
input:
3 1
output:
18
result:
ok 1 number(s): "18"
Test #2:
score: 0
Accepted
time: 0ms
memory: 3632kb
input:
4 4
output:
360
result:
ok 1 number(s): "360"
Test #3:
score: 0
Accepted
time: 2ms
memory: 3632kb
input:
39847 348708
output:
983575456
result:
ok 1 number(s): "983575456"
Test #4:
score: 0
Accepted
time: 1ms
memory: 3844kb
input:
1 1
output:
0
result:
ok 1 number(s): "0"
Test #5:
score: 0
Accepted
time: 0ms
memory: 3544kb
input:
3 2
output:
18
result:
ok 1 number(s): "18"
Test #6:
score: 0
Accepted
time: 0ms
memory: 3852kb
input:
3 3
output:
6
result:
ok 1 number(s): "6"
Test #7:
score: 0
Accepted
time: 0ms
memory: 3632kb
input:
3 4
output:
0
result:
ok 1 number(s): "0"
Test #8:
score: 0
Accepted
time: 5ms
memory: 3840kb
input:
3 1000000
output:
0
result:
ok 1 number(s): "0"
Test #9:
score: 0
Accepted
time: 0ms
memory: 3684kb
input:
4 1
output:
144
result:
ok 1 number(s): "144"
Test #10:
score: 0
Accepted
time: 0ms
memory: 3548kb
input:
4 2
output:
360
result:
ok 1 number(s): "360"
Test #11:
score: 0
Accepted
time: 1ms
memory: 3852kb
input:
4 3
output:
480
result:
ok 1 number(s): "480"
Test #12:
score: 0
Accepted
time: 1ms
memory: 3536kb
input:
4 5
output:
144
result:
ok 1 number(s): "144"
Test #13:
score: 0
Accepted
time: 0ms
memory: 3848kb
input:
4 6
output:
24
result:
ok 1 number(s): "24"
Test #14:
score: 0
Accepted
time: 0ms
memory: 3856kb
input:
5 1
output:
1200
result:
ok 1 number(s): "1200"
Test #15:
score: 0
Accepted
time: 0ms
memory: 3624kb
input:
5 2
output:
5400
result:
ok 1 number(s): "5400"
Test #16:
score: 0
Accepted
time: 0ms
memory: 3580kb
input:
5 3
output:
14400
result:
ok 1 number(s): "14400"
Test #17:
score: 0
Accepted
time: 0ms
memory: 3804kb
input:
5 4
output:
25200
result:
ok 1 number(s): "25200"
Test #18:
score: 0
Accepted
time: 0ms
memory: 3536kb
input:
5 5
output:
30240
result:
ok 1 number(s): "30240"
Test #19:
score: 0
Accepted
time: 0ms
memory: 3544kb
input:
5 6
output:
25200
result:
ok 1 number(s): "25200"
Test #20:
score: 0
Accepted
time: 0ms
memory: 3852kb
input:
5 7
output:
14400
result:
ok 1 number(s): "14400"
Test #21:
score: 0
Accepted
time: 0ms
memory: 3836kb
input:
5 8
output:
5400
result:
ok 1 number(s): "5400"
Test #22:
score: 0
Accepted
time: 0ms
memory: 3844kb
input:
5 9
output:
1200
result:
ok 1 number(s): "1200"
Test #23:
score: 0
Accepted
time: 0ms
memory: 3804kb
input:
5 10
output:
120
result:
ok 1 number(s): "120"
Test #24:
score: 0
Accepted
time: 0ms
memory: 3544kb
input:
1000 1
output:
533396879
result:
ok 1 number(s): "533396879"
Test #25:
score: 0
Accepted
time: 0ms
memory: 3548kb
input:
1000 100
output:
199484478
result:
ok 1 number(s): "199484478"
Test #26:
score: 0
Accepted
time: 0ms
memory: 3572kb
input:
1000 10000
output:
656650652
result:
ok 1 number(s): "656650652"
Test #27:
score: 0
Accepted
time: 5ms
memory: 3692kb
input:
1000 1000000
output:
0
result:
ok 1 number(s): "0"
Test #28:
score: 0
Accepted
time: 2ms
memory: 3808kb
input:
535164 619302
output:
721871396
result:
ok 1 number(s): "721871396"
Test #29:
score: 0
Accepted
time: 9ms
memory: 3624kb
input:
1000000 1000000
output:
580712335
result:
ok 1 number(s): "580712335"
Test #30:
score: 0
Accepted
time: 6ms
memory: 3552kb
input:
1000000 234534
output:
546630669
result:
ok 1 number(s): "546630669"
Test #31:
score: 0
Accepted
time: 6ms
memory: 3600kb
input:
234523 1000000
output:
127869098
result:
ok 1 number(s): "127869098"
Test #32:
score: 0
Accepted
time: 1ms
memory: 3844kb
input:
44722 10000
output:
0
result:
ok 1 number(s): "0"