QOJ.ac
QOJ
| ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
|---|---|---|---|---|---|---|---|---|---|
| #207236 | #5749. Directed Vertex Cacti | lefy | WA | 9ms | 3856kb | C++14 | 561b | 2023-10-08 12:09:49 | 2023-10-08 12:09:50 |
Judging History
answer
#include <bits/stdc++.h>
#define ll long long
using namespace std;
const int mod=1e9+9;
ll pw(ll x,int cnt){
ll ans=1;
while(cnt){
if(cnt&1)ans=ans*x%mod;
x=x*x%mod;
cnt>>=1;
}
return ans;
}
int main() {
int n,m;scanf("%d%d",&n,&m);
ll fac=1;
for(int i=1;i<=n;i++)fac=fac*i%mod;
ll ans=1;
ll cn=1ll*n*(n-1)/2;
for(ll i=cn;i>cn-m;i--)ans=ans*i%mod;
ll s=1;
for(int i=1;i<=m;i++)s=s*i%mod;
ans=ans*pw(s,mod-2)%mod*fac%mod;
printf("%lld",ans);
return 0;
}
Details
Tip: Click on the bar to expand more detailed information
Test #1:
score: 100
Accepted
time: 1ms
memory: 3852kb
input:
3 1
output:
18
result:
ok 1 number(s): "18"
Test #2:
score: 0
Accepted
time: 0ms
memory: 3536kb
input:
4 4
output:
360
result:
ok 1 number(s): "360"
Test #3:
score: 0
Accepted
time: 4ms
memory: 3632kb
input:
39847 348708
output:
983575456
result:
ok 1 number(s): "983575456"
Test #4:
score: 0
Accepted
time: 0ms
memory: 3536kb
input:
1 1
output:
0
result:
ok 1 number(s): "0"
Test #5:
score: 0
Accepted
time: 1ms
memory: 3548kb
input:
3 2
output:
18
result:
ok 1 number(s): "18"
Test #6:
score: 0
Accepted
time: 0ms
memory: 3576kb
input:
3 3
output:
6
result:
ok 1 number(s): "6"
Test #7:
score: 0
Accepted
time: 0ms
memory: 3768kb
input:
3 4
output:
0
result:
ok 1 number(s): "0"
Test #8:
score: 0
Accepted
time: 9ms
memory: 3536kb
input:
3 1000000
output:
0
result:
ok 1 number(s): "0"
Test #9:
score: 0
Accepted
time: 0ms
memory: 3544kb
input:
4 1
output:
144
result:
ok 1 number(s): "144"
Test #10:
score: 0
Accepted
time: 1ms
memory: 3632kb
input:
4 2
output:
360
result:
ok 1 number(s): "360"
Test #11:
score: 0
Accepted
time: 1ms
memory: 3848kb
input:
4 3
output:
480
result:
ok 1 number(s): "480"
Test #12:
score: 0
Accepted
time: 1ms
memory: 3552kb
input:
4 5
output:
144
result:
ok 1 number(s): "144"
Test #13:
score: 0
Accepted
time: 0ms
memory: 3544kb
input:
4 6
output:
24
result:
ok 1 number(s): "24"
Test #14:
score: 0
Accepted
time: 0ms
memory: 3576kb
input:
5 1
output:
1200
result:
ok 1 number(s): "1200"
Test #15:
score: 0
Accepted
time: 0ms
memory: 3804kb
input:
5 2
output:
5400
result:
ok 1 number(s): "5400"
Test #16:
score: 0
Accepted
time: 1ms
memory: 3848kb
input:
5 3
output:
14400
result:
ok 1 number(s): "14400"
Test #17:
score: 0
Accepted
time: 0ms
memory: 3856kb
input:
5 4
output:
25200
result:
ok 1 number(s): "25200"
Test #18:
score: 0
Accepted
time: 0ms
memory: 3628kb
input:
5 5
output:
30240
result:
ok 1 number(s): "30240"
Test #19:
score: 0
Accepted
time: 0ms
memory: 3672kb
input:
5 6
output:
25200
result:
ok 1 number(s): "25200"
Test #20:
score: 0
Accepted
time: 1ms
memory: 3836kb
input:
5 7
output:
14400
result:
ok 1 number(s): "14400"
Test #21:
score: 0
Accepted
time: 1ms
memory: 3800kb
input:
5 8
output:
5400
result:
ok 1 number(s): "5400"
Test #22:
score: 0
Accepted
time: 0ms
memory: 3804kb
input:
5 9
output:
1200
result:
ok 1 number(s): "1200"
Test #23:
score: 0
Accepted
time: 0ms
memory: 3540kb
input:
5 10
output:
120
result:
ok 1 number(s): "120"
Test #24:
score: 0
Accepted
time: 0ms
memory: 3680kb
input:
1000 1
output:
533396879
result:
ok 1 number(s): "533396879"
Test #25:
score: 0
Accepted
time: 1ms
memory: 3536kb
input:
1000 100
output:
199484478
result:
ok 1 number(s): "199484478"
Test #26:
score: 0
Accepted
time: 0ms
memory: 3700kb
input:
1000 10000
output:
656650652
result:
ok 1 number(s): "656650652"
Test #27:
score: 0
Accepted
time: 9ms
memory: 3804kb
input:
1000 1000000
output:
0
result:
ok 1 number(s): "0"
Test #28:
score: -100
Wrong Answer
time: 4ms
memory: 3672kb
input:
535164 619302
output:
456316566
result:
wrong answer 1st numbers differ - expected: '721871396', found: '456316566'