QOJ.ac
QOJ
| ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
|---|---|---|---|---|---|---|---|---|---|
| #88567 | #5749. Directed Vertex Cacti | yyyyxh | AC ✓ | 26ms | 5352kb | C++14 | 588b | 2023-03-16 15:40:37 | 2023-03-16 15:40:40 |
Judging History
answer
#include <cstdio>
using namespace std;
int read(){
char c=getchar();int x=0;
while(c<48||c>57) c=getchar();
do x=(x<<1)+(x<<3)+(c^48),c=getchar();
while(c>=48&&c<=57);
return x;
}
const int P=1000000009;
int n,m;
int inv[1000003];
int main(){
n=read();m=read();
long long ed=(long long)n*(n-1)>>1;
int res=1;
for(int i=0;i<m;++i) res=(ed-i)%P*res%P;
for(int i=1;i<=n;++i) res=(long long)res*i%P;
inv[1]=1;
for(int i=2;i<=m;++i) inv[i]=(long long)inv[P%i]*(P-P/i)%P;
for(int i=1;i<=m;++i) res=(long long)res*inv[i]%P;
printf("%d\n",res);
return 0;
}
Details
Tip: Click on the bar to expand more detailed information
Test #1:
score: 100
Accepted
time: 0ms
memory: 1764kb
input:
3 1
output:
18
result:
ok 1 number(s): "18"
Test #2:
score: 0
Accepted
time: 0ms
memory: 1736kb
input:
4 4
output:
360
result:
ok 1 number(s): "360"
Test #3:
score: 0
Accepted
time: 2ms
memory: 2716kb
input:
39847 348708
output:
983575456
result:
ok 1 number(s): "983575456"
Test #4:
score: 0
Accepted
time: 0ms
memory: 1560kb
input:
1 1
output:
0
result:
ok 1 number(s): "0"
Test #5:
score: 0
Accepted
time: 1ms
memory: 1764kb
input:
3 2
output:
18
result:
ok 1 number(s): "18"
Test #6:
score: 0
Accepted
time: 1ms
memory: 1448kb
input:
3 3
output:
6
result:
ok 1 number(s): "6"
Test #7:
score: 0
Accepted
time: 1ms
memory: 1720kb
input:
3 4
output:
0
result:
ok 1 number(s): "0"
Test #8:
score: 0
Accepted
time: 26ms
memory: 5336kb
input:
3 1000000
output:
0
result:
ok 1 number(s): "0"
Test #9:
score: 0
Accepted
time: 1ms
memory: 1748kb
input:
4 1
output:
144
result:
ok 1 number(s): "144"
Test #10:
score: 0
Accepted
time: 1ms
memory: 1712kb
input:
4 2
output:
360
result:
ok 1 number(s): "360"
Test #11:
score: 0
Accepted
time: 1ms
memory: 1748kb
input:
4 3
output:
480
result:
ok 1 number(s): "480"
Test #12:
score: 0
Accepted
time: 1ms
memory: 1720kb
input:
4 5
output:
144
result:
ok 1 number(s): "144"
Test #13:
score: 0
Accepted
time: 1ms
memory: 1744kb
input:
4 6
output:
24
result:
ok 1 number(s): "24"
Test #14:
score: 0
Accepted
time: 1ms
memory: 1712kb
input:
5 1
output:
1200
result:
ok 1 number(s): "1200"
Test #15:
score: 0
Accepted
time: 1ms
memory: 1688kb
input:
5 2
output:
5400
result:
ok 1 number(s): "5400"
Test #16:
score: 0
Accepted
time: 1ms
memory: 1692kb
input:
5 3
output:
14400
result:
ok 1 number(s): "14400"
Test #17:
score: 0
Accepted
time: 0ms
memory: 1496kb
input:
5 4
output:
25200
result:
ok 1 number(s): "25200"
Test #18:
score: 0
Accepted
time: 0ms
memory: 1500kb
input:
5 5
output:
30240
result:
ok 1 number(s): "30240"
Test #19:
score: 0
Accepted
time: 1ms
memory: 1432kb
input:
5 6
output:
25200
result:
ok 1 number(s): "25200"
Test #20:
score: 0
Accepted
time: 1ms
memory: 1720kb
input:
5 7
output:
14400
result:
ok 1 number(s): "14400"
Test #21:
score: 0
Accepted
time: 1ms
memory: 1472kb
input:
5 8
output:
5400
result:
ok 1 number(s): "5400"
Test #22:
score: 0
Accepted
time: 1ms
memory: 1440kb
input:
5 9
output:
1200
result:
ok 1 number(s): "1200"
Test #23:
score: 0
Accepted
time: 1ms
memory: 1872kb
input:
5 10
output:
120
result:
ok 1 number(s): "120"
Test #24:
score: 0
Accepted
time: 1ms
memory: 1476kb
input:
1000 1
output:
533396879
result:
ok 1 number(s): "533396879"
Test #25:
score: 0
Accepted
time: 1ms
memory: 1444kb
input:
1000 100
output:
199484478
result:
ok 1 number(s): "199484478"
Test #26:
score: 0
Accepted
time: 1ms
memory: 1752kb
input:
1000 10000
output:
656650652
result:
ok 1 number(s): "656650652"
Test #27:
score: 0
Accepted
time: 11ms
memory: 5288kb
input:
1000 1000000
output:
0
result:
ok 1 number(s): "0"
Test #28:
score: 0
Accepted
time: 14ms
memory: 3804kb
input:
535164 619302
output:
721871396
result:
ok 1 number(s): "721871396"
Test #29:
score: 0
Accepted
time: 24ms
memory: 5352kb
input:
1000000 1000000
output:
580712335
result:
ok 1 number(s): "580712335"
Test #30:
score: 0
Accepted
time: 4ms
memory: 2348kb
input:
1000000 234534
output:
546630669
result:
ok 1 number(s): "546630669"
Test #31:
score: 0
Accepted
time: 10ms
memory: 5336kb
input:
234523 1000000
output:
127869098
result:
ok 1 number(s): "127869098"
Test #32:
score: 0
Accepted
time: 1ms
memory: 1500kb
input:
44722 10000
output:
0
result:
ok 1 number(s): "0"