QOJ.ac
QOJ
| ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
|---|---|---|---|---|---|---|---|---|---|
| #148409 | #5749. Directed Vertex Cacti | le0n | AC ✓ | 13ms | 1896kb | C++14 | 573b | 2023-08-23 16:04:40 | 2023-08-23 20:22:04 |
Judging History
answer
#include <cstdio>
using namespace std;
typedef long long ll;
const int mod = 1e9 + 9;
int qpow(int x, int y)
{
int ans = 1;
while(y)
{
if(y & 1)
ans = (ll)ans * x % mod;
x = (ll)x * x % mod;
y >>= 1;
}
return ans;
}
int main()
{
int n, m, i, ans = 1;
scanf("%d%d", &n, &m);
for(i = 1; i <= m; i++)
ans = (ll)ans * i % mod;
ans = qpow(ans, mod - 2);
for(i = 0; i < m; i++)
ans = (ll)ans * (((ll)n * (n - 1) / 2 - i) % mod) % mod;
for(i = 1; i <= n; i++)
ans = (ll)ans * i % mod;
printf("%d\n", ans);
return 0;
}
Details
Tip: Click on the bar to expand more detailed information
Test #1:
score: 100
Accepted
time: 0ms
memory: 1844kb
input:
3 1
output:
18
result:
ok 1 number(s): "18"
Test #2:
score: 0
Accepted
time: 0ms
memory: 1768kb
input:
4 4
output:
360
result:
ok 1 number(s): "360"
Test #3:
score: 0
Accepted
time: 4ms
memory: 1700kb
input:
39847 348708
output:
983575456
result:
ok 1 number(s): "983575456"
Test #4:
score: 0
Accepted
time: 0ms
memory: 1764kb
input:
1 1
output:
0
result:
ok 1 number(s): "0"
Test #5:
score: 0
Accepted
time: 0ms
memory: 1536kb
input:
3 2
output:
18
result:
ok 1 number(s): "18"
Test #6:
score: 0
Accepted
time: 0ms
memory: 1896kb
input:
3 3
output:
6
result:
ok 1 number(s): "6"
Test #7:
score: 0
Accepted
time: 0ms
memory: 1604kb
input:
3 4
output:
0
result:
ok 1 number(s): "0"
Test #8:
score: 0
Accepted
time: 9ms
memory: 1764kb
input:
3 1000000
output:
0
result:
ok 1 number(s): "0"
Test #9:
score: 0
Accepted
time: 0ms
memory: 1768kb
input:
4 1
output:
144
result:
ok 1 number(s): "144"
Test #10:
score: 0
Accepted
time: 0ms
memory: 1764kb
input:
4 2
output:
360
result:
ok 1 number(s): "360"
Test #11:
score: 0
Accepted
time: 0ms
memory: 1580kb
input:
4 3
output:
480
result:
ok 1 number(s): "480"
Test #12:
score: 0
Accepted
time: 0ms
memory: 1700kb
input:
4 5
output:
144
result:
ok 1 number(s): "144"
Test #13:
score: 0
Accepted
time: 0ms
memory: 1616kb
input:
4 6
output:
24
result:
ok 1 number(s): "24"
Test #14:
score: 0
Accepted
time: 0ms
memory: 1652kb
input:
5 1
output:
1200
result:
ok 1 number(s): "1200"
Test #15:
score: 0
Accepted
time: 0ms
memory: 1760kb
input:
5 2
output:
5400
result:
ok 1 number(s): "5400"
Test #16:
score: 0
Accepted
time: 0ms
memory: 1760kb
input:
5 3
output:
14400
result:
ok 1 number(s): "14400"
Test #17:
score: 0
Accepted
time: 0ms
memory: 1620kb
input:
5 4
output:
25200
result:
ok 1 number(s): "25200"
Test #18:
score: 0
Accepted
time: 0ms
memory: 1648kb
input:
5 5
output:
30240
result:
ok 1 number(s): "30240"
Test #19:
score: 0
Accepted
time: 0ms
memory: 1536kb
input:
5 6
output:
25200
result:
ok 1 number(s): "25200"
Test #20:
score: 0
Accepted
time: 0ms
memory: 1756kb
input:
5 7
output:
14400
result:
ok 1 number(s): "14400"
Test #21:
score: 0
Accepted
time: 0ms
memory: 1592kb
input:
5 8
output:
5400
result:
ok 1 number(s): "5400"
Test #22:
score: 0
Accepted
time: 0ms
memory: 1756kb
input:
5 9
output:
1200
result:
ok 1 number(s): "1200"
Test #23:
score: 0
Accepted
time: 0ms
memory: 1764kb
input:
5 10
output:
120
result:
ok 1 number(s): "120"
Test #24:
score: 0
Accepted
time: 0ms
memory: 1616kb
input:
1000 1
output:
533396879
result:
ok 1 number(s): "533396879"
Test #25:
score: 0
Accepted
time: 0ms
memory: 1640kb
input:
1000 100
output:
199484478
result:
ok 1 number(s): "199484478"
Test #26:
score: 0
Accepted
time: 0ms
memory: 1608kb
input:
1000 10000
output:
656650652
result:
ok 1 number(s): "656650652"
Test #27:
score: 0
Accepted
time: 6ms
memory: 1524kb
input:
1000 1000000
output:
0
result:
ok 1 number(s): "0"
Test #28:
score: 0
Accepted
time: 8ms
memory: 1596kb
input:
535164 619302
output:
721871396
result:
ok 1 number(s): "721871396"
Test #29:
score: 0
Accepted
time: 13ms
memory: 1640kb
input:
1000000 1000000
output:
580712335
result:
ok 1 number(s): "580712335"
Test #30:
score: 0
Accepted
time: 7ms
memory: 1764kb
input:
1000000 234534
output:
546630669
result:
ok 1 number(s): "546630669"
Test #31:
score: 0
Accepted
time: 10ms
memory: 1764kb
input:
234523 1000000
output:
127869098
result:
ok 1 number(s): "127869098"
Test #32:
score: 0
Accepted
time: 1ms
memory: 1760kb
input:
44722 10000
output:
0
result:
ok 1 number(s): "0"