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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 |
|---|---|---|---|---|---|---|---|---|---|
| #108108 | #5749. Directed Vertex Cacti | Fanch100 | AC ✓ | 305ms | 159880kb | C++14 | 689b | 2023-05-23 16:28:46 | 2023-05-23 16:29:08 |
Judging History
answer
#include<bits/stdc++.h>
using namespace std;
using ll = long long;
const int N = 10000010;
int n, m, mod;
ll qpow(ll a,ll b){
ll res=1;
for (; b; b>>=1){
if (b&1) res=res*a%mod;
a=a*a%mod;
}
return res;
}
ll pro[N], inv[N];
void init(){
pro[0]=1;
for (int i=1;i<N;++i) pro[i]=pro[i-1]*i%mod;
inv[N-1]=qpow(pro[N-1],mod-2);
for (int i=N-1;i>=1;--i) inv[i-1]=inv[i]*i%mod;
}
int main(){
cin>>n>>m;
mod=1e9+9;
init();
ll ans=pro[n];
ll tot=1ll*n*(n-1)/2%mod;
for (int i=1;i<=m;++i){
ans=ans*tot%mod; tot--;
}
ans=ans*inv[m]%mod;
printf("%lld\n",ans);
return 0;
}
详细
Test #1:
score: 100
Accepted
time: 274ms
memory: 159876kb
input:
3 1
output:
18
result:
ok 1 number(s): "18"
Test #2:
score: 0
Accepted
time: 282ms
memory: 159724kb
input:
4 4
output:
360
result:
ok 1 number(s): "360"
Test #3:
score: 0
Accepted
time: 277ms
memory: 159760kb
input:
39847 348708
output:
983575456
result:
ok 1 number(s): "983575456"
Test #4:
score: 0
Accepted
time: 305ms
memory: 159620kb
input:
1 1
output:
0
result:
ok 1 number(s): "0"
Test #5:
score: 0
Accepted
time: 284ms
memory: 159644kb
input:
3 2
output:
18
result:
ok 1 number(s): "18"
Test #6:
score: 0
Accepted
time: 269ms
memory: 159712kb
input:
3 3
output:
6
result:
ok 1 number(s): "6"
Test #7:
score: 0
Accepted
time: 267ms
memory: 159632kb
input:
3 4
output:
0
result:
ok 1 number(s): "0"
Test #8:
score: 0
Accepted
time: 252ms
memory: 159776kb
input:
3 1000000
output:
0
result:
ok 1 number(s): "0"
Test #9:
score: 0
Accepted
time: 262ms
memory: 159644kb
input:
4 1
output:
144
result:
ok 1 number(s): "144"
Test #10:
score: 0
Accepted
time: 257ms
memory: 159672kb
input:
4 2
output:
360
result:
ok 1 number(s): "360"
Test #11:
score: 0
Accepted
time: 256ms
memory: 159632kb
input:
4 3
output:
480
result:
ok 1 number(s): "480"
Test #12:
score: 0
Accepted
time: 257ms
memory: 159712kb
input:
4 5
output:
144
result:
ok 1 number(s): "144"
Test #13:
score: 0
Accepted
time: 261ms
memory: 159716kb
input:
4 6
output:
24
result:
ok 1 number(s): "24"
Test #14:
score: 0
Accepted
time: 281ms
memory: 159792kb
input:
5 1
output:
1200
result:
ok 1 number(s): "1200"
Test #15:
score: 0
Accepted
time: 262ms
memory: 159680kb
input:
5 2
output:
5400
result:
ok 1 number(s): "5400"
Test #16:
score: 0
Accepted
time: 298ms
memory: 159636kb
input:
5 3
output:
14400
result:
ok 1 number(s): "14400"
Test #17:
score: 0
Accepted
time: 256ms
memory: 159592kb
input:
5 4
output:
25200
result:
ok 1 number(s): "25200"
Test #18:
score: 0
Accepted
time: 273ms
memory: 159880kb
input:
5 5
output:
30240
result:
ok 1 number(s): "30240"
Test #19:
score: 0
Accepted
time: 240ms
memory: 159724kb
input:
5 6
output:
25200
result:
ok 1 number(s): "25200"
Test #20:
score: 0
Accepted
time: 285ms
memory: 159784kb
input:
5 7
output:
14400
result:
ok 1 number(s): "14400"
Test #21:
score: 0
Accepted
time: 253ms
memory: 159712kb
input:
5 8
output:
5400
result:
ok 1 number(s): "5400"
Test #22:
score: 0
Accepted
time: 257ms
memory: 159792kb
input:
5 9
output:
1200
result:
ok 1 number(s): "1200"
Test #23:
score: 0
Accepted
time: 285ms
memory: 159636kb
input:
5 10
output:
120
result:
ok 1 number(s): "120"
Test #24:
score: 0
Accepted
time: 305ms
memory: 159648kb
input:
1000 1
output:
533396879
result:
ok 1 number(s): "533396879"
Test #25:
score: 0
Accepted
time: 249ms
memory: 159640kb
input:
1000 100
output:
199484478
result:
ok 1 number(s): "199484478"
Test #26:
score: 0
Accepted
time: 289ms
memory: 159644kb
input:
1000 10000
output:
656650652
result:
ok 1 number(s): "656650652"
Test #27:
score: 0
Accepted
time: 286ms
memory: 159760kb
input:
1000 1000000
output:
0
result:
ok 1 number(s): "0"
Test #28:
score: 0
Accepted
time: 286ms
memory: 159876kb
input:
535164 619302
output:
721871396
result:
ok 1 number(s): "721871396"
Test #29:
score: 0
Accepted
time: 294ms
memory: 159784kb
input:
1000000 1000000
output:
580712335
result:
ok 1 number(s): "580712335"
Test #30:
score: 0
Accepted
time: 269ms
memory: 159624kb
input:
1000000 234534
output:
546630669
result:
ok 1 number(s): "546630669"
Test #31:
score: 0
Accepted
time: 278ms
memory: 159712kb
input:
234523 1000000
output:
127869098
result:
ok 1 number(s): "127869098"
Test #32:
score: 0
Accepted
time: 289ms
memory: 159788kb
input:
44722 10000
output:
0
result:
ok 1 number(s): "0"