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QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#208579 | #5749. Directed Vertex Cacti | xia_mc | AC ✓ | 261ms | 236024kb | C++14 | 838b | 2023-10-09 19:03:30 | 2023-10-09 19:03:31 |
Judging History
answer
#include<stdio.h>
#define int long long
const int N=3e7+5,mod=1e9+9;
int ksm(int x,int y){
int s=1;
while(y){
if(y&1) (s*=x%mod)%=mod;
(x*=x%mod)%=mod;y>>=1;
}
return s;
}
int fac[N];
int fact(int x){
if(x<=3e7) return fac[x];
int s=fac[(int)3e7];
for(int i=3e7+1;i<=x;i++) (s*=i%mod)%=mod;
return s;
}
int inv(int x){return ksm(x,mod-2);}
void init(){fac[0]=1;for(int i=1;i<=3e7;i++) fac[i]=fac[i-1]*i%mod;}
int C(int n,int m){
int s=1;
for(int i=1;i<=m;i++) (s*=(n-m+i)*inv(i)%mod)%=mod;
return s;
// return fact(n)*inv(fact(n-m))%mod*(inv(fact(m)))%mod;
}
int lucas(int n,int m){
if(m==0) return 1;
return C(n%mod,m%mod)%mod*lucas(n/mod,m/mod)%mod;
}
int n,m;
signed main(){
init();
scanf("%lld%lld",&n,&m);
printf("%lld\n",fact(n)*lucas(lucas(n,2),m)%mod);
return 0;
}
Details
Tip: Click on the bar to expand more detailed information
Test #1:
score: 100
Accepted
time: 140ms
memory: 235984kb
input:
3 1
output:
18
result:
ok 1 number(s): "18"
Test #2:
score: 0
Accepted
time: 127ms
memory: 236024kb
input:
4 4
output:
360
result:
ok 1 number(s): "360"
Test #3:
score: 0
Accepted
time: 180ms
memory: 235900kb
input:
39847 348708
output:
983575456
result:
ok 1 number(s): "983575456"
Test #4:
score: 0
Accepted
time: 128ms
memory: 235904kb
input:
1 1
output:
0
result:
ok 1 number(s): "0"
Test #5:
score: 0
Accepted
time: 123ms
memory: 236008kb
input:
3 2
output:
18
result:
ok 1 number(s): "18"
Test #6:
score: 0
Accepted
time: 133ms
memory: 235916kb
input:
3 3
output:
6
result:
ok 1 number(s): "6"
Test #7:
score: 0
Accepted
time: 118ms
memory: 235976kb
input:
3 4
output:
0
result:
ok 1 number(s): "0"
Test #8:
score: 0
Accepted
time: 242ms
memory: 235980kb
input:
3 1000000
output:
0
result:
ok 1 number(s): "0"
Test #9:
score: 0
Accepted
time: 135ms
memory: 235988kb
input:
4 1
output:
144
result:
ok 1 number(s): "144"
Test #10:
score: 0
Accepted
time: 117ms
memory: 235996kb
input:
4 2
output:
360
result:
ok 1 number(s): "360"
Test #11:
score: 0
Accepted
time: 130ms
memory: 236012kb
input:
4 3
output:
480
result:
ok 1 number(s): "480"
Test #12:
score: 0
Accepted
time: 156ms
memory: 235960kb
input:
4 5
output:
144
result:
ok 1 number(s): "144"
Test #13:
score: 0
Accepted
time: 128ms
memory: 236008kb
input:
4 6
output:
24
result:
ok 1 number(s): "24"
Test #14:
score: 0
Accepted
time: 128ms
memory: 236016kb
input:
5 1
output:
1200
result:
ok 1 number(s): "1200"
Test #15:
score: 0
Accepted
time: 128ms
memory: 235904kb
input:
5 2
output:
5400
result:
ok 1 number(s): "5400"
Test #16:
score: 0
Accepted
time: 124ms
memory: 235952kb
input:
5 3
output:
14400
result:
ok 1 number(s): "14400"
Test #17:
score: 0
Accepted
time: 124ms
memory: 235976kb
input:
5 4
output:
25200
result:
ok 1 number(s): "25200"
Test #18:
score: 0
Accepted
time: 114ms
memory: 235996kb
input:
5 5
output:
30240
result:
ok 1 number(s): "30240"
Test #19:
score: 0
Accepted
time: 122ms
memory: 235912kb
input:
5 6
output:
25200
result:
ok 1 number(s): "25200"
Test #20:
score: 0
Accepted
time: 124ms
memory: 235912kb
input:
5 7
output:
14400
result:
ok 1 number(s): "14400"
Test #21:
score: 0
Accepted
time: 120ms
memory: 235964kb
input:
5 8
output:
5400
result:
ok 1 number(s): "5400"
Test #22:
score: 0
Accepted
time: 133ms
memory: 235944kb
input:
5 9
output:
1200
result:
ok 1 number(s): "1200"
Test #23:
score: 0
Accepted
time: 138ms
memory: 235968kb
input:
5 10
output:
120
result:
ok 1 number(s): "120"
Test #24:
score: 0
Accepted
time: 124ms
memory: 235996kb
input:
1000 1
output:
533396879
result:
ok 1 number(s): "533396879"
Test #25:
score: 0
Accepted
time: 108ms
memory: 235968kb
input:
1000 100
output:
199484478
result:
ok 1 number(s): "199484478"
Test #26:
score: 0
Accepted
time: 114ms
memory: 235912kb
input:
1000 10000
output:
656650652
result:
ok 1 number(s): "656650652"
Test #27:
score: 0
Accepted
time: 249ms
memory: 236004kb
input:
1000 1000000
output:
0
result:
ok 1 number(s): "0"
Test #28:
score: 0
Accepted
time: 214ms
memory: 235908kb
input:
535164 619302
output:
721871396
result:
ok 1 number(s): "721871396"
Test #29:
score: 0
Accepted
time: 234ms
memory: 236008kb
input:
1000000 1000000
output:
580712335
result:
ok 1 number(s): "580712335"
Test #30:
score: 0
Accepted
time: 151ms
memory: 235980kb
input:
1000000 234534
output:
546630669
result:
ok 1 number(s): "546630669"
Test #31:
score: 0
Accepted
time: 261ms
memory: 235908kb
input:
234523 1000000
output:
127869098
result:
ok 1 number(s): "127869098"
Test #32:
score: 0
Accepted
time: 127ms
memory: 235976kb
input:
44722 10000
output:
0
result:
ok 1 number(s): "0"