QOJ.ac
QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#592168 | #8325. 重塑时光 | ucup-team1004 | 100 ✓ | 252ms | 8312kb | C++17 | 1.7kb | 2024-09-26 21:01:13 | 2024-09-26 21:01:13 |
Judging History
answer
#include<bits/stdc++.h>
using namespace std;
using ll=long long;
const int N=17,M=1<<15,mod=1e9+7;
int n,m,k,U,to[M];
ll qpow(ll x,ll y=mod-2,ll ans=1){
for(;y;(x*=x)%=mod,y>>=1)if(y&1)(ans*=x)%=mod;
return ans;
}
int f[M][N],g[M],h[M][N],C[N][N];
void calc(int *y,int *res){
static int f[N];
fill(res,res+1+n,0);
for(int i=0;i<=n;i++){
memset(f,0,sizeof f),f[0]=1;
int val=y[i];
for(int j=0;j<=n;j++)if(j^i){
for(int k=n;k>=0;k--){
f[k]=(1ll*f[k]*(mod-j)+(k?f[k-1]:0))%mod;
}
val=val*qpow((i-j+mod)%mod)%mod;
}
for(int j=0;j<=n;j++){
res[j]=(res[j]+1ll*val*f[j])%mod;
}
}
}
int main(){
cin>>n>>m>>k,U=(1<<n)-1;
for(int u,v;m--;){
cin>>u>>v,to[1<<u-1]|=1<<v-1;
}
for(int S=1;S<=U;S++){
to[S]=to[S^(S&-S)]|to[S&-S];
}
for(int i=0;i<=k+1;i++){
for(int j=C[i][0]=1;j<=i;j++){
C[i][j]=(C[i-1][j-1]+C[i-1][j])%mod;
}
}
g[0]=1;
for(int S=0;S<U;S++){
for(int i=0;i<n;i++)if(~S>>i&1){
if(to[1<<i]&S)continue;
g[S|1<<i]=(g[S|1<<i]+g[S])%mod;
}
}
for(int i=0;i<=n;i++)h[0][i]=mod-1;
for(int S=1;S<=U;S++){
for(int T=S;T;--T&=S)if(T&S&-S){
if((to[T]&(S^T))||(to[S^T]&T))continue;
for(int i=0;i<=n;i++){
h[S][i]=(h[S][i]+1ll*h[S^T][i]*g[T]%mod*(mod-i))%mod;
}
}
}
for(int i=0;i<=n;i++)f[0][i]=1;
for(int S=1;S<=U;S++){
for(int T=S;T;--T&=S){
if(to[T]&(S^T))continue;
for(int i=0;i<=n;i++)f[S][i]=(f[S][i]+1ll*f[S^T][i]*h[T][i])%mod;
}
}
static int res[N];
calc(f[U],res);
int ans=0;
for(int i=1,fac=1;i<=n;i++){
fac=1ll*fac*i%mod;
ans=(ans+1ll*res[i]*fac%mod*C[k+1][i])%mod;
}
int mul=1;
for(int i=1;i<=n;i++)mul=1ll*mul*(k+i)%mod;
ans=ans*qpow(mul)%mod;
cout<<ans<<endl;
return 0;
}
Details
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Pretests
Final Tests
Test #1:
score: 5
Accepted
time: 0ms
memory: 5764kb
input:
3 2 0 1 2 1 3
output:
333333336
result:
ok single line: '333333336'
Test #2:
score: 5
Accepted
time: 1ms
memory: 5692kb
input:
5 7 5 1 4 2 3 1 2 4 5 2 5 2 4 1 5
output:
895039689
result:
ok single line: '895039689'
Test #3:
score: 5
Accepted
time: 36ms
memory: 7872kb
input:
13 12 13 1 2 1 3 1 4 1 5 1 6 1 7 1 8 1 9 1 10 1 11 1 12 1 13
output:
76923078
result:
ok single line: '76923078'
Test #4:
score: 5
Accepted
time: 113ms
memory: 7940kb
input:
14 13 14 1 2 1 3 1 4 1 5 1 6 1 7 1 8 1 9 1 10 1 11 1 12 1 13 1 14
output:
535714290
result:
ok single line: '535714290'
Test #5:
score: 5
Accepted
time: 53ms
memory: 6944kb
input:
14 13 0 2 9 1 2 1 3 3 8 6 11 2 7 1 5 5 12 2 13 3 14 3 10 3 6 2 4
output:
700595243
result:
ok single line: '700595243'
Test #6:
score: 5
Accepted
time: 42ms
memory: 6904kb
input:
14 13 14 9 11 2 9 5 10 4 6 10 13 2 3 2 7 4 12 2 4 3 8 7 14 3 5 1 2
output:
465070080
result:
ok single line: '465070080'
Test #7:
score: 5
Accepted
time: 61ms
memory: 6276kb
input:
13 0 13
output:
1
result:
ok single line: '1'
Test #8:
score: 5
Accepted
time: 13ms
memory: 7160kb
input:
14 91 14 3 4 2 10 3 10 1 13 6 8 5 6 10 13 7 8 4 9 4 7 3 7 13 14 2 12 1 3 6 9 9 14 1 10 2 9 7 11 9 11 3 12 8 10 4 13 5 9 11 12 5 14 8 12 8 13 5 13 1 5 6 11 9 13 2 5 1 14 7 14 4 14 3 5 5 11 6 12 1 2 7 10 1 4 1 8 6 10 3 8 6 13 10 14 7 12 10 11 2 13 8 11 11 13 6 7 10 12 3 14 4 5 1 6 2 14 5 10 8 14 4 8 1...
output:
4362623
result:
ok single line: '4362623'
Test #9:
score: 5
Accepted
time: 1ms
memory: 7772kb
input:
9 15 9 1 2 3 5 2 8 4 8 1 4 2 5 2 7 4 5 1 9 6 8 6 9 1 3 3 7 5 9 5 8
output:
426526937
result:
ok single line: '426526937'
Test #10:
score: 5
Accepted
time: 1ms
memory: 5668kb
input:
9 14 9 1 2 1 3 1 4 1 5 1 6 1 7 1 8 1 9 4 5 6 8 4 7 6 7 3 8 4 6
output:
214820829
result:
ok single line: '214820829'
Test #11:
score: 5
Accepted
time: 6ms
memory: 6268kb
input:
13 68 0 1 2 1 3 1 4 1 5 1 6 1 7 1 8 1 9 1 10 1 11 1 12 1 13 2 5 2 6 2 7 2 8 2 9 2 10 2 11 2 12 2 13 3 4 3 5 3 6 3 7 3 8 3 9 3 10 3 11 3 12 3 13 4 5 4 6 4 7 4 8 4 9 4 10 4 11 4 12 4 13 5 6 5 7 5 8 5 9 5 10 5 11 5 12 5 13 6 7 6 8 6 9 6 10 6 11 6 12 6 13 7 8 7 10 7 11 7 12 7 13 8 13 9 10 9 11 9 12 9 13...
output:
65784302
result:
ok single line: '65784302'
Test #12:
score: 5
Accepted
time: 9ms
memory: 6264kb
input:
13 39 13 1 2 1 3 1 4 1 5 1 6 1 7 1 8 1 9 1 10 1 11 1 12 1 13 3 4 3 5 3 6 3 7 3 8 3 9 3 10 3 11 3 12 3 13 4 8 4 9 4 10 4 12 4 13 5 6 5 7 5 10 5 11 5 13 6 7 6 11 6 13 8 9 8 12 8 13 11 13
output:
361557272
result:
ok single line: '361557272'
Test #13:
score: 5
Accepted
time: 67ms
memory: 7100kb
input:
14 11 14 2 13 4 11 4 14 5 14 6 9 6 14 7 11 9 14 10 12 10 14 12 14
output:
696132576
result:
ok single line: '696132576'
Test #14:
score: 5
Accepted
time: 17ms
memory: 7080kb
input:
14 46 14 1 2 1 3 1 4 1 5 1 6 1 7 1 8 1 9 1 10 1 11 1 12 1 13 1 14 2 9 2 10 2 11 2 13 2 14 3 4 3 6 3 10 3 11 3 12 3 13 3 14 4 6 4 10 4 11 4 12 4 13 4 14 5 7 5 8 5 9 5 11 5 13 5 14 7 8 7 9 7 14 10 11 10 13 10 14 11 13 11 14 13 14
output:
258614192
result:
ok single line: '258614192'
Test #15:
score: 5
Accepted
time: 16ms
memory: 7096kb
input:
14 70 14 1 2 1 3 1 4 1 5 1 6 1 7 1 8 1 9 1 10 1 11 1 12 1 13 1 14 2 3 2 4 2 5 2 7 2 8 2 9 2 10 2 11 2 12 2 13 2 14 3 11 3 13 3 14 4 5 4 7 4 8 4 10 4 11 4 12 4 13 4 14 5 7 5 8 5 10 5 12 5 13 5 14 6 7 6 8 6 9 6 10 6 11 6 12 6 13 6 14 7 8 7 10 7 12 7 13 7 14 8 10 8 12 8 13 8 14 9 11 9 12 9 13 9 14 10 1...
output:
209616080
result:
ok single line: '209616080'
Test #16:
score: 5
Accepted
time: 15ms
memory: 6908kb
input:
14 69 14 1 4 1 5 1 6 1 7 1 8 1 9 1 10 1 11 1 12 1 13 1 14 2 3 2 5 2 6 2 7 2 9 2 10 2 11 2 12 2 13 2 14 3 5 3 6 3 7 3 9 3 10 3 11 3 12 3 13 3 14 4 7 4 8 4 9 4 10 4 11 4 12 4 13 4 14 5 6 5 7 5 9 5 10 5 11 5 12 5 13 5 14 6 7 6 9 6 10 6 11 6 12 6 13 6 14 7 9 7 10 7 11 7 12 7 13 7 14 8 12 8 13 8 14 9 10 ...
output:
701202127
result:
ok single line: '701202127'
Test #17:
score: 5
Accepted
time: 82ms
memory: 6856kb
input:
14 15 14 1 2 1 3 1 4 1 5 1 6 1 7 1 8 1 9 1 10 1 11 1 12 1 13 1 14 4 6 5 9
output:
263013541
result:
ok single line: '263013541'
Test #18:
score: 5
Accepted
time: 252ms
memory: 8244kb
input:
15 17 15 1 2 1 3 1 4 1 5 1 6 1 7 1 8 1 9 1 10 1 11 1 12 1 13 1 14 1 15 3 13 3 15 13 15
output:
963180835
result:
ok single line: '963180835'
Test #19:
score: 5
Accepted
time: 198ms
memory: 8304kb
input:
15 17 15 1 2 1 3 1 4 1 5 1 6 1 7 1 12 1 15 7 12 7 15 8 15 9 15 10 15 11 15 12 15 13 15 14 15
output:
722208430
result:
ok single line: '722208430'
Test #20:
score: 5
Accepted
time: 220ms
memory: 8312kb
input:
15 16 15 1 2 1 3 1 10 2 10 3 10 4 5 4 6 4 7 4 8 4 9 4 10 4 11 4 12 4 13 4 14 4 15
output:
560801339
result:
ok single line: '560801339'