QOJ.ac
QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#368124 | #8325. 重塑时光 | JohnAlfnov | 30 | 5ms | 4564kb | C++20 | 2.3kb | 2024-03-26 20:54:57 | 2024-03-26 20:54:58 |
Judging History
answer
#include<bits/stdc++.h>
#define mod 1000000007
using namespace std;
int powdv(int x,int y=mod-2){
int ans=1;
while(y){
if(y&1)ans=1ll*ans*x%mod;
y>>=1,x=1ll*x*x%mod;
}
return ans;
}
int n,m,k;
int u[155],v[155];
int z1[1<<15],ct[1<<15];
bitset<25>mp[25];
bitset<125>b1[1<<15],b2[1<<15];
int gl[25],C[35][35];
int di[25];
vector<vector<int>>vc;
vector<int>vv;
void dfs(int S,int gs){
if(!gs){
if(!S)vc.emplace_back(vv);
return;
}
for(int T=S;T;T=(T-1)&S){
if(ct[T]==ct[S]){
vv.emplace_back(T);
dfs(S^T,gs-1);
vv.pop_back();
}
}
}
int mb[1<<15];
int dp[1<<15],f[1<<15],z2[1<<15];
vector<int>g[25];
int deg[25];
int main(){
scanf("%d%d%d",&n,&m,&k);
for(int i=0;i<=2*n+1;++i){
C[i][0]=1;
for(int j=1;j<=i;++j){
C[i][j]=(C[i-1][j]+C[i-1][j-1])%mod;
}
}
di[0]=1;
for(int i=1;i<=n;++i)di[i]=1ll*i*di[i-1]%mod;
int pd=powdv(C[n+k][n]);
for(int i=0;i<n&&i<=k;++i){
gl[i]=1ll*1*C[k+1][i+1]%mod*pd%mod;
}
for(int i=1;i<=m;++i){
scanf("%d%d",&u[i],&v[i]);
mp[u[i]][v[i]]=1;
}
for(int i=1;i<(1<<n);++i){
for(int j=1;j<=m;++j){
int A=(i>>(u[j]-1))&1,B=(i>>(v[j]-1))&1;
if(A)b1[i][j]=1,mb[i]|=1<<(v[j]-1);
if(B)b2[i][j]=1;
}
}
z1[0]=1;
for(int i=0;i<(1<<n);++i)for(int j=1;j<=n;++j){
if(i&(1<<(j-1)))continue;
int fl=1;
for(int k=1;k<=n;++k)if(mp[k][j]&&((i>>(k-1))&1))fl=0;
if(fl)z1[i^(1<<(j-1))]=(z1[i^(1<<(j-1))]+z1[i])%mod;
}
for(int i=0;i<(1<<n);++i)ct[i]=__builtin_ctz(i);
int ans=0;
for(int i=0;i<n&&i<=k;++i){
vc.clear();vv.clear();
dfs((1<<n)-1,i+1);
for(auto cv:vc){
for(int j=1;j<=i+1;++j)g[j].clear(),deg[j]=0;
for(int j=1;j<=i+1;++j)for(int k=1;k<=i+1;++k){
if(j!=k&&(mb[cv[j-1]]&cv[k-1]))g[j].emplace_back(k),++deg[k];
}
queue<int>q;
for(int j=1;j<=i+1;++j)if(!deg[j]){
q.emplace(j);
}
int fl=0;
while(q.size()){
int x=q.front();q.pop();
++fl;
for(auto cu:g[x]){
--deg[cu];
if(!deg[cu])q.emplace(cu);
}
}
if(fl<i+1)continue;
int cj=di[i+1];
for(int j=1;j<=i+1;++j)cj=1ll*cj*z1[cv[j-1]];
ans=(ans+1ll*gl[i]*cj)%mod;
}
}
int nj=1;
for(int i=1;i<=n;++i)nj=1ll*nj*i%mod;
ans=1ll*ans*powdv(nj)%mod;
ans=(ans+mod)%mod;
printf("%d\n",ans);
return 0;
}
Details
Tip: Click on the bar to expand more detailed information
Test #1:
score: 5
Accepted
time: 1ms
memory: 3816kb
input:
3 2 0 1 2 1 3
output:
333333336
result:
ok single line: '333333336'
Test #2:
score: 5
Accepted
time: 0ms
memory: 3844kb
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: 0
Time Limit Exceeded
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:
result:
Test #4:
score: 0
Time Limit Exceeded
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:
result:
Test #5:
score: 5
Accepted
time: 5ms
memory: 4564kb
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: 0
Time Limit Exceeded
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:
result:
Test #7:
score: 0
Time Limit Exceeded
input:
13 0 13
output:
result:
Test #8:
score: 0
Time Limit Exceeded
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:
result:
Test #9:
score: 5
Accepted
time: 5ms
memory: 4060kb
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: 5ms
memory: 4064kb
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: 4ms
memory: 4456kb
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: 0
Time Limit Exceeded
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:
result:
Test #13:
score: 0
Time Limit Exceeded
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:
result:
Test #14:
score: 0
Time Limit Exceeded
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:
result:
Test #15:
score: 0
Time Limit Exceeded
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:
result:
Test #16:
score: 0
Time Limit Exceeded
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:
result:
Test #17:
score: 0
Time Limit Exceeded
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:
result:
Test #18:
score: 0
Time Limit Exceeded
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:
result:
Test #19:
score: 0
Time Limit Exceeded
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:
result:
Test #20:
score: 0
Time Limit Exceeded
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