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QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#697249 | #5089. 环覆盖 | DaiRuiChen007 | 0 | 0ms | 0kb | C++17 | 1.0kb | 2024-11-01 12:26:59 | 2024-11-01 12:27:02 |
answer
#include<bits/stdc++.h>
#define ll long long
#define pc(x) __builtin_popcount(x)
using namespace std;
const int MOD=1e9+7,i2=(MOD+1)/2;
int n,m,e[30];
ll cnt[305],ans[305],g[305],C[305][305];
char f[1<<25];
signed main() {
freopen("even.in","r",stdin);
freopen("even.out","w",stdout);
scanf("%d%d",&n,&m);
for(int i=0;i<=m;++i) for(int j=C[i][0]=1;j<=i;++j) C[i][j]=(C[i-1][j]+C[i-1][j-1])%MOD;
for(int i=0,u,v;i<m;++i) {
scanf("%d%d",&u,&v),--u,--v;
e[u]|=1<<v,e[v]|=1<<u;
}
for(int i=0;i<n;++i) {
for(int s=0;s<(1<<i);++s) {
f[s|1<<i]=f[s]+pc(e[i])-2*pc(e[i]&s);
}
}
for(int s=0;s<(1<<n);++s) ++cnt[f[s]];
for(int i=0;i<=m;++i) g[i]=C[m][i];
for(int i=0;i<=m;++i) {
for(int j=0;j<=m;++j) {
ans[j]=(ans[j]+g[j]*cnt[i])%MOD;
}
for(int j=1;j<=m;++j) g[j]=(g[j]+MOD-g[j-1])%MOD;
for(int j=m;j>=1;--j) g[j]=(g[j]+MOD-g[j-1])%MOD;
}
ll inv=1;
for(int i=1;i<=n;++i) inv=inv*i2%MOD;
for(int i=0;i<=m;++i) printf("%lld ",ans[i]*inv%MOD); puts("");
return 0;
}
Details
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Subtask #1:
score: 0
Dangerous Syscalls
Test #1:
score: 0
Dangerous Syscalls
input:
10 9 3 5 3 10 4 7 4 8 5 6 5 9 6 9 7 9 9 10
output:
result:
Subtask #2:
score: 0
Skipped
Dependency #1:
0%
Subtask #3:
score: 0
Dangerous Syscalls
Test #31:
score: 0
Dangerous Syscalls
input:
25 45 1 6 1 12 1 17 2 3 2 4 2 6 3 6 3 8 4 5 4 12 4 16 5 17 6 21 7 14 7 22 7 23 8 15 8 19 8 24 9 11 9 19 9 23 9 25 10 17 10 18 11 16 11 19 11 22 12 19 13 18 14 19 15 19 16 24 17 19 17 22 17 25 18 19 18 21 18 24 19 23 20 22 21 25 22 23 23 25 24 25
output:
result:
Subtask #4:
score: 0
Skipped
Dependency #2:
0%
Subtask #5:
score: 0
Skipped
Dependency #4:
0%