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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 |
---|---|---|---|---|---|---|---|---|---|
#330762 | #7514. Clique Challenge | Williamxzh | WA | 1ms | 5984kb | C++14 | 1.8kb | 2024-02-17 18:47:53 | 2024-02-17 18:47:53 |
Judging History
answer
#include <bits/stdc++.h>
#define il inline
using namespace std;
typedef long long ll;
const ll mod=1e9+7;
const int N=1005,M=24;
bool c1[1<<M],c2[1<<M];int b[1<<M],s[1<<M];
il ll solve(int n,bool a[N][N]){
if(n==1) return 1ll;
if(n==2) return 2ll+1ll*a[1][2];
int m=(n+1)/2;int S=(1<<m),T=(1<<(n-m)),x,y,z,u,v,w;ll ans=0ll;
for(int i=0;i<S;++i) b[i]=0;
for(int i=0;i<T;++i) s[i]=0;
c1[0]=1;
for(int i=1;i<S;++i){
x=(i&-i),y=int(log2(x));
if(!c1[i-x]){c1[i]=0;continue;}
c1[i]=1;
for(int j=0;j<m;++j) if((((i-x)>>j)&1) && !a[y+1][j+1]) {c1[i]=0;break;}
}
c2[0]=1;
for(int i=1;i<T;++i){
x=(i&-i),y=int(log2(x));
if(!c2[i-x]){c2[i]=0;continue;}
c2[i]=1;
for(int j=0;j<n-m;++j) if((((i-x)>>j)&1) && !a[y+1+m][j+1+m]) {c2[i]=0;break;}
if(c2[i]){
++s[i];
for(int j=0;j<n-m;++j)
if(!((i>>j)&1)) s[i|(1<<j)]+=s[i];
}
}
b[0]=T-1;
for(int i=1;i<S;++i){
x=(i&-i),y=int(log2(x)),z=0;
for(int j=0;j<n-m;++j) if(a[y+1][j+1+m]) z|=(1<<j);
b[i]=b[i-x]&z,ans+=1ll*s[b[i]];
}
return ans%mod;
}
int n,m,in[N],a[N];ll ans;bool g[N][N];
bitset<N> e[N];
vector<int> f;
int x,y;
int main(){
scanf("%d%d",&n,&m);
for(int i=1;i<=m;++i) scanf("%d%d",&x,&y),++in[x],++in[y],e[x][y]=e[y][x]=1;
for(int i=1;i<=n;++i) a[i]=i;
sort(a+1,a+1+n,[](int x,int y){return in[x]<in[y];});
for(int i=1;i<=n;++i){
f.clear();f.push_back(a[i]);
for(int j=i+1;j<=n;++j)
if(e[a[i]][a[j]]) f.push_back(a[j]);
x=f.size();
for(int i=1;i<=x;++i)
for(int j=i+1;j<=x;++j)
g[i][j]=g[j][i]=e[f[i-1]][f[j-1]];
ans+=solve(x,g);
}
printf("%lld",ans%mod);
return 0;
}
详细
Test #1:
score: 0
Wrong Answer
time: 1ms
memory: 5984kb
input:
3 2 1 2 2 3
output:
7
result:
wrong answer 1st lines differ - expected: '5', found: '7'