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- #include <fstream>
- using namespace std;
- ifstream f ("bipartit1.in");
- ofstream g ("bipartit1.out");
- int n,m, w[20][20],a[20],st[20],v[20];
- void citire()
- {
- f>>n>>m;
- int x,y;
- for(int i=1;i<=m;i++)
- {
- f>>x>>y;
- w[x][y]=w[y][x]=1;
- }
- }
- bool valid (int k)
- {
- if(st[k]<=st[k-1])
- return 0;
- return 1;
- }
- bool partitie(int k)
- {
- int s=1;
- for(int i=1;i<=n;i++)
- if(st[s]==i)
- v[i]=1,s++;
- else
- v[i]=2;
- for(int i=1;i<=n;i++)
- for(int j=1;j<=n;j++)
- {
- if(v[i]==v[j] && w[i][j]==1)
- return 0;
- }
- return 1;
- }
- void genpar(int k)
- {
- for(int i=1;i<=n;i++)
- {
- st[k]=i;
- if(valid(k))
- {
- if(k<=n/2)
- {
- if(k==n/2)
- {if(partitie(k))
- {
- g<<"DA"<<endl;
- if(v[1]==1)
- {
- for(int i=1;i<=k;i++)
- if(v[i]==1)
- g<<i<<" ";
- g<<endl;
- for(int i=1;i<=k;i++)
- if(v[i]==2)
- g<<i<<" ";
- }
- else
- {
- for(int i=1;i<=k;i++)
- if(v[i]==2)
- g<<i<<" ";
- g<<endl;
- for(int i=1;i<=k;i++)
- if(v[i]==1)
- g<<i<<" ";
- }
- }
- }
- else
- genpar(k+1);
- }
- }
- }
- }
- int main()
- {
- citire();
- genpar(1);
- return 0;
- }
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