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- #include <iostream>
- #include <fstream>
- using namespace std;
- fstream f("matrice.txt");
- int a[20][20],n,suc[100],prec[100],x,y,z;
- void citire()
- {f>>n;
- for(int i=1;i<=n;i++)
- {f>>x>>y;
- a[x][y]=1;
- }
- }
- void succ(int nod)
- {suc[nod]=x;
- for(int k=1;k<=n;k++)
- if(a[nod][k]==1&&suc[k]==0)
- succ(k);}
- void predec(int nod)
- {prec[nod]=x;
- for(int k=1;k<=n;k++)
- if(a[k][nod]==1&&prec[k]==0)
- predec(k);
- }
- void afisare()
- {for(int i=1;i<=n;i++)
- {for(int j=1;j<=n;j++)
- cout<<a[i][j]<<" ";
- cout<<endl;
- }
- }
- int main()
- {citire();
- afisare();
- cin>>x;
- succ(x);
- cout<<endl<<"succesorii lui "<<x<<endl;
- for(int i=1;i<=n;i++)
- {
- if(suc[i]!=0)
- cout<<i<<" ";}
- cout<<endl;
- predec(x);
- cout<<endl<<"Predecesorii lui "<<x<<endl;
- for(int i=1;i<=n;i++)
- {if(prec[i]!=0)
- cout<<i<<" ";}
- cout<<endl;
- cout<<endl<<"componenta tare conexa in care se gaseste "<<x<<" este"<<endl;
- for(int i=1;i<=n;i++)
- if(prec[i]==suc[i]&&suc[i]!=0)
- cout<<i<<" ";
- cout<<endl;
- return 0;
- }
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