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- #include <iostream>
- #include <fstream>
- #define inf 1000000
- using namespace std;
- //ifstream f("lungimerandmax.in");
- //ofstream g("lungimerandmax.out");
- const int NMax=105;
- int n, m, k, matrice[NMax][NMax];
- int distanta[NMax];
- bool vizitat[NMax];
- void citire()
- {
- cin>>n>>m>>k;
- int a, b;
- for(int i=1; i<n; i++)
- for(int j=i+1; j<=n; j++)
- matrice[i][j]=matrice[j][i]=inf;
- for(int i=1; i<=m; i++)
- {
- cin>>a>>b;
- matrice[a][b]=1;
- }
- }
- void Dijkstra()
- {
- vizitat[k]=true;
- for(int i=1; i<=n; i++)
- distanta[i]=matrice[1][i];
- for(int i=1; i<=n; i++)
- {
- int minim=inf;
- int poz;
- for(int j=1; j<=n; j++)
- if(vizitat[j]==false)
- if(distanta[j]<minim)
- {
- minim=distanta[j];
- poz=j;
- }
- vizitat[poz]=true;
- for(int j=1; j<=n; j++)
- if(distanta[poz]+matrice[poz][j]<distanta[j])
- distanta[j]=distanta[poz]+matrice[poz][j];
- }
- }
- void afisare()
- {
- int ok=0;
- for(int i=1; i<=n; i++)
- if(distanta[i]==k)
- {
- cout<<i<<" ";
- ok=1;
- }
- if(ok==0)
- cout<<"Nu exista";
- }
- int main()
- {
- citire();
- Dijkstra();
- afisare();
- return 0;
- }
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