Cod sursa(job #3333834)

Utilizator tudor_pavalPaval Tudor Mihai tudor_paval Data 15 ianuarie 2026 10:33:41
Problema BFS - Parcurgere in latime Scor 0
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 0.9 kb
#include <fstream>
#define NMAX 100001
using namespace std;
ifstream fin ("bfs.in");
ofstream fout ("bfs.out");
int n,nrc,start;
int a[NMAX];
void citire();
void afisare();
void bfs(int x);
int viz[NMAX];
int C[NMAX];
int inc,sf;
int main()
{
    int i;
    citire();
   bfs(start);
   for(i=1 ; i<=n ; i++) fout<<viz[i]-1<<' ';
    return 0;
}
void citire()
{
    int i,m,x,y;
    fin>>n>>m>>start;
    for(i=0 ; i<m ; i++)
    {
        fin>>x>>y;
        a[x].push_back(y);
    }
}
void afisare()
{

}
void bfs(int x)
{
    int i;
    C[0]=x; inc=sf=0;  //initializez coada cu varful de start
    //vizitez varful de start
    while (inc<=sf)
    {
        x=C[inc++];
        //parcurg vecinii lui x
        for(i=0; i<=a[x].size(); i++)
            if(viz[a[x][i]]==0)
        {
            viz[a[x][i]]=1+viz[x];;
            C[++sf]=i=a[x][i];
        }
    }
}