Cod sursa(job #2678354)

Utilizator Danut200333Dumitru Daniel Danut200333 Data 28 noiembrie 2020 12:06:32
Problema Parcurgere DFS - componente conexe Scor 0
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 0.82 kb
#include <fstream>
#include <queue>
#include <cstring>

using namespace std;
ifstream fin("bfs.in");
ofstream fout("bfs.out");
queue <int> q;
int viz[100001],d[100001],n,i,m,s,x,y;
vector <int> v[100005];
void bfs(int s)
{
    int i,j,nod;
    q.push(s);
    memset(d,-1,sizeof(d));
    d[s]=0;
    viz[s]=1;
    while(!q.empty())
    {
        nod=q.front();
        q.pop();
        for(i=0; i<v[nod].size(); i++)
        {
            if(!viz[v[nod][i]])
            {
                q.push(v[nod][i]);
                d[v[nod][i]]=d[nod]+1;
                viz[v[nod][i]]=1;
            }
        }
    }
}
int main()
{
    fin>>n>>m>>s;
    for(i=1; i<=m; i++)
    {
        fin>>x>>y;
        v[x].push_back(y);
    }
    bfs(s);
    for(i=1; i<=n; i++)fout<<d[i]<<" ";
    return 0;
}