Cod sursa(job #2375889)

Utilizator Razvan85Secure Razvan Razvan85 Data 8 martie 2019 12:48:51
Problema BFS - Parcurgere in latime Scor 0
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 0.69 kb
#include <bits/stdc++.h>
using namespace std;
ifstream f("date.in");
ofstream g("date.out");
vector <int> v[1000];
queue <int> q;
int n,m,a,b,nr,viz[1000],s,nod,c[1000];
int main()
{
    f>>n>>m>>s;
    for(int i=1;i<=m;i++)
    {
        f>>a>>b;
        v[a].push_back(b);
    }
    q.push(s);
    while(!q.empty())
    {
        nod=q.front();
        q.pop();
        viz[nod]=1;
        for(int i=0;i<v[nod].size();i++)
            if(viz[v[nod][i]]==0)
              viz[v[nod][i]]=1,q.push(v[nod][i]),c[v[nod][i]]=c[nod]+1;
    }
    for(int i=1;i<=n;i++)
       if(c[i]==0)
          c[i]=-1;
    c[s]=0;
    for(int i=1;i<=n;i++)
        g<<c[i]<<" ";
    return 0;
}