Cod sursa(job #2527118)

Utilizator GabiRRacianu Marian Gabriel GabiR Data 19 ianuarie 2020 17:33:45
Problema BFS - Parcurgere in latime Scor 100
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 0.88 kb
#include <iostream>
#include <fstream>
#include <vector>
#include <queue>
using namespace std;
ifstream f("bfs.in");
ofstream g("bfs.out");
const int NLIM=100005;
int n,m,s,d[NLIM];
vector<int>G[NLIM];
queue<int>q;
void bf()
{
    int nod,next;
    while(!q.empty())
    {
        nod=q.front();
        q.pop();
        for(int i=0;i<G[nod].size();i++)
            {

                next=G[nod][i];
                if(d[next]==-1)
                {
                    q.push(next);
                    d[next]=d[nod]+1;
                }
            }
    }
}
int main()
{
    f>>n>>m>>s;
    for(int i=1;i<=m;i++)
        {
            int x,y;
            f>>x>>y;
            G[x].push_back(y);
        }
    for(int i=1;i<=n;i++)
        d[i]=-1;
    d[s]=0;
    q.push(s);
    bf();
    for(int i=1;i<=n;i++)
        g<<d[i]<<' ';
    return 0;
}