Cod sursa(job #2168182)

Utilizator RazvanGutaGuta Razvan Alexandru RazvanGuta Data 14 martie 2018 09:54:23
Problema BFS - Parcurgere in latime Scor 100
Compilator cpp Status done
Runda Arhiva educationala Marime 0.67 kb
#include<bits/stdc++.h>
using namespace std;
ifstream f("bfs.in");
ofstream g("bfs.out");
int n,m,s,x,y,d[100001],i;
vector <int> G[100001];
queue <int> q;
void bfs(int nod)
{
    q.push(nod);
    while(!q.empty())
    {
        x=q.front();
         q.pop();
        for(int i=0;i<G[x].size();i++)
        {
            if(!d[G[x][i]])
            {
                d[G[x][i]]=d[x]+1;
                q.push(G[x][i]);
            }
        }

    }
}
int main()
{
    f>>n>>m>>s;
    for(i=1;i<=m;i++)
    {
        f>>x>>y;
        G[x].push_back(y);
    }
    d[s]=1;
    bfs(s);
    for(i=1;i<=n;i++)
        g<<d[i]-1<<" ";
    return 0;
}