Cod sursa(job #2923739)

Utilizator raulboancaBoanca Raul Alin raulboanca Data 18 septembrie 2022 15:13:32
Problema BFS - Parcurgere in latime Scor 100
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 0.81 kb
#include <bits/stdc++.h>

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