Cod sursa(job #2867012)

Utilizator BogdanDuminicaDuminica Bogdan BogdanDuminica Data 10 martie 2022 09:58:57
Problema BFS - Parcurgere in latime Scor 100
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 0.82 kb
#include <fstream>
#include <bitset>
#include <queue>
#include <vector>
using namespace std;
ifstream fin("bfs.in");
ofstream fout("bfs.out");
int n,m,s,x,y,d[100002],i;
vector <int> Edge[100002];
queue <int> q;
void bfs()
{
    int val,vecin;
    q.push(s);
    while(!q.empty())
    {
        val=q.front();
        q.pop();
        for(int i=0;i<Edge[val].size();i++)
        {
            vecin=Edge[val][i];
            if(d[vecin]==-1)
            {
                q.push(vecin);
                d[vecin]=d[val]+1;
            }
        }
    }
}

int main()
{
    fin>>n>>m>>s;
    for(i=1;i<=m;i++)
    {
        fin>>x>>y;
        Edge[x].push_back(y);
    }
    for(i=1;i<=n;i++)
        d[i]=-1;
    d[s]=0;
    bfs();
    for(i=1;i<=n;i++)
        fout<<d[i]<<' ';
    return 0;
}