Cod sursa(job #2488996)

Utilizator Codrin2004Codrin George Nichifor Codrin2004 Data 7 noiembrie 2019 21:02:40
Problema BFS - Parcurgere in latime Scor 100
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 0.7 kb
#include <fstream>
#include <vector>
#include <queue>

using namespace std;
ifstream fin("bfs.in");
ofstream fout("bfs.out");
vector <int> v[100001];
int nod,viz[100001];
int n,m,i,s,x,y;
queue <int> q;
int main()
{
    fin>>n>>m>>s;
    for(i=1;i<=m;i++)
    {
        fin>>x>>y;
        v[x].push_back(y);
    }
    viz[s]=1;
    q.push(s);
    while(!q.empty())
    {
        nod=q.front();
        q.pop();
        for(i=0;i<v[nod].size();i++)
        {
            if(viz[v[nod][i]]==0)
            {
                viz[v[nod][i]]=viz[nod]+1;
                q.push(v[nod][i]);
            }
        }
    }
    for(i=1;i<=n;i++)
        fout<<viz[i]-1<<' ';
    return 0;
}