Cod sursa(job #2487692)

Utilizator VladAdrianaVlad Adriana VladAdriana Data 5 noiembrie 2019 17:59:51
Problema BFS - Parcurgere in latime Scor 100
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 0.68 kb
#include <fstream>
#include <vector>
#define pb push_back

using namespace std;
ifstream fin("bfs.in");
ofstream fout("bfs.out");
int n,m,x,y,s,q[100005],uz[100005],st,dr,aux;
vector <int> L[100005];

int main()
{
    int i;
    fin>>n>>m>>s;
    for(i=1;i<=m;i++)
    {
        fin>>x>>y;
        if(x!=y)
            L[x].pb(y);
    }
    dr=uz[s]=1;
    q[++st]=s;
    while(st<=dr)
    {
        aux=q[st++];
        for(i=0;i<L[aux].size();i++)
            if(!uz[L[aux][i]])
            {
                q[++dr]=L[aux][i];
                uz[L[aux][i]]=uz[aux]+1;
            }
    }
    for(i=1;i<=n;i++)
        fout<<uz[i]-1<<' ';
    return 0;
}