Cod sursa(job #2342522)

Utilizator SamySam2099Irsai Samuel SamySam2099 Data 12 februarie 2019 21:24:52
Problema BFS - Parcurgere in latime Scor 20
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 0.71 kb
#include <iostream>
#include <fstream>
#include <vector>
using namespace std;
ifstream f("bfs.in");
ofstream g("bfs.out");
#define Nmax 100005
vector <int> G[Nmax];

int n,m,c,s;
int D[Nmax];
void read()
{
   f>>n>>m>>s;
   for(int i=1;i<=m;i++)
   {
       int x,y;
       f>>x>>y;
       G[x].push_back(y);
   }
   for(int i=1;i<=n;i++)
      D[i]=-1;
   D[s]=0;
}
void dfs(int nod)
{
    for(int i=0;i<G[nod].size();i++)
    {
        int vecin=G[nod][i];
        if(D[vecin]==-1)
           {
               D[vecin]=D[nod]+1;
               dfs(vecin);
           }
    }
}
int main()
{
    read();
    dfs(s);
    for(int i=1;i<=n;i++)
        g<<D[i]<<' ';
    return 0;
}