Cod sursa(job #2295186)

Utilizator alexandruilieAlex Ilie alexandruilie Data 3 decembrie 2018 12:23:50
Problema BFS - Parcurgere in latime Scor 20
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 0.71 kb
#include <fstream>
#include <iostream>
#include <queue>
#include <vector>

using namespace std;
ifstream f("bfs.in");
ofstream g("bfs.out");
vector <int> v[100005];
queue <int> q;
int n,m,s,x,y,d[100005],viz[100005];
void dfs(int nod)
{
    int i;
    for(i=0; i<v[nod].size(); i++)
    {
        if(!viz[v[nod][i]])
        {
            d[v[nod][i]]=d[nod]+1;
            viz[v[nod][i]]=1;
            dfs(v[nod][i]);
        }
    }
}

int main()
{
    int i;
    f>>n>>m>>s;

    for(i=1; i<=m; i++)
    {
        f>>x>>y;
        v[x].push_back(y);
    }
    for(i=1; i<=n; i++) d[i]=-1;
    d[s]=0;
    viz[s]=1;
    dfs(s);
    for(i=1; i<=n; i++) g<<d[i]<<' ';
    return 0;
}