Cod sursa(job #2764895)

Utilizator ana_madalina_18Radu Ana Madalina ana_madalina_18 Data 23 iulie 2021 10:54:01
Problema BFS - Parcurgere in latime Scor 100
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 0.8 kb
#include <fstream>
#include <vector>
#include <queue>
using namespace std;
vector <int> g[100009];
queue <int> q;
int dist[100009];
void bfs(int s)
{
    dist[s]=1;
    q.push(s);
    while(!q.empty())
    {
        int curent=q.front();
        for(int i=0;i<g[curent].size();i++)
        {
            if(dist[g[curent][i]]==0)
            {
                dist[g[curent][i]]=dist[curent]+1;
                q.push(g[curent][i]);
            }
        }
        q.pop();
    }
}
int main()
{
    ifstream fin("bfs.in");
    ofstream fout("bfs.out");
    int n,m,s;
    fin>>n>>m>>s;
    int x,y;
    for(int i=1;i<=m;i++)
    {
        fin>>x>>y;
        g[x].push_back(y);
    }
    bfs(s);
    for(int i=1;i<=n;i++)
    {
        fout<<dist[i]-1<<' ';
    }
    return 0;
}