Cod sursa(job #2789155)

Utilizator AndreeaCreitaCreita Andreea AndreeaCreita Data 26 octombrie 2021 22:48:12
Problema BFS - Parcurgere in latime Scor 100
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 0.99 kb
#include <bits/stdc++.h>
#include <fstream>
using namespace std;
int n, m, s;    //s e nod initial, v e nodul curent, primul din coada
bool vizitat[100005];
int dist[100005];
vector <int>l[100005];
queue <int>q;


ifstream in("bfs.in");
ofstream out("bfs.out");
void citire()
{
    in>>n>>m>>s;
    int x,y,i;
    for(int i =0; i<m; i++)
    {
        in>>x>>y;
        l[x].push_back(y);
    }
}

void bfs(int s)
{
    int v,i,y;
    q.push(s);
    vizitat[s] = 1;
    dist[s]=0;
    while(!q.empty())
    {
        v=q.front();
        for(auto el:l[v])
        {

            if(vizitat[el]==0)
            {
                q.push(el);
                vizitat[el]=1;
                dist[el]=dist[v]+1;

            }
        }
        q.pop();
    }
}


int main()
{
    citire();
    for(int i =1; i<=n; i++)
    {
        dist[i]=-1;
    }
    bfs(s);

    for(int i = 1; i<=n; i++)
    {

        out << dist[i]<<' ';
    }
    return 0;
}