Cod sursa(job #3318473)

Utilizator eddy.cimpanuCimpanu Eduardo Daniel eddy.cimpanu Data 28 octombrie 2025 12:50:08
Problema BFS - Parcurgere in latime Scor 100
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 0.92 kb
#include <fstream>
#include <vector>
#include <queue>
using namespace std;
ifstream fin("bfs.in");
ofstream fout("bfs.out");
int n,m,e;
vector<int>ma[100001];
int dist[100001];
queue<int>q;
void BFS()
{
    while (!q.empty())
    {
        int nod_curent=q.front();
        q.pop();
        for (int i=0; i<ma[nod_curent].size(); i++)
        {
            int vecin=ma[nod_curent][i];
            if (dist[vecin] == -1)
            {
                dist[vecin]=dist[nod_curent]+1;
                q.push(vecin);
            }
        }
    }
}

int main()
{
    int x,y;
    fin>>n>>m>>e;
    for (int i=1; i<=m; i++)
    {
        fin>>x>>y;
        ma[x].push_back(y);
    }

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

    q.push(e);
    dist[e]=0;

    BFS();

    for (int i=1; i<=n; i++)
    {
        fout<<dist[i]<<" ";
    }
    fout << '\n';
    return 0;
}