Cod sursa(job #3365914)

Utilizator lambrulescu@outlook.comMatei Lambrulescu [email protected] Data 27 septembrie 2026 19:12:59
Problema BFS - Parcurgere in latime Scor 100
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 0.81 kb
#include <fstream>
#include <vector>
#include <queue>

using namespace std;

ifstream cin("bfs.in");
ofstream cout("bfs.out");

queue<int> q;
int d[100001];
vector<int> v[100001];

void bfs(int ns,int n)
{
    int i;
    for(i=1;i<=n;i++)
        d[i]=-1;
    d[ns]=0;
    q.push(ns);
    while(q.empty()==false)
    {
        int x=q.front();
        q.pop();
        for(i=0;i<v[x].size();i++)
        {
            int y=v[x][i];
            if(d[y]==-1)
            {
                d[y]=d[x]+1;
                q.push(y);
            }
        }
    }
}

int main()
{
    int n,m,s,i;
    cin>>n>>m>>s;
    for(i=1;i<=m;i++)
    {
        int x,y;
        cin>>x>>y;
        v[x].push_back(y);
    }
    bfs(s,n);
    for(i=1;i<=n;i++)
        cout<<d[i]<<" ";
    return 0;
}