Cod sursa(job #2670288)

Utilizator BalasaRaduBalasa Radu BalasaRadu Data 9 noiembrie 2020 16:37:15
Problema BFS - Parcurgere in latime Scor 0
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 0.84 kb
#include <bits/stdc++.h>
using namespace std;//BFS
vector <int> v[100009];
queue <int> q;
int ans[100009];
bool vizitat[100009];
int n,m,s;
void bfs()
{
    q.push(s);
    while(!q.empty())
    {
        int nod=q.front();
        for(int i=0;i<v[nod].size();i++)
            if(vizitat[v[nod][i]]==0&&v[nod][i]!=s)
            {
                vizitat[v[nod][i]]=1;
                ans[v[nod][i]]=ans[nod]+1;
                q.push(v[nod][i]);
            }
        q.pop();
    }
}
int main()
{
    cin>>n>>m>>s;
    for(int i=1;i<=m;i++)
    {
        int x,y;
        cin>>x>>y;
        v[x].push_back(y);
    }
    bfs();
    for(int i=1;i<=n;i++)
        if(i==s)
            cout<<0<<' ';
        else
            if(ans[i])
                cout<<ans[i]<<' ';
            else
                cout<<-1<<' ';
}