Cod sursa(job #2809481)

Utilizator Casian_doispeChiriac Casian Casian_doispe Data 27 noiembrie 2021 09:35:18
Problema BFS - Parcurgere in latime Scor 100
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 0.87 kb
#include <fstream>
#include <vector>
#include <algorithm>
#include <deque>

#define MOD 4001

using namespace std;

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

vector<int> m[100009] ;

int d[100009] ;

void lee(int nod)
{
    deque<int> dq ;

    dq.push_back(nod) ;

    d[nod] = 1 ;

    while(dq.size())
    {
        int nod = dq.front() ;

        dq.pop_front() ;

        for(int f = 0 ; f < m[nod].size() ; f ++)
            if(!d[m[nod][f]] || (d[nod] + 1 < d[m[nod][f]]))
                d[m[nod][f]] = d[nod] + 1, dq.push_back(m[nod][f]) ;
    }
}

int main()
{
    int n, q, s ;

    cin >> n >> q >> s ;

    while(q --)
    {
        int a, b ;

        cin >> a >> b ;

        m[a].push_back(b) ;
    }

    lee(s) ;

    for(int f = 1 ; f <= n ; f ++)
        cout << d[f] - 1 << " " ;

    return 0 ;
}