Cod sursa(job #2954386)

Utilizator TudosieRazvanTudosie Marius-Razvan TudosieRazvan Data 14 decembrie 2022 09:52:42
Problema BFS - Parcurgere in latime Scor 100
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 1.03 kb
#include <fstream>
#include <vector>
#include <algorithm>
#include <queue>
#include <climits>
#define NMAX 100003
using namespace std;

ifstream fin ("bfs.in");
ofstream fout ("bfs.out");

int n,m,start;
int dist[NMAX];
vector<int>graf[NMAX];


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

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

    queue<int>coada;
    coada.push(start);
    dist[start]=0;
    while(!coada.empty())
    {
        int nod=coada.front();
        coada.pop();
        for(int i=0; i<graf[nod].size(); i++)
        {
            int nd=graf[nod][i];
            if(dist[nod]+1<dist[nd])
            {
                dist[nd]=dist[nod]+1;
                coada.push(nd);
            }
        }
    }

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