Cod sursa(job #2916418)

Utilizator AndreiMargaritMargarit Andrei AndreiMargarit Data 29 iulie 2022 17:29:25
Problema BFS - Parcurgere in latime Scor 0
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 0.86 kb
#include <iostream>
#include <fstream>
#include <queue>

using namespace std;

ifstream f("bfs.in");
ofstream g("bfs.out");

int a[1001][1001],viz[1001],n,m,i,l,c,s,b,nr=1,nrad,nrad2;
queue <int>q;

void bfs()
{
    q.push(s);
    nrad=1;
    while(!q.empty())
    {
        b=q.front();
        for(i=1;i<=n;i++)
        {
            if(a[b][i]==1&&viz[i]==0)
            {
                q.push(i);
                viz[i]=nr+1;
                nrad2++;
            }
        }
        nrad--;
        if(nrad==0)
        {
            nr++;
            nrad=nrad2;
            nrad2=0;
        }
        q.pop();
    }
}

int main()
{
    f>>n>>m>>s;
    for(i=1;i<=m;i++)
    {
        f>>l>>c;
        a[l][c]=1;
    }
    viz[s]=1;
    bfs();
    for(i=1;i<=n;i++)
    {
        cout<<viz[i]-1<<" ";
    }
    return 0;
}