Cod sursa(job #2704911)

Utilizator madalina.andronAndronache Madalina madalina.andron Data 11 februarie 2021 16:42:30
Problema BFS - Parcurgere in latime Scor 30
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 0.94 kb
#include <iostream>
#include <fstream>
#include <vector>
#include <queue>
#include <algorithm>
using namespace std;
ifstream f("bfs.in");
ofstream g("bfs.out");
int n,m,S,nod,x,y;
int T[110], Lg[110];
bool sel[110];
vector <int> G[110];
queue <int> Q;
void bfs(int nod)
{
    Q.push(nod);
    sel[nod]=true;
    T[nod]=Lg[nod]=0;
   // g<<nod<<' ';
    while(!Q.empty())
    {
        int x=Q.front();
        for(auto it:G[x])if(!sel[it])
        {
         Q.push(it);
         sel[it]=true;
         T[it]=x;
         Lg[it]=Lg[x]+1;
  //       g<<it<<' ';
        }
        Q.pop();
    }
}
int main()
{
    f>>n>>m>>S;
    for(int i=1; i<=m; i++)
    {
        f>>x>>y;
        G[x].push_back(y);
       // G[y].push_back(x);
    }
    for(int i=1;i<=n;i++)
       sort(G[i].begin(),G[i].end());
    bfs(S);
    for(int i=1;i<=n;i++) if(Lg[i]==0&& i!=S) g<<-1<<' ';
    else g<<Lg[i]<<' ';
    return 0;
}