Cod sursa(job #2808566)

Utilizator star1star21Stefan Birca star1star21 Data 25 noiembrie 2021 11:56:16
Problema BFS - Parcurgere in latime Scor 20
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 0.85 kb
#include <bits/stdc++.h>
#include <fstream>
#include <iostream>
using namespace std;
ifstream fin("bfs.in");
ofstream fout("bfs.out");
std::vector <int> edges[100001];
std::queue <int> q;
bool milaivizitat[100001];
int cost[100001];
int main()
{
    int n,m,s,a,b;
    fin>>n>>m>>s;
    for(int i=1;i<=m;i++)
    {
        fin>>a>>b;
        edges[a].push_back(b);
    }
    for(int i=1;i<=n;i++)
    {
        cost[i]=-1;
    }
    cost[s]=0;
    q.push(s);
    while(!q.empty())
    {
        int nod=q.front();
        milaivizitat[nod]=true;
        q.pop();
        for(auto i:edges[nod])
        {
            if(!milaivizitat[i])
            {
               cost[i]=cost[nod]+1;
               q.push(i);
            }
        }
    }
    for(int i=1;i<=n;i++)
    {
        fout<<cost[i]<<" ";
    }
    return 0;
}