Cod sursa(job #2571398)

Utilizator andaraluca2001Anda Epure andaraluca2001 Data 4 martie 2020 22:50:34
Problema BFS - Parcurgere in latime Scor 100
Compilator cpp-64 Status done
Runda r3capitusulare Marime 0.77 kb
#include <bits/stdc++.h>
using namespace std;
const int MAX=100002;
vector<int>graf[MAX];
queue<int>q;
int n,m,start,st,dr,d[MAX];
ifstream in("bfs.in");
ofstream out("bfs.out");

void bfs(int nod)
{
    d[nod]=1;
    q.push(nod);
    while(!q.empty())
    {
        int acc=q.front();
        q.pop();
        for(int i=0;i<graf[acc].size();i++)
        {
            int cur=graf[acc][i];
            if(d[cur]==0)
            {
                d[cur]=1+d[acc];
                q.push(cur);
            }
        }
    }
}
int main()
{
    in>>n>>m>>start;
    for(int i=1;i<=m;i++)
    {
        in>>st>>dr;
        graf[st].push_back(dr);
    }

    bfs(start);

    for(int i=1;i<=n;i++)
    {
        out<<d[i]-1<<" ";
    }
    return 0;
}