Cod sursa(job #2736900)

Utilizator AndreiD31Dragan Andrei AndreiD31 Data 4 aprilie 2021 10:18:10
Problema BFS - Parcurgere in latime Scor 100
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 0.71 kb
#include <bits/stdc++.h>

using namespace std;

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

vector<int>v[100100];
queue<int>q;
int n,i,m,s,x,nod,vecin,y,viz[100100];

int main()
{
    f>>n>>m>>s;
    for(i=1;i<=m;i++)
    {
        f>>x>>y;
        v[x].push_back(y);
    }

    for(i=1;i<=n;i++)viz[i]=-1;

    q.push(s);
    viz[s]=0;
    while(!q.empty())
    {
        nod=q.front();
        q.pop();
        for(i=0;i<v[nod].size();i++)
        {
            vecin=v[nod][i];
            if(viz[vecin]==-1)
            {
                viz[vecin]=viz[nod]+1;
                q.push(vecin);
            }
        }
    }

    for(i=1;i<=n;i++)g<<viz[i]<<" ";
    return 0;
}