Cod sursa(job #2035848)

Utilizator Tataru_AdelinTataru Adelin Tataru_Adelin Data 9 octombrie 2017 21:26:01
Problema BFS - Parcurgere in latime Scor 100
Compilator cpp Status done
Runda Arhiva educationala Marime 0.67 kb
#include <bits/stdc++.h>

using namespace std;
ifstream fin("bfs.in");
ofstream fout("bfs.out");

int main()
{
    int N,M,S,i,j;
    fin>>N>>M>>S;
    vector<int> dist(N+10);
    vector<vector<int>> v(N+10);
    queue<int> q;
    dist[S]=1;
    for(;M;M--)
    {
        fin>>i>>j;
        v[i].push_back(j);
    }
    q.push(S);
    while(!q.empty())
    {
        int now = q.front();
        q.pop();
        for(int i=0;i<v[now].size();i++)
        {
            if(!dist[v[now][i]])
            {
                q.push(v[now][i]);
                dist[v[now][i]]=dist[now]+1;
            }
        }

    }
    for(int i=1;i<=N;i++)
        fout<<dist[i]-1<<' ';
    return 0;
}