Cod sursa(job #745371)
//Include
#include <fstream>
#include <vector>
#include <queue>
using namespace std;
//Definitii
#define pb push_back
//Constante
const int MAX_SIZE = (int)1e5+1;
//Variabile
ifstream in("bfs.in");
ofstream out("bfs.out");
int nodes, edges, startNode;
int dist[MAX_SIZE];
vector<int> graph[MAX_SIZE];
queue<int> q;
//Main
int main()
{
in >> nodes >> edges >> startNode;
int cFrom, cTo;
while(edges--)
{
in >> cFrom >> cTo;
graph[cFrom].pb(cTo);
}
q.push(startNode);
dist[startNode] = 1;
while(!q.empty())
{
int node = q.front();
q.pop();
vector<int>::iterator it=graph[node].begin(), end=graph[node].end();
for(; it!=end ; ++it)
if(!dist[*it])
{
dist[*it] = dist[node]+1;
q.push(*it);
}
}
for(int i=1 ; i<=nodes ; ++i)
out << dist[i]-1 << ' ';
in.close();
out.close();
return 0;
}