Pagini recente » Cod sursa (job #424387) | Cod sursa (job #1784666) | Cod sursa (job #1946559) | Cod sursa (job #2806898) | Cod sursa (job #2230927)
#include <fstream>
#include <vector>
#define NMAX 100005
#include <queue>
using namespace std;
vector <int> v[NMAX];
queue <int>q;
int n,m,s,x,y;
int dist[NMAX];
void bfs()
{ int nod,lung;
while(!q.empty())
{
nod=q.front();
q.pop();
lung=v[nod].size();
for(int i=0;i<lung;i++)
{
if(dist[v[nod][i]]==-1)
{
dist[v[nod][i]]=dist[nod]+1;
q.push(v[nod][i]);
}
}
}
}
int main()
{
ifstream cin("bfs.in");
ofstream cout("bfs.out");
cin>>n>>m>>s;
for(int i=1;i<=n;i++)
{
dist[i]=-1;
}
for(int i=1;i<=m;i++)
{
cin>>x>>y;
v[x].push_back(y);
}
q.push(s);
dist[s]=0;
bfs();
for(int i=1;i<=n;i++)
{
cout<<dist[i]<<" ";
}
return 0;
}