Pagini recente » Cod sursa (job #2803902) | Cod sursa (job #213296) | Cod sursa (job #302179) | Cod sursa (job #1013501) | Cod sursa (job #1043685)
#include <fstream>
int n, m, s, c[100000], vis[100000], p, u, v, x, y, k[100000];
struct nod
{
int info;
nod *urm;
} *lista[100000], *aux, *point;
using namespace std;
int main()
{
ifstream in("bfs.in");
ofstream out("bfs.out");
in>>n>>m>>s;
for(int i=1; i<=m; i++)
{
in>>x>>y;
aux=new nod;
aux->info=y;
aux->urm=lista[x];
lista[x]=aux;
}
c[1]=s;
vis[s]=1;
p=u=1;
for(int i=1; i<=n; i++) k[i]=-1;
k[s]=0;
while(p<=u)
{
v=c[p]; p++;
for(int i=1; i<=n; i++)
if(vis[i]==0)
{
int ok=0;
aux=lista[v];
point=aux;
while(!ok && point!=0)
{
if(point->info==i)ok=1;
else point=point->urm;
}
if(ok)
{
u++;
c[u]=i;
vis[i]=1;
k[i]=k[v]+1;
}
}
}
for(int i=1; i<=n; i++) out<<k[i]<<" ";
return 0;
}