Pagini recente » Cod sursa (job #202798) | Cod sursa (job #2482121) | Cod sursa (job #1044710) | Borderou de evaluare (job #3096968) | Cod sursa (job #2476067)
#include <fstream>
#include <vector>
#include <queue>
#define NMAX 100005
using namespace std;
ifstream fin("bfs.in");
ofstream fout("bfs.out");
int N,M,S,D[NMAX],i,x,y;
queue <int> q;
vector <int> a[NMAX];
void BFS()
{
int nod_curent,vecin;
while(!q.empty())
{
nod_curent=q.front();
q.pop();
for(int i=0; i<a[nod_curent].size(); i++ )
{
vecin=a[nod_curent][i];
if(D[vecin]==-1)
{
D[vecin]=D[nod_curent]+1;
q.push(vecin);
}
}
}
}
int main()
{
fin>>N>>M>>S;
for(int i=1; i<=M; i++)
{
fin>>x>>y;
a[x].push_back(y);
}
for(int i=1; i<=N; i++)
{
D[i]=-1;
D[S]=0;
}
q.push(S);
BFS();
for(int i=1; i<=N; i++)
fout<<D[i]<<" ";
fout<<"\n";
fin.close();
fout.close();
return 0;
}