Pagini recente » Profil doruletz | Monitorul de evaluare | Profil Sabin1133 | Monitorul de evaluare | Cod sursa (job #3318473)
#include <fstream>
#include <vector>
#include <queue>
using namespace std;
ifstream fin("bfs.in");
ofstream fout("bfs.out");
int n,m,e;
vector<int>ma[100001];
int dist[100001];
queue<int>q;
void BFS()
{
while (!q.empty())
{
int nod_curent=q.front();
q.pop();
for (int i=0; i<ma[nod_curent].size(); i++)
{
int vecin=ma[nod_curent][i];
if (dist[vecin] == -1)
{
dist[vecin]=dist[nod_curent]+1;
q.push(vecin);
}
}
}
}
int main()
{
int x,y;
fin>>n>>m>>e;
for (int i=1; i<=m; i++)
{
fin>>x>>y;
ma[x].push_back(y);
}
for (int i=1; i<=n; i++)
{
dist[i]=-1;
}
q.push(e);
dist[e]=0;
BFS();
for (int i=1; i<=n; i++)
{
fout<<dist[i]<<" ";
}
fout << '\n';
return 0;
}