Pagini recente » Cod sursa (job #3184518) | Statistici Roatis Carmen Maria (charmed) | Cod sursa (job #2236397) | Cod sursa (job #2687798) | Cod sursa (job #471109)
Cod sursa(job #471109)
#include<vector>
#include<fstream>
#include<queue>
using namespace std;
const int MaxN=100005;
vector <int> v[MaxN];
ifstream fin ("bfs.in");
ofstream fout ("bfs.out");
int s,n,m,i,x,y,viz[MaxN],k;
queue<int> q;
void bfs(int nod, int k){
viz[nod]=k;
q.push(nod);
while(!q.empty()){
nod=q.front();
q.pop();
for(i=0;i<v[nod].size();++i){
if(!viz[v[nod][i]]){
viz[v[nod][i]]=viz[nod]+1;
q.push(v[nod][i]);
}
}
}
}
void dfs(int nod)
{
if(!viz[nod]){
viz[nod]=k;
for(int i=0;i<v[nod].size();++i)
{
if(!viz[v[nod][i]])
{
dfs(v[nod][i]);
}
}
}
}
int main()
{
fin>>n>>m>>s;
for(i=1;i<=m;i++){
fin>>x>>y;
v[x].push_back(y);
//v[y].push_back(x);
}
bfs(s,1);
/*
k=0;
for(register int i=1;i<=n;++i)
{
if(!viz[i]){
k++;
dfs(i);
}
}
*/
//fout<<k;
for(i=1;i<=n;++i){
fout<<viz[i]-1<<" ";
}
fin.close();
fout.close();
return 0;
}