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Cod sursa(job #800008)
#include<cstdio>
#include<cstring>
#include<vector>
#include<queue>
using namespace std;
int n,m,viz[100001];
vector <int> l[100001];
void bfs(int u)
{
int c;vector<int>::iterator it;
queue <int> q;
for(int i=1;i<=n;++i)
viz[i]=-1;
q.push(u);
viz[u]=0;
while(!q.empty())
{
c=q.front();
for(it=l[c].begin();it!=l[c].end();++it)
if(viz[*it]==-1)
{
q.push(*it);
viz[*it]=viz[c]+1;
}
q.pop();
}
}
int main()
{
freopen("bfs.in","r",stdin);
freopen("bfs.out","w",stdout);
int i,u,v,s;
scanf("%d%d%d",&n,&m,&s);
for(i=1;i<=m;++i)
{
scanf("%d%d",&u,&v);
l[u].push_back(v);
}
bfs(s);
for(i=1;i<=n;++i)
printf("%d ",viz[i]);
printf("\n");
return 0;
}