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Cod sursa(job #501236)
#include<cstdio>
#include<vector>
#include<deque>
using namespace std;
deque<int> Q;
vector<int> V[100010];
int n,m,s,i,x,y,viz[100010];
void bfs(),read();
int main()
{
read();
bfs();
return 0;
}
void read()
{
freopen("bfs.in","r",stdin);
freopen("bfs.out","w",stdout);
scanf("%d%d%d",&n,&m,&s);
for(i=1;i<=m;i++)
scanf("%d%d",&x,&y),V[x].push_back(y);
}
void bfs()
{
vector<int>::iterator it;
int d;
Q.push_back(s);viz[s]=1;
while(Q.size())
{
x = Q.front();d = viz[x]+1;
for(it=V[x].begin();it!=V[x].end();it++)
if(!viz[*it])
{
viz[*it]=d;
Q.push_back(*it);
}
Q.pop_front();
}
for(i=1;i<=n;i++)
printf("%d ",viz[i]-1);
}