Pagini recente » Cod sursa (job #411680) | Cod sursa (job #342927) | Cod sursa (job #2299805) | Cod sursa (job #621881) | Cod sursa (job #718830)
Cod sursa(job #718830)
#include<stdio.h>
#include<vector>
#include<queue>
using namespace std;
vector<int> v[100001];
vector<int> t;
queue<int> q;
queue<int> w;
int n,m,s;
int ki;
int d;
int i;
int a,b;
int main()
{
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",&a,&b);
v[a].push_back(b);
}
t.assign(100001,-1);
t[s]=0;
q.push(s);
w.push(0);
while(!q.empty())
{
ki=q.front();d=w.front();
q.pop(); w.pop();
t[ki]=d;
vector<int>::iterator it;
for(it=v[ki].begin();it!=v[ki].end();++it)
{
if(t[*it]==-1)
{
q.push(*it);
w.push(d+1);
}
}
}
for(i=1;i<=n;i++)
{
printf("%d ",t[i]);
}
return 0;
}