Pagini recente » Cod sursa (job #2588356) | Cod sursa (job #2558329) | Cod sursa (job #485108) | Cod sursa (job #2653439) | Cod sursa (job #2182622)
#include<fstream>
#include<vector>
#include<deque>
#define inf 100005
using namespace std;
ifstream f("bfs.in");
ofstream g("bfs.out");
int n,m,st,x,y;
vector<int>v[100005];
deque<int>q;
void bfs(int n, int d[], int start)
{
q.push_back(start);
d[start]=0;
while(!q.empty())
{
int nod=q.front();
q.pop_front();
for(int i=0;i<v[nod].size();i++)
if(d[v[nod][i]]==inf)
{
d[v[nod][i]]=d[nod]+1;
q.push_back(v[nod][i]);
}
}
}
int main()
{
int d[100005];
f>>n>>m>>st;
for(int i=1;i<=n;i++)
d[i]=inf;
while(m--)
{
f>>x>>y;
v[x].push_back(y);
}
bfs(n,d,st);
for(int i=1;i<=n;i++)
if(d[i]==inf)
g<<-1<<" ";
else
g<<d[i]<<" ";
return 0;
}