Pagini recente » Cod sursa (job #798610) | Cod sursa (job #909441) | Cod sursa (job #2737188) | Cod sursa (job #2876653) | Cod sursa (job #3145603)
#include <bits/stdc++.h>
using namespace std;
ifstream f("bfs.in");
ofstream g("bfs.out");
int n,m ,s;
vector < int > v[100005];
queue <int> q;
int afis[100005];
void bfs ( int x)
{
q.push(x);
while(!q.empty())
{
int nod=q.front();
q.pop();
for(int i=0;i<v[nod].size();i++)
if(afis[v[nod][i]]==0)
{
q.push(v[nod][i]);
afis[v[nod][i]]=afis[nod]+1;
}
}
}
int main()
{f>>n>>m>>s;
for(int i=1;i<=m;i++)
{
int x,y;
f>>x>>y;
v[x].push_back(y);
}
afis[s]=1;
bfs(s);
for(int i=1;i<=n;i++)
if(afis[i]==1 && i!=s)
g<<-1<<' ';
else g<<afis[i]-1<<' ';
return 0;
}