Pagini recente » Cod sursa (job #3360963) | Cod sursa (job #2137645) | Cod sursa (job #3360966) | Cod sursa (job #3360957) | Cod sursa (job #3360981)
#include <fstream>
#include <bits/stdc++.h>
using namespace std;
ifstream fin("bfs.in");
ofstream fout("bfs.out");
int n, m, s, x, y, dist[100005], i;
vector <int> v[100005];
bool viz[100005];
void bfs(int nod)
{
viz[nod]=1;
queue<int>q;
q.push(nod);
while(!q.empty())
{
int x=q.front();
q.pop();
for(auto i: v[x])
if(viz[i]==0)
{
viz[i]=1;
dist[i]=dist[x]+1;
q.push(i);
}
}
}
int main()
{
fin>>n>>m>>s;
for(i=1; i<=m; i++)
{
fin>>x>>y;
v[x].push_back(y);
}
bfs(s);
for(i=1; i<=n; i++)
if(viz[i]==0)
fout<<-1<<" ";
else
fout<<dist[i]<<" ";
return 0;
}