Pagini recente » Cod sursa (job #203703) | Cod sursa (job #2553654) | Cod sursa (job #2119911) | Cod sursa (job #1875030) | Cod sursa (job #2111343)
#include <bits/stdc++.h>
using namespace std;
ifstream f("bfs.in");
ofstream g("bfs.out");
#define nmax 100003
int n,m,x,y,start;
int viz[nmax];
vector < int > v[nmax];
queue < int > coada;
void BFS(int nod)
{
coada.push(nod);
viz[nod]=0;
while(!coada.empty())
{
nod=coada.front();
coada.pop();
for(vector < int > ::iterator it=v[nod].begin();it!=v[nod].end();it++)
if(viz[*it]==-1)
{
viz[*it]=viz[nod]+1;
coada.push(*it);
}
}
}
int main()
{
f>>n>>m>>start;
for(int i=1; i<=m; i++)
{
f>>x>>y;
v[x].push_back(y);
}
for(int i=1;i<=n;i++)
viz[i]=-1;
BFS(start);
for(int i=1;i<=n;i++)
g<<viz[i]<<" ";
return 0;
}