Pagini recente » Cod sursa (job #1762831) | Cod sursa (job #1536048) | Cod sursa (job #2425481) | Autentificare | Cod sursa (job #1269664)
#include<cstdio>
#include<queue>
#include<vector>
#define NMAX 100001
using namespace std;
vector<int> G[NMAX];
bool viz[NMAX];
int dist[NMAX];
int n,m,s;
void citeste_graf()
{
int a1,a2;
scanf("%d%d%d",&n,&m,&s);
for(int i=1; i<=m; ++i)
{
scanf("%d%d",&a1,&a2);
G[a1].push_back(a2);
}
}
void bfs()
{
int nod;
queue<int> coada;
coada.push(s);
viz[s]=true;
while(!coada.empty())
{
nod=coada.front();
for(int i=0; i<G[nod].size(); ++i)
{
if(!viz[G[nod][i]])
{
coada.push(G[nod][i]);
dist[G[nod][i]]=dist[nod]+1;
viz[G[nod][i]]=true;
}
} //inchide for
coada.pop();
}
}
int main()
{
freopen("bfs.in","r",stdin);
freopen("bfs.out","w",stdout);
citeste_graf();
bfs();
for(int i =1 ; i<=n; ++i)
if(viz[i]==true)
printf("%d ",dist[i]);
else printf("-1 ");
}