Pagini recente » Cod sursa (job #1922426) | Cod sursa (job #1757453) | Cod sursa (job #1816851) | Rating Bildea Ovidiu (han12132) | Cod sursa (job #3145835)
#include <iostream>
#include <vector>
#include <queue>
// numarul de componente conexe
using namespace std;
const int NMAX = 1e5 + 2;
vector<int> adj[NMAX];
bool viz[NMAX];
int dist[NMAX];
void bfs(int source)
{
queue <int> q;
q.push(source);
dist[source]=0;
viz[source]=1;
while(!q.empty())
{
int nod=q.front();
q.pop();
for(auto& to:adj[nod])
{
if(!viz[to])
q.push(to), dist[to]=dist[nod]+1;
}
}
}
int main()
{
int s;
freopen("bfs.in", "r", stdin);
freopen("bfs.out", "w", stdout);
int n , m; cin >> n >> m>>s;
int i;
for (int i = 1; i <= m; i++)
{
int x, y; cin >> x >> y;
adj[x].push_back(y);
//adj[y].push_back(x); fiindca e orientat
}
for(i=1;i<=n;++i)
dist[i]=-1;
bfs(s);
for(int nod=1;nod<=n;++n)
cout<<dist[nod]<<' ';
}