Pagini recente » Cod sursa (job #1205541) | Statistici Suto Tamas (suto.tamas96) | Cod sursa (job #1388178) | Cod sursa (job #3308511) | Cod sursa (job #3312056)
#include <fstream>
#include <vector>
#include <queue>
using namespace std;
ifstream be("bfs.in");
ofstream ki("bfs.out");
void bfs(const vector<vector<int>> &adj, const int start, vector<int> &eredmeny)
{
int count = 0;
eredmeny[start] = count;
vector<bool> visited(adj.size());
queue<int> q;
visited[start] = 1;
q.push(start);
while(!q.empty())
{
int current = q.front();
q.pop();
bool tovabb = 0;
for(int i : adj[current])
{
if(!visited[i])
{
eredmeny[i] = count + 1;
visited[i] = 1;
q.push(i);
tovabb = 1;
}
}
if(tovabb)
{
count++;
}
}
}
int main()
{
int n, m, s;
be >> n >> m >> s;
vector<vector<int>> adj(n + 1);
int x, y;
for(int i = 0; i < m; i++)
{
be >> x >> y;
adj[x].push_back(y);
}
vector<int> eredmeny(n + 1, -1);
bfs(adj, s, eredmeny);
for(int i = 1; i <= n; i++)
{
ki << eredmeny[i] << " ";
}
return 0;
}