Pagini recente » Cod sursa (job #2918260) | Cod sursa (job #2291299) | Cod sursa (job #533688) | Cod sursa (job #1052014) | Cod sursa (job #1046761)
#include <iostream>
#include <fstream>
#include <vector>
#include <queue>
std::ifstream fin("bfs.in");
std::ofstream fout("bfs.out");
std::vector<int> noduri[100002];
int n, m, s;
int visited[100002];
void citire()
{
fin>>n>>m>>s;
int a, b;
for(int i = 0; i < m; i++)
{
fin>>a>>b;
if(a != b)
{
noduri[a].push_back(b);
visited[a] = -1;
visited[b] = -1;
}
}
}
void bfs(int nod)
{
std::queue<int> indici;
indici.push(nod);
visited[nod] = 0;
// std::cout<<nod<<' ';
int nr = 1;
while(indici.size())
{
for(int i = 0; i < noduri[indici.front()].size(); i++)
{
if(visited[noduri[indici.front()][i]] == -1)
{
// std::cout<<noduri[indici.front()][i]<<' ';
indici.push(noduri[indici.front()][i]);
visited[noduri[indici.front()][i]] = visited[indici.front()] + 1;///nr;
}
}
indici.pop();
// nr++;
}
for(int i = 0; i < n; i++)
{
fout<<visited[i+1]<<' ';
}
}
int main()
{
citire();
bfs(s);
return 0;
}