Pagini recente » Borderou de evaluare (job #2023900) | Cod sursa (job #3234875) | Cod sursa (job #2861923) | Borderou de evaluare (job #2217967) | Cod sursa (job #3245781)
#include <fstream>
#include <vector>
#include <queue>
using namespace std;
ifstream fin ("bfs.in");
ofstream fout ("bfs.out");
#define NMAX 100008
int n,i,j,m,s,a,b;
vector<int>muchii[NMAX];
int cost[NMAX];
void bfs (int startnode);
int main()
{
fin>>n>>m>>s;
for (i=1; i<=m; i++)
{
fin>>a>>b;
muchii[a].push_back(b);
}
bfs(s);
for (i=1; i<=n; i++)
{
fout<<cost[i]-1<<' ';
}
return 0;
}
void bfs (int startnode)
{
queue<int>q;
q.push(startnode);
cost[startnode]=1;
while (!q.empty())
{
int node=q.front();
q.pop();
for (auto it : muchii[node])
{
if (!cost[it])
{
cost[it]=cost[node]+1;
q.push(it);
}
}
}
}