Pagini recente » Cod sursa (job #954059) | Cod sursa (job #1221860) | Cod sursa (job #2656725) | Cod sursa (job #2252337) | Cod sursa (job #2294353)
#include <bits/stdc++.h>
using namespace std;
ifstream fin("bfs.in");
ofstream fout("bfs.out");
const int NMAX = 100005;
vector <int> v[NMAX];
int dist[NMAX];
void bfs(int start)
{
memset(dist,-1,sizeof(dist));
queue<int> q;
q.push(start);
dist[start]=0;
while(!q.empty())
{
int nod=q.front();
q.pop();
for(int i=0;i<v[nod].size();i++)
{
int vecin=v[nod][i];
if(dist[vecin]==-1)
{
dist[vecin]=dist[nod]+1;
q.push(vecin);
}
}
}
}
int main()
{
int n,m,s;
fin >> n >> m >> s;
int x,y;
for(int i=1;i<=m;i++)
{
fin >> x >> y;
v[x].push_back(y);
}
bfs(s);
for(int i=1;i<=n;i++)
{
fout << dist[i] << ' ';
}
return 0;
}