Pagini recente » Cod sursa (job #1716134) | Cod sursa (job #2942053) | Cod sursa (job #1517816) | Cod sursa (job #3168250) | Cod sursa (job #3266831)
#include <bits/stdc++.h>
using namespace std;
ifstream fin("bfs.in");
ofstream fout("bfs.out");
int n, viz[100005], d[100005];
vector<int>L[100005];
void BFS(int x)
{
int k;
queue<int> q;
q.push(x); viz[x] = 1; d[x] = 0;
while(!q.empty())
{
k = q.front();
q.pop();
for(int i : L[k])
if(!viz[i])
{
q.push(i);
d[i] = d[k] + 1;
viz[i] = 1;
}
}
}
int main()
{
int i, j, m, x;
fin >> n >> m >> x;
//while()
for(int p = 1; p <= m; p++)
{
fin >> i >> j;
L[i].push_back(j);
}
BFS(x);
for(i = 1; i <= n; i++)
if(viz[i]) fout << d[i] << " ";
else fout << "-1 ";
return 0;
}