Pagini recente » Cod sursa (job #2422834) | Cod sursa (job #1637449) | Cod sursa (job #2870648) | Cod sursa (job #1478019) | Cod sursa (job #2869677)
#include <bits/stdc++.h>
#define MOD 1999999973
using namespace std;
ifstream fin("bfs.in");
ofstream fout("bfs.out");
int n, m, st, d[100003];
vector<int> h[100003];
void Citire()
{
int x, y;
fin >> n >> m >> st;
for (int i = 1; i <= m; i++)
{
fin >> x >> y;
h[x].push_back(y);
}
}
void BFS(int k)
{
int nod;
queue<int> q;
q.push(k);
for (int i = 1; i <= n; i++)
d[i] = 1e9;
d[k] = 0;
while(!q.empty())
{
nod = q.front();
q.pop();
for (int w : h[nod])
{
if(d[w] > d[nod] + 1)
{
d[w] = 1 + d[nod];
q.push(w);
}
}
}
for (int i = 1; i <= n; i++)
if (d[i] == 1e9) fout << "-1 ";
else fout << d[i] << " ";
}
int main()
{
Citire();
BFS(st);
return 0;
}