Pagini recente » Cod sursa (job #445560) | Cod sursa (job #41620) | Cod sursa (job #1773013) | Cod sursa (job #1328968) | Cod sursa (job #557593)
Cod sursa(job #557593)
#include<fstream>
#include<vector>
#include<queue>
#define pb push_back
using namespace std;
vector<int> v[100001];
queue<int> q;
int n,m,s,viz[100001];
void citire()
{
int i,x,y;
ifstream in("bfs.in");
in>>n>>m>>s;
for (i=1;i<=m;i++)
{
in>>x>>y;
v[x].pb(y);
}
}
void bfs(int p)
{
int x,y,i;
q.push(p);
while (!q.empty())
{
x=q.front();
q.pop();
for (i=0;i<(int)v[x].size();i++)
{
y=v[x][i];
if (!viz[y]&&y!=p)
{
viz[y]=viz[x]+1;
q.push(y);
}
}
}
}
void afisare()
{
int i;
ofstream out("bfs.out");
for (i=1;i<=n;i++)
if (viz[i]||i==s)
out<<viz[i]<<" ";
else
out<<"-1 ";
}
int main()
{
citire();
bfs(s);
afisare();
}