Pagini recente » Cod sursa (job #2008887) | Cod sursa (job #2548942) | Cod sursa (job #1350945) | Cod sursa (job #1726048) | Cod sursa (job #3318479)
#include <iostream>
#include <fstream>
#include <vector>
#include <queue>
using namespace std;
ifstream f("bfs.in");
ofstream g("bfs.out");
queue < int > q;
vector< int> L[100001];
int n,m,i,x,s,n1,n2,dist[100001];
int parinte(int x)
{
return x/2;
}
int main()
{
f>>n>>m>>s;
for(i=1;i<=m;++i)
{
f>>n1>>n2;
L[n1].push_back(n2);
}
for(i=1;i<=n;++i)
dist[i]=-1;
dist[s]=0;
q.push(s);
//g<<x<<' ';
while(!q.empty())
{
int nod=q.front();
q.pop();
for(auto vecin:L[nod])
if(dist[vecin]==-1)
{
dist[vecin]=dist[nod]+1;
//g<<i<<' ';
q.push(vecin);
}
}
for(i=1;i<=n;++i)
{
if(dist[i]==-1)
g<<-1<<' ';
else
g<<dist[i]<<' ';
}
return 0;
}