Pagini recente » Cod sursa (job #3179875) | Cod sursa (job #1236234) | Cod sursa (job #1429448) | Cod sursa (job #683854) | Cod sursa (job #2345057)
#include <bits/stdc++.h>
#define inf (1 <<30 )
using namespace std;
ifstream f("bfs.in");
ofstream g("bfs.out");
int n,m,a,x,y,varf,dist[100001];
vector<int> v[100001];
queue <int> q;
int main()
{ f>>n>>m>>a;
for(int i=1;i<=m;i++)
{ f>>x>>y;
v[x].push_back(y);
}
for(int i=1;i<=n;i++)
dist[i]=inf;
dist[a]=0;
q.push(a);
while(!q.empty())
{ varf=q.front();
q.pop();
for(int i=0;i<v[varf].size();i++)
if(dist[v[varf][i]]>dist[varf]+1)
{
q.push(v[varf][i]);
dist[v[varf][i]]=dist[varf]+1;
}
}
for(int i=1;i<=n;i++)
if(dist[i]==inf) g<<-1<<" ";
else g<<dist[i]<<" ";
return 0;
}