Mai intai trebuie sa te autentifici.
Cod sursa(job #2916414)
Utilizator | Data | 29 iulie 2022 17:10:14 | |
---|---|---|---|
Problema | BFS - Parcurgere in latime | Scor | 0 |
Compilator | cpp-64 | Status | done |
Runda | Arhiva educationala | Marime | 0.93 kb |
#include <iostream>
#include <fstream>
#include <queue>
using namespace std;
ifstream f("bfs.in");
ofstream g("bfs.out");
int a[1001][1001],viz[1001],n,m,i,l,c,s,b,nr=1,nrad,nrad2;
queue <int>q;
void bfs()
{
q.push(s);
nrad=1;
while(!q.empty())
{
b=q.front();
for(i=1;i<=n;i++)
{
if(a[b][i]==1&&viz[i]==0)
{
q.push(i);
viz[i]=nr;
nrad2++;
}
}
nrad--;
if(nrad==0)
{
nr++;
nrad=nrad2;
nrad2=0;
}
q.pop();
}
}
int main()
{
f>>n>>m>>s;
for(i=1;i<=m;i++)
{
f>>l>>c;
a[l][c]=1;
}
bfs();
viz[s]=0;
for(i=1;i<=n;i++)
{
if(i!=s&&viz[i]==0)
cout<<-1<<" ";
else
cout<<viz[i]<<" ";
}
return 0;
}