Pagini recente » Cod sursa (job #3168916) | Cod sursa (job #2251084) | Cod sursa (job #2504762) | Cod sursa (job #3192404) | Cod sursa (job #2713934)
#include <iostream>
#include <fstream>
#include <vector>
#define Dmax 100005
using namespace std;
int n,m,s;
vector < int > G[Dmax];
int cost[Dmax]={-1};
ifstream f("bfs.in");
ofstream g("bfs.out");
void citire()
{
f>>n>>m>>s;
for(int i=1;i<=m;i++)
{
int x,y;
f>>x>>y;
G[x].push_back(y);
}
for(int i=1;i<=n;i++)
cost[i]=-1;
}
void BFS(int v)
{
int coada[Dmax],inc=1,sf=1;
coada[sf]=v;
cost[v]=0;
while(inc<=sf)
{
v=coada[inc];
for(unsigned int i=0; i<G[v].size(); i++)
{
int Vecin = G[v][i];
if(cost[Vecin]==-1)
{
coada[++sf]=Vecin;
cost[Vecin]=cost[v]+1;
}
}
inc++;
}
for(int i=1; i<=n;i++)
g<<cost[i]<<" ";
}
int main()
{
citire();
BFS(s);
f.close();
g.close();
return 0;
}