Pagini recente » Cod sursa (job #1137371) | Cod sursa (job #2494277) | Cod sursa (job #291805) | Cod sursa (job #2473393) | Cod sursa (job #396431)
Cod sursa(job #396431)
#include<stdio.h>
#include<vector>
#define N 1<<17
using namespace std;
vector<int> a[N];
int n,m,x0,pred[N],d[N];
void citire()
{
int x,y;
scanf("%d%d%d",&n,&m,&x0);
while (m--)
{
scanf("%d%d",&x,&y);
a[x].push_back(y);
}
for(int i=0;i<=N;i++)
d[i]=-1;
}
void bfs()
{
int p=0,u=0,x,y,coada[N],i;
coada[u++]=x0;
d[x0]=0;
pred[x0]=0;
while(p!=u)
{
x=coada[p++];
for(i=0;i<a[x].size();++i)
{
y=a[x][i];
if(d[y]==-1)
{
coada[u++]=y;
d[y]=1+d[x];
pred[y]=x;
}
}
}
}
void afisare()
{
int i;
for(i=1;i<=n;i++)
printf("%d ",d[i]);
}
int main()
{
freopen("bfs.in","r",stdin);
freopen("bfs.out","w",stdout);
citire();
bfs();
afisare();
}