Pagini recente » Cod sursa (job #1945187) | Cod sursa (job #2981162) | Cod sursa (job #2870512) | Cod sursa (job #167108) | Cod sursa (job #759153)
Cod sursa(job #759153)
#include <cstdio>
#include <vector>
#include <algorithm>
using namespace std;
#define MAX 100001
vector<int>g[MAX];
int n,s,d[MAX],c[MAX];
bool viz[MAX];
void bfs(){
int p,u,x,y;
c[p=u=1]=s;
viz[s]=1;
while(p<=u)
{
x=c[p];
for(int i=0;i<g[x].size();i++)
{
y=g[x][i];
if(!viz[y])
{
viz[y]=1;
c[u++]=y;
d[y]=d[x]+1;
}
}
p++;
}
}
int main(){
int m,x,y;
freopen("bfs.in","r",stdin);
freopen("bfs.out","w",stdout);
scanf("%d %d %d",&n,&m,&s);
while(m--)
{
scanf("%d %d",&x,&y);
g[x].push_back(y);
}
bfs();
for(int i=1;i<=n;i++)printf("%d ",d[i]==0 && i!=s ?-1:d[i]);
return 0;
}