Pagini recente » Cod sursa (job #687450) | Cod sursa (job #484090) | Cod sursa (job #1802969) | Cod sursa (job #1006490) | Cod sursa (job #975080)
Cod sursa(job #975080)
#include<stdio.h>
#include<vector>
#include<queue>
#define pb push_back
#define maxn 100005
#define inf 0x3f3f3f3f
using namespace std;
int n,m,s;
int v[maxn],d[maxn];
vector <int> l[maxn];
void read()
{
int i;
int x,y;
scanf("%d%d%d",&n,&m,&s);
for(i=1;i<=m;i++)
{
scanf("%d%d",&x,&y);
l[x].pb(y);
}
for(i=1;i<=n;i++) d[i]=inf;
}
void bfs()
{
queue <int> q;
int k;
q.push(s); v[s]=1; d[s]=0;
while(!q.empty())
{
k=q.front();
for(unsigned int i=0;i<l[k].size();i++)
if(v[l[k][i]]==0)
{
q.push(l[k][i]);
d[l[k][i]]=d[k]+1;
v[l[k][i]]=1;
}
q.pop();
}
}
void print()
{
int i;
for(i=1;i<=n;i++)
if(d[i]==inf)
printf("-1 ");
else printf("%d ",d[i]);
}
int main()
{
freopen("bfs.in","r",stdin);
freopen("bfs.out","w",stdout);
read();
bfs();
print();
fclose(stdin);
fclose(stdout);
return 0;
}