Pagini recente » Cod sursa (job #2230141) | Cod sursa (job #3282287) | Cod sursa (job #1158725) | Cod sursa (job #2822990) | Cod sursa (job #1142128)
# include <cstdio>
# include <algorithm>
# include <cstring>
# include <vector>
# define pb push_back
# define ed end
# define bg begin
# define N 100010
using namespace std;
int n,m,s,nr;
int x,c;
vector <int> G[N];
bool sel[N];
struct coada
{
int x,c;
};
coada Q[N];
bool cmp(coada a, coada b)
{
return a.x<b.x;
}
void load()
{
int i,x,y;
scanf("%d %d %d\n", &n, &m, &s);
for(i=1; i<=m; ++i)
{
scanf("%d %d\n", &x, &y);
if(x!=y) G[x].pb(y);
}
}
void bf(int x)
{
int i;
vector <int> :: iterator it;
i=nr=1;
Q[nr].x=x;
Q[nr].c=0;
sel[x]=true;
for(i=1; i<=nr; ++i)
{
x=Q[i].x;
for(it=G[x].bg(); it!=G[x].ed(); ++it)
if(!sel[*it])
{
sel[*it]=true;
Q[++nr].x=*it;
Q[nr].c=Q[i].c+1;
}
}
}
void write()
{
int i,k=0;
sort(Q+1,Q+nr+1,cmp);
for(i=1; i<=n; ++i)
if(!sel[i]) printf("-1 ");
else printf("%d ", Q[++k].c);
}
void solve()
{
load();
bf(s);
write();
}
int main()
{
freopen("bfs.in", "r", stdin);
freopen("bfs.out", "w", stdout);
solve();
}