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Cod sursa(job #793574)
#include<stdio.h>
#include<stdlib.h>
using namespace std;
#define NMAX 100001
int cost[NMAX],l[NMAX],c[NMAX],*v[NMAX],n;
inline void bfs(int nod)
{
int i,st,dr;
for(i=1;i<=n;i++)
cost[i]=-1;
st=1;
dr=1;
c[st]=nod;
cost[nod]=0;
while(st<=dr) {
for(i=1;i<=l[c[st]];i++)
if(cost[v[c[st]][i]]==-1) {
cost[v[c[st]][i]]=cost[c[st]]+1;
c[++dr]=v[c[st]][i];
}
st++;
}
}
int main ()
{
int m,i,x,y,s;
freopen("bfs.in","r",stdin);
freopen("bfs.out","w",stdout);
scanf("%d %d %d",&n,&m,&s);
for(i=1;i<=m;i++) {
scanf("%d %d",&x,&y);
l[x]++;
l[y]++;
}
for(i=1;i<=n;i++) {
v[i]=new int(l[i]+1);
l[i]=0;
}
fseek(stdin,0,SEEK_SET);
scanf("%d %d %d",&n,&m,&s);
for(i=1;i<=m;i++) {
scanf("%d %d",&x,&y);
v[x][++l[x]]=y;
}
fclose(stdin);
bfs(s);
for(i=1;i<=n;i++)
printf("%d ",cost[i]);
fclose(stdout);
return 0;
}