Mai intai trebuie sa te autentifici.
Cod sursa(job #1640190)
Utilizator | Data | 8 martie 2016 16:18:32 | |
---|---|---|---|
Problema | BFS - Parcurgere in latime | Scor | 100 |
Compilator | cpp | Status | done |
Runda | Arhiva educationala | Marime | 0.82 kb |
#include <cstdio>
#include <vector>
#include <queue>
using namespace std;
vector<int> v[100010];
queue<int> q;
int d[100010];
char vaz[100010];
int main()
{
freopen("bfs.in", "r", stdin);
freopen("bfs.out", "w", stdout);
int n,m,s,x,y;
scanf("%d%d%d",&n,&m,&s);
for(int i=1;i<=m;i++)
{
scanf("%d%d",&x,&y);
v[x].push_back(y);
}
for(int i=1;i<=n;i++) d[i]=-1;
q.push(s);
d[s]=0;vaz[s]=1;
while(!q.empty())
{
int nod=q.front();q.pop();
for(vector<int>::iterator it=v[nod].begin();it!=v[nod].end();it++)
if(!vaz[*it])
{
vaz[*it]=1;
d[*it]=d[nod]+1;
q.push(*it);
}
}
for(int i=1;i<=n;i++) printf("%d ",d[i]);
return 0;
}