Cod sursa(job #1854484)

Utilizator tudor_bonifateTudor Bonifate tudor_bonifate Data 22 ianuarie 2017 19:40:54
Problema BFS - Parcurgere in latime Scor 100
Compilator cpp Status done
Runda Arhiva educationala Marime 0.76 kb
#include <cstdio>
#include <vector>
#include <queue>
using namespace std;
vector <int> g[100005];
queue <int> q;
int d[100005],n,m,s,i,crt,x,y;
int main()
{
    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);
        g[x].push_back(y);
    }
    for (i=1; i<=n; i++) d[i]=-1;
    d[s]=0;
    q.push(s);
    while (!q.empty())
    {
        crt=q.front();
        q.pop();
        for (i=0; i<g[crt].size(); i++)
        {
            if (d[g[crt][i]]==-1)
            {
                d[g[crt][i]]=d[crt]+1;
                q.push(g[crt][i]);
            }
        }
    }
    for (i=1; i<=n; i++) printf("%d ",d[i]);
    return 0;
}