Cod sursa(job #1077763)

Utilizator PlatonPlaton Vlad Platon Data 11 ianuarie 2014 17:19:40
Problema BFS - Parcurgere in latime Scor 20
Compilator cpp Status done
Runda Arhiva educationala Marime 0.79 kb
#include <stdio.h>
#include <stdlib.h>
#include <vector>

#define maxn 10000

using std::vector;

int n, m, s, cost[maxn];
vector<int> nod[maxn];
bool viz[maxn];

void bfs(int x, int c)
{
    viz[x]=1;
    cost[x]=c;
    for(int i=0;i<nod[x].size();i++)
    {
        if(!viz[nod[x][i]])
        {
            bfs(nod[x][i], c+1);
        }
    }
}

int main()
{
    freopen("bfs.in", "r", stdin);
    freopen("bfs.out", "w", stdout);

    scanf("%d %d %d", &n, &m, &s);

    for(int i=0;i<m;i++)
    {
        int aux1, aux2;
        scanf("%d %d", &aux1, &aux2);
        nod[aux1].push_back(aux2);
    }

    for(int i=1;i<=n;i++)
    {
        cost[i]=-1;
    }

    bfs(s,0);

    for(int i=1;i<=n;i++)
    {
        printf("%d ", cost[i]);
    }
}