Cod sursa(job #2045547)

Utilizator SamySam2099Irsai Samuel SamySam2099 Data 22 octombrie 2017 15:11:04
Problema BFS - Parcurgere in latime Scor 100
Compilator cpp Status done
Runda Arhiva educationala Marime 0.76 kb
#include <fstream>
#include <vector>
#include <queue>
using namespace std;
ifstream f("bfs.in");
ofstream g("bfs.out");
const int Nmax=100000;
vector <int> G[Nmax+5];
queue <int>Q;
int N,M,S,D[Nmax+5],x,y;;
void solve()
{
    f>>N>>M>>S;
    for(int i=1;i<=M;i++)
    {
        f>>x>>y;
        G[x].push_back(y);
    }
    D[S]=1;
    Q.push(S);
    while(!Q.empty())
    {
        int x=Q.front();Q.pop();
        for(int i=0;i<(int)G[x].size();i++)
        {
            int vecin=G[x][i];
            if(!(D[vecin]))
            {
                D[vecin]=D[x]+1;
                Q.push(vecin);
            }
        }
    }
    for(int i=1;i<=N;i++)
    {
        g<<D[i]-1<<' ';
    }
}
int main()
{
    solve();
    return 0;
}