Cod sursa(job #3141150)

Utilizator DumitrescuADumitrescuA DumitrescuA Data 12 iulie 2023 20:48:11
Problema BFS - Parcurgere in latime Scor 100
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 0.84 kb
#include <fstream>
#include <vector>
#include <queue>
using namespace std;

ifstream cin("bfs.in");
ofstream cout("bfs.out");

vector<int> v[100001];

bool fost[100001];
int dist[100001];

int main()
{
    int n,m,i,a,b,x,poz;
    cin>>n>>m>>x;
    for(i=0;i<m;i++){
        cin>>a>>b;
        v[a].push_back(b);
    }
    queue <int> mers;
    mers.push(x);
    fost[x]=1;
    while(!mers.empty()){
        poz=mers.front();
        mers.pop();
        for(i=0;i<v[poz].size();i++){
            if(fost[v[poz][i]]==0){
                fost[v[poz][i]]=1;
                dist[v[poz][i]]=dist[poz]+1;
                mers.push(v[poz][i]);
            }
        }
    }
    for(i=1;i<=n;i++){
        if(dist[i]==0 && i!=x)
            cout<<"-1 ";
        else
            cout<<dist[i]<<" ";
    }

    return 0;
}