Cod sursa(job #3209345)

Utilizator Robert_OprisanRobert Oprisan Robert_Oprisan Data 2 martie 2024 11:40:12
Problema BFS - Parcurgere in latime Scor 0
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 0.83 kb
#include <fstream>
#include <queue>
#include <iostream>
#include <vector>
using namespace std;


ifstream in("bfs.in");
ofstream out("bfs.out");
const int NMAX = 100001;
int n, m,s;
int dis[NMAX];
vector<int> v[NMAX];

void citire(){
    in >> n >> m>> s;
    for(int i = 0 ; i < m ; i ++){
        int x,y;
        in >> x>> y;
        if(x!=y)
            v[x].push_back(y);
    }
}

void bfs(){
    queue<int> q;
    dis[s] = 1;
    q.push(s);
    while(!q.empty()){
        int nod = q.front();
        q.pop();
        for ( int i= 0; i < v[nod].size(); i++){
            int neigh = v[nod][i];
            if(!dis[neigh]){
                q.push(neigh);
                dis[neigh]= dis[nod]+1;
            }
        }
    }

}

int main(){
    citire();
    bfs();
    for (int i = 1 ; i <= n; i ++){
        cout <<dis[i]-1 << " ";
    }
}