Cod sursa(job #2559518)

Utilizator anamaria_panait.10Panait Ana-Maria anamaria_panait.10 Data 27 februarie 2020 12:56:36
Problema BFS - Parcurgere in latime Scor 100
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 0.93 kb
#include<bits/stdc++.h>
using namespace std;

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

vector<int> mat[100005];
queue<int> coada;
int dist[100005];

void BFS(int nod_plecare){
    coada.push(nod_plecare);
    dist[nod_plecare] = 0;
    int nodcurent, vecin;
    while(!coada.empty()){
        nodcurent= coada.front();
        coada.pop();
        for(unsigned int i = 0; i < mat[nodcurent].size(); i++){
            vecin = mat[nodcurent][i];
            if(dist[vecin] == -1){
                coada.push(vecin);
                dist[vecin] = dist[nodcurent] + 1;
            }
        }
    }
}

int main()
{
    int n, m, s, x, y;
    in >> n >> m >> s;
    for(int i = 1; i <= n; i++){
        dist[i] = -1;
    }
    for(int i = 1; i <= m; i++){
        in >> x >> y;
        mat[x].push_back(y);
    }
    BFS(s);
    for(int i = 1; i <= n; i++){
        out << dist[i] <<' ';
    }
    return 0;
}