Cod sursa(job #3368116)

Utilizator SpiketySurei Stefan Spikety Data 13 octombrie 2026 11:28:21
Problema BFS - Parcurgere in latime Scor 0
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 1 kb
#include <iostream>
#include <vector>
#include <list>
#include<fstream>
#include <queue>
using namespace std;
ifstream fin("bfs.in");
ofstream fout("bfs.out");
vector<list<int>>graf;
vector<bool>viz;

void add(int x, int y){
    graf[x].push_back(y);
}
int bfs(int S, int X){
    viz[S]=true;
    vector<int>dist(graf.size(), -1);
    queue<int>q;
    q.push(S);
    while(!q.empty()){
        int x=q.front();
        q.pop();
        for(int i:graf[x]){
            if(!viz[i]){
                viz[i]=true;
                q.push(i);
                dist[i]=dist[x]+1;
                if(i==X){
                    return dist[i];
                }   
            }
        }
    }
} 
int main(){
    int n,m,x,y,S;
    fin>>n>>m>>S;
    graf.resize(n+1);
    for(int i=0;i<m;++i){
        fin>>x>>y;
        add(x,y);
    }
    for(int i=1;i<=n;++i){
        viz.resize(n+1, false);
        fout<<bfs(i, S)<<' ';

    }
    fin.close();
    fout.close();
    return 0;
}