Cod sursa(job #3243647)

Utilizator antonio_sefu_tauLaslau Antonio antonio_sefu_tau Data 19 septembrie 2024 21:40:10
Problema BFS - Parcurgere in latime Scor 100
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 0.67 kb
#include <bits/stdc++.h>
using namespace std;
const int dim=1e5+5;
int n,m,s,d[dim];
vector<int> G[dim];
void bfs(int nod){
    for(int i=1;i<=n;i++){
        d[i]=-1;
    }
    d[nod]=0;
    queue<int> Q;
    Q.push(nod);
    while(!Q.empty()){
        int x=Q.front();
        Q.pop();
        for(auto u:G[x]){
            if(d[u]==-1){
                d[u]=d[x]+1;
                Q.push(u);
            }
        }
    }

}
int main(){
    ifstream f("bfs.in");
    ofstream g("bfs.out");
    f>>n>>m>>s;
    for(int i=1;i<=m;i++){
        int x,y;
        f>>x>>y;
        G[x].push_back(y);
    }
    bfs(s);
    for(int i=1;i<=n;i++){
        g<<d[i]<<' ';
    }

    return 0;
}