Cod sursa(job #3305460)

Utilizator SGLDCASA SI PODUL SGLD Data 1 august 2025 19:08:13
Problema BFS - Parcurgere in latime Scor 100
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 0.74 kb
#include <fstream>
#include<vector>
#include<queue>
using namespace std;
ifstream in("bfs.in");
ofstream out("bfs.out");
vector<int> se[100001];
int arr[100001];
void bfs(int sursa)
{
    arr[sursa]=1;
    queue<int> q;
    q.push(sursa);
    while(!q.empty())
    {
        int rn=q.front();
        q.pop();
        for(auto sec: se[rn])
        {
            if(arr[sec]==0){
            arr[sec]=arr[rn]+1;
            q.push(sec);
            }
        }
    }
}
int main()
{
    int n,m,nr;
    in>>n>>m>>nr;
    int q1,q2;
    for(int i=1; i<=m; i++)
    {
        in>>q1>>q2;
        se[q1].push_back(q2);
    }
    bfs(nr);
    for(int i=1; i<=n; i++)
    {
        out<<arr[i]-1<<" ";
    }
    return 0;
}