Cod sursa(job #3266831)

Utilizator inacioataCioata Ana Irina inacioata Data 10 ianuarie 2025 16:57:21
Problema BFS - Parcurgere in latime Scor 100
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 0.77 kb
#include <bits/stdc++.h>
using namespace std;
ifstream fin("bfs.in");
ofstream fout("bfs.out");
int n, viz[100005], d[100005];
vector<int>L[100005];

void BFS(int x)
{
    int k;
    queue<int> q;
    q.push(x); viz[x] = 1; d[x] = 0;
    while(!q.empty())
    {
        k = q.front();
        q.pop();
        for(int i : L[k])
            if(!viz[i])
        {
            q.push(i);
            d[i] = d[k] + 1;
            viz[i] = 1;
        }
    }
}

int main()
{
    int i, j, m, x;
    fin >> n >> m >> x;
    //while()
    for(int p = 1; p <= m; p++)
    {
        fin >> i >> j;
        L[i].push_back(j);
    }

    BFS(x);
    for(i = 1; i <= n; i++)
        if(viz[i]) fout << d[i] << " ";
        else fout << "-1 ";
    return 0;
}