Cod sursa(job #2812536)

Utilizator AswVwsACamburu Luca AswVwsA Data 4 decembrie 2021 17:34:14
Problema BFS - Parcurgere in latime Scor 100
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 0.73 kb
#include <fstream>
#include <queue>
#include <vector>
#define ll long long
using namespace std;

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

const int maxN = 100003;
vector <int> a[maxN];
int ok[maxN];
int main()
{
    int n, m, s, i;
    cin >> n >> m >> s;
    while (m--)
    {
        int x, y;
        cin >> x >> y;
        a[x].push_back(y);
    }
    queue <int> q;
    ok[s] = 1;
    q.push(s);
    while (!q.empty())
    {
        int v = q.front();
        q.pop();
        for (int it : a[v])
            if (ok[it] == 0)
            {
                ok[it] = ok[v] + 1;
                q.push(it);
            }
    }
    for (i = 1; i <= n; i++)
        cout << ok[i] - 1 << " ";
}