Cod sursa(job #2796601)

Utilizator truscalucaLuca Trusca truscaluca Data 8 noiembrie 2021 15:36:05
Problema BFS - Parcurgere in latime Scor 50
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 0.85 kb
#include <iostream>
#include <list>
#include <queue>

using namespace std;

const int nMax = 100005;

int n, m, s;
list<int> v[nMax];

int bfs(int f) {
    int viz[nMax] = {};

    queue<pair<int, int>> q;
    q.push({s, 0});

    while (!q.empty()) {
        auto curr = q.front();
        q.pop();

        if (curr.first == f) {
            return curr.second;
        }

        for (auto x:v[curr.first]) {
            if (!viz[x]) {
                viz[x] = 1;
                q.push({x, curr.second + 1});
            }
        }
    }

    return -1;
}

int main() {
    freopen("bfs.in", "r", stdin);
    freopen("bfs.out", "w", stdout);

    cin >> n >> m >> s;

    for (int i = 0; i < m; i++) {
        int x, y;
        cin >> x >> y;
        v[x].push_back(y);
    }

    for (int i = 1; i <= n; i++) {
        cout << bfs(i) << " ";
    }

    return 0;
}