Cod sursa(job #3368656)

Utilizator creduardCremenescu Eduard-Gabriel creduard Data 15 octombrie 2026 10:39:34
Problema BFS - Parcurgere in latime Scor 0
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 0.96 kb
#include <bits/stdc++.h>
using namespace std;

vector<int> L[100001];
int d[100001];
int n, m, s;
const int INF = 1e9;

void bfs(int sursa) {
    for (int i = 1; i <= n; i++) {
        d[i] = INF;
    }
    d[sursa] = 0;
    queue<int> q;
    q.push(sursa);
    while (!q.empty()) {
        int node = q.front();
        q.pop();
        for (auto vec: L[node]) {
            if (d[vec] > d[node] + 1) {
                // d[vec] == INF
                d[vec] = d[node] + 1;
                q.push(vec);
            }
        }
    }
}

int main() {
    ifstream f("bfs.in");
    ofstream g("bfs.out");

    cin >> n >> m >> s;
    for (int i = 1; i <= m; i++) {
        int x, y;
        cin >> x >> y;
        L[x].push_back(y);
        // L[y].push_back(x); // pentru graf orientat - scoatem linia
    }
    bfs(s);
    for (int i = 1; i <= n; i++) {
        if (d[i] == INF) d[i] = -1;
        cout << d[i] << ' ';
    }
    return 0;
}