Cod sursa(job #3317182)

Utilizator bmihai222Bidiga Mihai bmihai222 Data 22 octombrie 2025 16:57:16
Problema BFS - Parcurgere in latime Scor 100
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 0.94 kb
#include <iostream>
#include <fstream>
#include <vector>
#include <queue>

using namespace std;

const int MAXN = 100001;

int n, m, s;
vector<int> adj[MAXN];
int dist[MAXN];

int main() {
    ifstream fin("bfs.in");
    ofstream fout("bfs.out");

    ios_base::sync_with_stdio(false);
    fin.tie(NULL);

    fin >> n >> m >> s;

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

    for (int i = 1; i <= n; ++i) {
        dist[i] = -1;
    }

    queue<int> q;
    
    dist[s] = 0;
    q.push(s);
    
    while (!q.empty()) {
        int u = q.front();
        q.pop();
        
        for (int v : adj[u]) {
            if (dist[v] == -1) {
                dist[v] = dist[u] + 1;
                q.push(v);
            }
        }
    }

    for (int i = 1; i <= n; ++i) {
        fout << dist[i] << " ";
    }
    fout << "\n";

    return 0;
}