Cod sursa(job #3300682)

Utilizator toma_ariciuAriciu Toma toma_ariciu Data 18 iunie 2025 15:51:38
Problema BFS - Parcurgere in latime Scor 100
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 1.02 kb
#include <bits/stdc++.h>

using namespace std;

const int maxN = 100005, inf = 1e9;
int n, m, s, dist[maxN];
vector <int> G[maxN];
bool viz[maxN];

void read() {
    cin >> n >> m >> s;
    for (int i = 0; i < m; i++) {
        int x, y;
        cin >> x >> y;
        G[x].push_back(y);
    }
}

void bfs() {
    for (int i = 1; i <= n; i++) {
        dist[i] = -1;
    }
    queue <int> q;
    q.push(s);
    dist[s] = 0;
    viz[s] = 1;
    while (!q.empty()) {
        int nod = q.front();
        q.pop();
        for (int vecin : G[nod]) {
            if (!viz[vecin]) {
                dist[vecin] = dist[nod] + 1;
                q.push(vecin);
                viz[vecin] = 1;
            }
        }
    }
}

void print() {
    for (int i = 1; i <= n; i++) {
        cout << dist[i] << ' ';
    }
}


int main() {
#ifdef LOCAL
    freopen("test.in", "r", stdin);
    freopen("test.out", "w", stdout);
#else
    freopen("bfs.in", "r", stdin);
    freopen("bfs.out", "w", stdout);
#endif
    read();
    bfs();
    print();
    return 0;
}