Pagini recente » Cod sursa (job #3177103) | Cod sursa (job #1705920) | Cod sursa (job #2311226) | Cod sursa (job #831077) | Cod sursa (job #3122127)
#include <bits/stdc++.h>
#define MAXN 100000
using namespace std;
ifstream fin("bfs.in");
ofstream fout("bfs.out");
vector<vector<int>> read(int& start) {
int n, m;
fin >> n >> m >> start;
start--;
vector<vector<int>> adj(n, vector<int>());
for (int i = 0; i < m; i++) {
int iNode, jNode;
fin >> iNode >> jNode;
iNode--, jNode--;
adj[iNode].push_back(jNode);
}
return adj;
}
int main() {
int start, dist[MAXN];
vector<vector<int>> adj = read(start);
memset(dist, -1, sizeof(int) * adj.size());
queue<int> neighbours;
neighbours.push(start);
dist[start] = 0;
while (!neighbours.empty()) {
int current = neighbours.front(); neighbours.pop();
for (auto& neighbour: adj[current])
if (dist[neighbour] == -1) {
dist[neighbour] = dist[current] + 1;
neighbours.push(neighbour);
}
}
for (int i = 0; i < adj.size(); i++)
fout << dist[i] << ' ';
return 0;
}