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- void dfs(vector<vector<int>> &adj, vector<bool> &visited, int u) {
- if (visited[u]) {
- return;
- }
- visited[u] = true;
- for (int i = 0; i < adj[u].size(); i++) {
- int v = adj[u][i];
- dfs(adj, visited, v);
- }
- }
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