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Topological Sort
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| bool vis[MAXN]; | |
| void topodfs(int cur, vector<int> &ans) { | |
| if (vis[cur]) | |
| return; | |
| vis[cur] = true; | |
| for (auto i : adj[cur]) | |
| topodfs(i, ans); | |
| ans.push_back(cur); | |
| } | |
| vector<int> toposort() { | |
| vector<int> ans; | |
| for (int i = 0; i < N; i++) | |
| topodfs(i, ans); | |
| reverse(ans.begin(), ans.end()); | |
| return ans; | |
| } |
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