Eroare de compilare: main.cpp:9:1: error: 'unordered_map' does not name a type 9 | unordered_map<int, int> last; | ^~~~~~~~~~~~~ main.cpp:10:1: error: 'unordered_map' does not name a type 10 | unordered_map<int, int> fr; | ^~~~~~~~~~~~~ main.cpp:11:1: error: 'unordered_map' does not name a type 11 | unordered_map<int, vector<int>> X; | ^~~~~~~~~~~~~ main.cpp: In function 'void dfs(int)': main.cpp:17:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 17 | for (int i = 0; i<g[nod].size(); ++i) { | ~^~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:34:43: error: 'fr' was not declared in this scope 34 | for (int i=1; i<=n; ++i) { cin>>a[i]; ++fr[a[i]]; if (fr[a[i]]==1) ++d; } | ^~ main.cpp:43:7: error: 'X' was not declared in this scope 43 | X[aux/p].push_back(i); | ^ main.cpp:54:11: error: 'last' was not declared in this scope 54 | if (last[aux/p] > 0) { | ^~~~ main.cpp:59:23: error: 'X' was not declared in this scope 59 | for (int j=0; j<X[aux/p].size(); ++j) | ^ main.cpp:63:5: error: 'last' was not declared in this scope 63 | last[a[i]] = i; | ^~~~ main.cpp:82:24: error: 'fr' was not declared in this scope 82 | for (int j=1; j<=fr[a[st]]; ++j) cout<<a[st]<<" "; | ^~ Non zero exit status: 1