Eroare de compilare: main.cpp: In function 'int find(std::vector<int>&, int)': main.cpp:8:11: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 8 | if (x < parent.size() && parent[x] != x) { | ~~^~~~~~~~~~~~~~~ main.cpp: In function 'int minimumMetroCost(int, int, int, std::vector<std::vector<int> >&)': main.cpp:35:5: error: 'iota' was not declared in this scope 35 | iota(parent.begin(), parent.end(), 0); // Initializează parent cu valorile 0, 1, ..., N-1 | ^~~~ Non zero exit status: 1