Compilare: main.cpp: In function 'int main()': main.cpp:26:27: warning: comparison of integer expressions of different signedness: 'std::set<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare] 26 | if (adj[i].size() < k) | ~~~~~~~~~~~~~~^~~ main.cpp:37:32: warning: comparison of integer expressions of different signedness: 'std::set<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare] 37 | if (adj[it].size() < k) | ~~~~~~~~~~~~~~~^~~