Compilare: main.cpp: In function 'int main()': main.cpp:42:29: warning: comparison of integer expressions of different signedness: 'std::set<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare] 42 | if(adj[i].size()==total) | ~~~~~~~~~~~~~^~~~~~~ main.cpp:59:51: warning: comparison of integer expressions of different signedness: 'std::set<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare] 59 | if(nod>i and adj[nod].size()+adj[i].size()==total){ | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~