Compilare: main.cpp: In function 'int main()': main.cpp:37:13: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'unsigned int'} [-Wsign-compare] 37 | while (idx<q.size()) { | ~~~^~~~~~~~~ main.cpp:40:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'unsigned int'} [-Wsign-compare] 40 | for (int i=0; i<g[nod].size(); ++i) { | ~^~~~~~~~~~~~~~