Compilare: main.cpp: In function 'int main()': main.cpp:34:28: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 34 | for (int j=0; j<g[a].size(); j++) | ~^~~~~~~~~~~~ main.cpp:55:28: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 55 | for (int i=0; i<g[a].size(); i++) | ~^~~~~~~~~~~~