Compilare: main.cpp: In member function 'bool Graph::havelHakim(std::vector<int>)': main.cpp:145:18: warning: comparison of integer expressions of different signedness: '__gnu_cxx::__alloc_traits<std::allocator<int>, int>::value_type' {aka 'int'} and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 145 | if(grades[0] > grades.size()-1) main.cpp: In function 'int main()': main.cpp:287:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 287 | for(int i = 2; i< minDistances.size(); i++) { | ~^~~~~~~~~~~~~~~~~~~~~