Compilare: main.cpp: In member function 'int Graf::hamilton(std::vector<std::vector<std::pair<int, int> > >)': main.cpp:36:35: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 36 | for(int k = 0; k < lista[j].size(); k++) | ~~~^~~~~~~~~~~~~~~~~ main.cpp:40:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 40 | for(int i = 0; i < lista[0].size(); i++) | ~~^~~~~~~~~~~~~~~~~