Compilare: main.cpp: In member function 'int Oriented_graph_with_costs::hamilton()': main.cpp:119:35: warning: comparison of integer expressions of different signedness: 'long int' and 'std::vector<std::vector<int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 119 | for(long k = 0; k < m_adjancency_list.size(); k++){ | ~~^~~~~~~~~~~~~~~~~~~~~~~~~~ main.cpp:136:23: warning: comparison of integer expressions of different signedness: 'long int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 136 | for(long i = 0; i < m_adjancency_list[0].size(); i++){ | ~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:153:18: warning: ISO C++ forbids converting a string constant to 'char*' [-Wwrite-strings] 153 | g.read_graph("../hamilton.in"); | ^~~~~~~~~~~~~~~~