Compilare: main.cpp: In function 'int main()': main.cpp:67:23: warning: comparison of integer expressions of different signedness: '__gnu_cxx::__alloc_traits<std::allocator<int>, int>::value_type' {aka 'int'} and 'std::vector<Edge>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 67 | while (ptr[u] < g[u].size()) { main.cpp:93:13: warning: unused variable 'e2_u' [-Wunused-variable] 93 | int e2_u = tour_edges[i + 1].first; | ^~~~