Compilare: main.cpp: In function 'int main()': main.cpp:83:22: 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] 83 | while(ptr[u] < adj[u].size()) { main.cpp:104:20: warning: comparison of integer expressions of different signedness: 'std::vector<ResultStep>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare] 104 | if (ans.size() != n) { | ~~~~~~~~~~~^~~~