Compilare: In file included from /usr/include/c++/12.2.1/ext/hash_map:60, from main.cpp:2: /usr/include/c++/12.2.1/backward/backward_warning.h:32:2: warning: #warning This file includes at least one deprecated or antiquated header which may be removed without further notice at a future date. Please use a non-deprecated interface with equivalent functionality instead. For a listing of replacement headers and interfaces, consult the file backward_warning.h. To disable this warning use -Wno-deprecated. [-Wcpp] 32 | #warning \ | ^~~~~~~ main.cpp: In function 'void dfs(int, int)': main.cpp:27:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 27 | for(int i=0;i<son[node].size();i++){ | ~^~~~~~~~~~~~~~~~~