Compilare: main.cpp: In function 'int main()': main.cpp:40:20: warning: pointer to a function used in arithmetic [-Wpointer-arith] 40 | dfs[nod]; | ^ main.cpp:40:20: warning: value computed is not used [-Wunused-value] 40 | dfs[nod]; | ~~~~~~~^ main.cpp:40:20: warning: statement has no effect [-Wunused-value] In file included from /usr/include/c++/12.2.1/string:47, from /usr/include/c++/12.2.1/bits/locale_classes.h:40, from /usr/include/c++/12.2.1/bits/ios_base.h:41, from /usr/include/c++/12.2.1/ios:42, from /usr/include/c++/12.2.1/ostream:38, from /usr/include/c++/12.2.1/iostream:39, from main.cpp:1: In constructor 'constexpr __gnu_cxx::__normal_iterator<_Iterator, _Container>::__normal_iterator(const _Iterator&) [with _Iterator = int*; _Container = std::vector<int>]', inlined from 'constexpr std::vector<_Tp, _Alloc>::iterator std::vector<_Tp, _Alloc>::begin() [with _Tp = int; _Alloc = std::allocator<int>]' at /usr/include/c++/12.2.1/bits/stl_vector.h:869:16, inlined from 'void dfs(int)' at main.cpp:16:28: /usr/include/c++/12.2.1/bits/stl_iterator.h:1073:9: warning: array subscript 300006 is outside array bounds of 'std::vector<int> [100002]' [-Warray-bounds] 1073 | : _M_current(__i) { } | ^~~~~~~~~~~~~~~ main.cpp: In function 'void dfs(int)': main.cpp:10:13: note: at offset 2400048 into object 'adj' of size 2400048 10 | vector<int> adj[nmax]; | ^~~ In constructor 'constexpr __gnu_cxx::__normal_iterator<_Iterator, _Container>::__normal_iterator(const _Iterator&) [with _Iterator = int*; _Container = std::vector<int>]', inlined from 'constexpr std::vector<_Tp, _Alloc>::iterator std::vector<_Tp, _Alloc>::end() [with _Tp = int; _Alloc = std::allocator<int>]' at /usr/include/c++/12.2.1/bits/stl_vector.h:889:16, inlined from 'void dfs(int)' at main.cpp:16:28: /usr/include/c++/12.2.1/bits/stl_iterator.h:1073:9: warning: array subscript 300007 is outside array bounds of 'std::vector<int> [100002]' [-Warray-bounds] 1073 | : _M_current(__i) { } | ^~~~~~~~~~~~~~~ main.cpp: In function 'void dfs(int)': main.cpp:10:13: note: at offset 2400056 into object 'adj' of size 2400048 10 | vector<int> adj[nmax]; | ^~~