Compilare: main.cpp: In function 'int main()': main.cpp:68:23: warning: unused variable 'st' [-Wunused-variable] 68 | int n,i,m,nod = 0,st = 0; | ^~ In constructor 'constexpr trie::trie(trie&&)', inlined from 'constexpr decltype (::new(void*(0)) _Tp) std::construct_at(_Tp*, _Args&& ...) [with _Tp = trie; _Args = {trie}]' at /usr/include/c++/12.2.1/bits/stl_construct.h:97:14, inlined from 'static constexpr void std::allocator_traits<std::allocator<_CharT> >::construct(allocator_type&, _Up*, _Args&& ...) [with _Up = trie; _Args = {trie}; _Tp = trie]' at /usr/include/c++/12.2.1/bits/alloc_traits.h:518:21, inlined from 'constexpr std::vector<_Tp, _Alloc>::reference std::vector<_Tp, _Alloc>::emplace_back(_Args&& ...) [with _Args = {trie}; _Tp = trie; _Alloc = std::allocator<trie>]' at /usr/include/c++/12.2.1/bits/vector.tcc:117:30, inlined from 'constexpr void std::vector<_Tp, _Alloc>::push_back(value_type&&) [with _Tp = trie; _Alloc = std::allocator<trie>]' at /usr/include/c++/12.2.1/bits/stl_vector.h:1294:21, inlined from 'void add_string(char*, int)' at main.cpp:26:24: main.cpp:9:8: warning: '<unnamed>.trie::ch' may be used uninitialized [-Wmaybe-uninitialized] 9 | struct trie{ | ^~~~ main.cpp: In function 'void add_string(char*, int)': main.cpp:26:30: note: '<anonymous>' declared here 26 | v.push_back(trie()); | ^ In constructor 'constexpr trie::trie(trie&&)', inlined from 'constexpr decltype (::new(void*(0)) _Tp) std::construct_at(_Tp*, _Args&& ...) [with _Tp = trie; _Args = {trie}]' at /usr/include/c++/12.2.1/bits/stl_construct.h:97:14, inlined from 'static constexpr void std::allocator_traits<std::allocator<_CharT> >::construct(allocator_type&, _Up*, _Args&& ...) [with _Up = trie; _Args = {trie}; _Tp = trie]' at /usr/include/c++/12.2.1/bits/alloc_traits.h:518:21, inlined from 'constexpr std::vector<_Tp, _Alloc>::reference std::vector<_Tp, _Alloc>::emplace_back(_Args&& ...) [with _Args = {trie}; _Tp = trie; _Alloc = std::allocator<trie>]' at /usr/include/c++/12.2.1/bits/vector.tcc:117:30, inlined from 'constexpr void std::vector<_Tp, _Alloc>::push_back(value_type&&) [with _Tp = trie; _Alloc = std::allocator<trie>]' at /usr/include/c++/12.2.1/bits/stl_vector.h:1294:21, inlined from 'int main()' at main.cpp:69:16: main.cpp:9:8: warning: '<unnamed>.trie::ch' may be used uninitialized [-Wmaybe-uninitialized] 9 | struct trie{ | ^~~~ main.cpp: In function 'int main()': main.cpp:69:22: note: '<anonymous>' declared here 69 | v.push_back(trie()); | ^