Compilare: main.cpp: In function 'void Output::dbg_time()': main.cpp:247:25: warning: statement has no effect [-Wunused-value] 247 | #define gg(...) 777771449 | ^~~~~~~~~ main.cpp:256:9: note: in expansion of macro 'gg' 256 | gg(duration.count()); | ^~ In file included from /usr/include/c++/12.2.1/istream:39, from /usr/include/c++/12.2.1/sstream:38, from /usr/include/c++/12.2.1/complex:45, from /usr/include/c++/12.2.1/ccomplex:39, from /usr/include/c++/12.2.1/x86_64-pc-linux-gnu/bits/stdc++.h:54, from main.cpp:1: In member function 'std::basic_ostream<_CharT, _Traits>::__ostream_type& std::basic_ostream<_CharT, _Traits>::operator<<(long long int) [with _CharT = char; _Traits = std::char_traits<char>]', inlined from 'void solve()' at main.cpp:318:13: /usr/include/c++/12.2.1/ostream:202:25: warning: 'lo' may be used uninitialized [-Wmaybe-uninitialized] 202 | { return _M_insert(__n); } | ~~~~~~~~~^~~~~ main.cpp: In function 'void solve()': main.cpp:293:8: note: 'lo' was declared here 293 | ll lo, hi; | ^~ In member function 'std::basic_ostream<_CharT, _Traits>::__ostream_type& std::basic_ostream<_CharT, _Traits>::operator<<(long long int) [with _CharT = char; _Traits = std::char_traits<char>]', inlined from 'void solve()' at main.cpp:318:26: /usr/include/c++/12.2.1/ostream:202:25: warning: 'hi' may be used uninitialized [-Wmaybe-uninitialized] 202 | { return _M_insert(__n); } | ~~~~~~~~~^~~~~ main.cpp: In function 'void solve()': main.cpp:293:12: note: 'hi' was declared here 293 | ll lo, hi; | ^~