Compilare: main.cpp: In function 'int main()': main.cpp:67:41: warning: comparison of integer expressions of different signedness: 'ull' {aka 'long long unsigned int'} and 'long long int' [-Wsign-compare] 67 | if(getHashB(i, i + sol - 1) == val) { | ~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~ 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 'int main()' at main.cpp:72:52: /usr/include/c++/12.2.1/ostream:202:25: warning: 'startB' may be used uninitialized [-Wmaybe-uninitialized] 202 | { return _M_insert(__n); } | ~~~~~~~~~^~~~~ main.cpp: In function 'int main()': main.cpp:65:13: note: 'startB' was declared here 65 | int startB; | ^~~~~~