Compilare: main.cpp: In function 'int code_hash(std::string&)': main.cpp:30:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 30 | for ( i = 0; i < s.size(); i++ ) | ~~^~~~~~~~~~ main.cpp: In function 'bool check(std::string&, std::string&, int)': main.cpp:50:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 50 | while ( i < b.size() && a[i + poz] == b[i] ) { | ~~^~~~~~~~~~ main.cpp:53:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 53 | return i == b.size(); | ~~^~~~~~~~~~~ main.cpp: In function 'int search(std::string&, std::string&)': main.cpp:63:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 63 | while ( i < query.size() && ans < NMAX ) { | ~~^~~~~~~~~~~~~~ main.cpp:57:48: warning: unused variable 'code_add' [-Wunused-variable] 57 | int code_query, code_pattern, pow, i, ans, code_add; | ^~~~~~~~