Compilare: main.cpp: In function 'long long int makehash(const string&)': main.cpp:13:19: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 13 | for (i = 0; i < a.size(); i++) | ~~^~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:60:23: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 60 | for (i = 0; i < a.size() - 1; i++) | ~~^~~~~~~~~~~~~~ main.cpp:65:23: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 65 | for (i = 0; i < b.size() - a.size(); i++) | ~~^~~~~~~~~~~~~~~~~~~~~ main.cpp:53:25: warning: unused variable 'cnt' [-Wunused-variable] 53 | int ha = 0, hb = 0, cnt = 0, i, p = 0; | ^~~