Compilare: main.cpp: In function 'void calculate_hashes()': main.cpp:16:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 16 | for (int i = 0; i < a.size(); ++i) | ~~^~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:30:30: 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 (int i = a.size(); i < b.size(); ++i) | ~~^~~~~~~~~~ main.cpp:38:35: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 38 | for (int i = 0; i < 1000 && i < result.size(); ++i) | ~~^~~~~~~~~~~~~~~