Compilare: main.cpp: In function 'int main()': main.cpp:72:34: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 72 | for(int i=((a%k)-1);i<s.size();i++) | ~^~~~~~~~~