Compilare: main.cpp: In function 'int main()': main.cpp:103:12: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 103 | while(j<a.size()&&!sep.empty()) | ~^~~~~~~~~ main.cpp:111:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 111 | for(int i=0;i<a.size();i++) | ~^~~~~~~~~