Compilare: main.cpp: In function 'int main()': main.cpp:34:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 34 | for (int i=0;i<a.size ();++i){ | ~^~~~~~~~~~ main.cpp:43:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 43 | for (int i=0;i<b.size ();++i){ | ~^~~~~~~~~~ main.cpp:44:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 44 | if (i<a.size ()){ | ~^~~~~~~~~~ main.cpp:77:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 77 | for (int i=0;i<rez.size ();++i) fout <<rez[i]<<' '; | ~^~~~~~~~~~~~