Compilare: main.cpp: In function 'int main()': main.cpp:28:29: warning: comparison of integer expressions of different signedness: 'll' {aka 'long long int'} and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 28 | for(ll i=1;i<x.size();++i) | ~^~~~~~~~~ main.cpp:34:29: warning: comparison of integer expressions of different signedness: 'll' {aka 'long long int'} and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 34 | for(ll i=0;i<x.size();++i) | ~^~~~~~~~~ main.cpp:63:29: warning: comparison of integer expressions of different signedness: 'll' {aka 'long long int'} and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 63 | for(ll i=1;i<x.size();++i) | ~^~~~~~~~~ main.cpp:69:29: warning: comparison of integer expressions of different signedness: 'll' {aka 'long long int'} and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 69 | for(ll i=0;i<x.size();++i) | ~^~~~~~~~~ main.cpp:81:29: warning: comparison of integer expressions of different signedness: 'll' {aka 'long long int'} and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 81 | for(ll i=1;i<y.size();++i) | ~^~~~~~~~~ main.cpp:87:29: warning: comparison of integer expressions of different signedness: 'll' {aka 'long long int'} and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 87 | for(ll i=0;i<y.size();++i) | ~^~~~~~~~~