Compilare: main.cpp: In function 'int main()': main.cpp:38:22: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 38 | for(int i = 2; i <= b.size(); i++){ | ~~^~~~~~~~~~~ main.cpp:43:22: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 43 | for(int i = 0; i < a.size(); i++){ | ~~^~~~~~~~~~ main.cpp:51:22: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 51 | for(int i = 1; i <= b.size(); i++){ | ~~^~~~~~~~~~~ main.cpp:56:29: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 56 | for(int i = a.size(); i <= b.size(); i++){ | ~~^~~~~~~~~~~