Compilare: main.cpp: In function 'int main()': main.cpp:42:23: 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] 42 | for( i = 1; i < b.size(); i++ ) { | ~~^~~~~~~~~~ main.cpp:49:30: 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] 49 | for( i = a.size(); i <= b.size(); i++ ) { | ~~^~~~~~~~~~~ main.cpp:54:23: 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] 54 | for( i = 0; i < a.size(); i++ ) { | ~~^~~~~~~~~~ main.cpp:59:34: 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] 59 | for( i = a.size() - 1; i < b.size(); i++ ) { | ~~^~~~~~~~~~ main.cpp:65:30: 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] 65 | for( i = a.size(); i <= b.size(); i++ ) { | ~~^~~~~~~~~~~