Compilare: main.cpp: In function 'int main()': main.cpp:23:12: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 23 | while (i < c.size()) { | ~~^~~~~~~~~~ main.cpp:38:32: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 38 | for (int i = b.size() + 1; i < c.size(); i++) { | ~~^~~~~~~~~~ main.cpp:45:12: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 45 | while (i < c.size()) { | ~~^~~~~~~~~~ main.cpp:60:32: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 60 | for (int i = b.size() + 1; i < c.size(); i++) { | ~~^~~~~~~~~~ main.cpp:69:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 69 | for (int i = 1; i <= b.size() / 2; i++) | ~~^~~~~~~~~~~~~~~