Compilare: main.cpp: In function 'std::string reverseS(std::string)': main.cpp:38:20: 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=0; i<s.size(); i++) | ~^~~~~~~~~ main.cpp: In function 'std::string reverseS2(std::string)': main.cpp:48:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 48 | for (int i=0; i<s.size()-1; i++) | ~^~~~~~~~~~~ main.cpp: In function 'std::string dezarhivare(std::string)': main.cpp:60:13: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 60 | while (i<A.size()) | ~^~~~~~~~~