Compilare: main.cpp: In function 'void descifrare(std::string, int&, std::string&)': main.cpp:36:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 36 | for(int i = 0; i < S.size();){ | ~~^~~~~~~~~~ main.cpp:60:22: 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 = 0; i < str.size();){ | ~~^~~~~~~~~~~~