Compilare: main.cpp: In function 'bool invers(std::__cxx11::string, std::__cxx11::string)': main.cpp:22:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < a.size(); i++) ~~^~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:83:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 0; j < linie.size() && bun; j++) ~~^~~~~~~~~~~~~~ main.cpp:134:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 0; j < linie.size(); j++) ~~^~~~~~~~~~~~~~