Compilare: main.cpp: In function 'std::__cxx11::string f(std::__cxx11::string&, int&)': main.cpp:10:12: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(poz >= s.size()) ~~~~^~~~~~~~~~~ main.cpp:42:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < x.size() - 1; i ++) ~~^~~~~~~~~~~~~~ main.cpp: In function 'int32_t main()': main.cpp:61:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < s.size(); i ++) ~~^~~~~~~~~~