Compilare: main.cpp: In function 'int string_compression(std::__cxx11::string)': main.cpp:9:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0; i<s.size(); i++) ~^~~~~~~~~ main.cpp:13:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (s[i]==con && i<s.size()) ~^~~~~~~~~ main.cpp: In function 'int main()': main.cpp:58:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(n<s.size()) ~^~~~~~~~~