Compilare: user.cpp: In function ‘void expand(std::tuple<int, int>&, std::vector<int>&, std::__cxx11::string&)’: user.cpp:132:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(getm(seq,0) == 0 || getm(seq,1) == s.length()-1)return; ^ user.cpp:139:44: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(getm(seq,0) == 0 || getm(seq,1) == s.length()-1)return; ^