Compilare: user.cpp: In function ‘void querry()’: user.cpp:56:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < vct.size()-1; ++i) ^ user.cpp:57:42: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = i+1;j < vct.size(); ++j) ^ user.cpp: In function ‘int dist(std::string, std::string)’: user.cpp:18:1: warning: control reaches end of non-void function [-Wreturn-type] } ^