Compilare: user.cpp: In function ‘int main()’: user.cpp:32:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i = 0; i < v.size(); i++) { ~~^~~~~~~~~~ user.cpp:53:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(v.size()>=1){for(i=0;i<v.size();i++)if(v[i]!=0)fout<<v[i]<<" ";} ~^~~~~~~~~ user.cpp:10:7: warning: unused variable ‘done’ [-Wunused-variable] bool done = false; ^~~~