Compilare: user.cpp: In function ‘int main()’: user.cpp:43:41: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (l=0;l<grup[k].size() && ok;++l) ^ user.cpp:63:47: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (k=0;k<fe[reunit[j]].size();++k) ^ user.cpp:68:53: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (k=0;k<grup[reunit[j]].size();++k) ^ user.cpp:71:61: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (l=0;l<grup[reunit[0]].size();++l) ^ user.cpp:84:53: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (l=0;l<grup[reunit[0]].size();++l) ^ user.cpp:100:18: warning: unused variable ‘da’ [-Wunused-variable] bool da; ^ user.cpp:123:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (l=0;l<fe[k].size();++l) ^