Compilare: user.cpp: In function ‘int main()’: user.cpp:23:12: warning: unused variable ‘j’ [-Wunused-variable] int i, j; ^ user.cpp: In function ‘void Adauga(int)’: user.cpp:50:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while ( H < s.size() ) ^ user.cpp:57:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if ( poz >= a[x].size() ) ^