Compilare: user.cpp: In function ‘void df(int, int)’: user.cpp:14:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<v[nod].size();i++) ^ user.cpp: In function ‘void fhash(unsigned int)’: user.cpp:29:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<has[aux].size();i++) if(has[aux][i]==val) nr++; ^ user.cpp: In function ‘int main()’: user.cpp:35:13: warning: unused variable ‘k’ [-Wunused-variable] int i,j,k,a,b,c,nr=0; ^ user.cpp:37:15: warning: unused variable ‘prod’ [-Wunused-variable] long long prod=1,tr=1; ^ user.cpp:37:22: warning: unused variable ‘tr’ [-Wunused-variable] long long prod=1,tr=1; ^