Compilare: user.cpp: In function ‘int main()’: user.cpp:51:18: warning: division by zero [-Wdiv-by-zero] return 5%0; ^ user.cpp:73:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0; j<v[nod].size(); ++j) ^ user.cpp:65:13: warning: ‘nod’ may be used uninitialized in this function [-Wmaybe-uninitialized] f[nod]=1; ^ user.cpp:84:17: warning: ‘fiu’ may be used uninitialized in this function [-Wmaybe-uninitialized] f[nod]=1; ^