Compilare: main.cpp: In function 'void make_arbore(long long int)': main.cpp:28:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(long long i=0;i<v[nod].size();i++) ~^~~~~~~~~~~~~~ main.cpp: In function 'long long int solve(long long int)': main.cpp:44:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(long long i=0;i<V[nod].size();i++) ~^~~~~~~~~~~~~~ main.cpp:106:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^