Compilare: main.cpp: In function 'void DF(int)': main.cpp:19:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0; i<L[nod].size();i++) ~^~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:29:10: warning: unused variable 'k' [-Wunused-variable] int i,k=0,x,y,j; ^ main.cpp:29:18: warning: unused variable 'j' [-Wunused-variable] int i,k=0,x,y,j; ^