Compilare: user.cpp: In function ‘void dfs(int, int)’: user.cpp:25:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<list[nod].size();++i){ ^ user.cpp: In function ‘int main()’: user.cpp:63:49: warning: unused variable ‘ii’ [-Wunused-variable] int a=0,b=0,c=0,d=0,ii=i,jj=j,kk=k; ^ user.cpp:63:54: warning: unused variable ‘jj’ [-Wunused-variable] int a=0,b=0,c=0,d=0,ii=i,jj=j,kk=k; ^ user.cpp:63:59: warning: unused variable ‘kk’ [-Wunused-variable] int a=0,b=0,c=0,d=0,ii=i,jj=j,kk=k; ^