Compilare: user.cpp: In function ‘int main()’: user.cpp:34:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(k=0;k<G[nod].size();k++) ^ user.cpp:19:15: warning: unused variable ‘j’ [-Wunused-variable] int n,m,i,j,k,a,b,c; ^