Compilare: user.cpp: In function ‘void eulerian(int)’: user.cpp:25:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<v[nod].size();i++) ^ user.cpp: In function ‘int main()’: user.cpp:74:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(st.size()==n) ^ user.cpp:42:13: warning: unused variable ‘j’ [-Wunused-variable] int n,i,j,x,y,ok=0; ^