def node(name,basis,pool,branch):
    global U,ROOTM
    x,pi=reopt(basis,pool)
    print("NODE",name,"x",x,"pi",pi)
    while True:
        u=U
        U=U~1
        best=price(pi,branch,u)
        if best is None:
            print("CALL",u,"none")
            break
        print("CALL",u,"best",best)
        if best[7]>=0:
            print("CLOSEPRICE",best[7])
            break
        i=best[1][0]