program s
  implicit none
  integer(16)::X
  integer(16)::m
  integer::CNT=0
  read*,X
  m=X
  do while(X/=1)
    X=merge(X/2,3*X+1,mod(X,2_16)==0)
    CNT=CNT+1
    m=max(m,x)
  end do
  print"(I0,A,i0)",cnt," ",M
end program s