program main
  implicit none
  character*13::input
  integer::x,y,op,len
  read *,input
  len = LEN_TRIM(input)
  op = find_op(input,len)
  read (input(1:op-1)  ,*), x
  read (input(op+1:len),*), y
  if(input(op:op).eq.'+') then
     print '(i0)',x-y
  else
     print '(i0)',x+y
  end if
contains
  function find_op(input,len) result(op)
    integer::op,len,i
    character*13::input
    do i=2,len
       if(input(i:i).eq.'+'.or.input(i:i).eq.'-') then
          op = i
          return
       end if
    end do
  end function find_op
end program main