program main
  var a as integer
  var b as integer
  var c as integer
  var d as boolean
  a = a + b * c
  a = a - b - c
  a = a / b / c
  a = (a + b) * c
  a = -a * b
  a = - - a
  d = not d and d
  d = d or d and d
  d = a < b = d
  d = a = b or a <> c and not d
  a = a * b + c * a - b / c
  d = a + b < c * a
  d = a <= b or a >= c
  print (a + b) * -c
  a = a - (b - c)
end program