import appuifw
a = appuifw.query (u"Vvedite A:","float")
b = appuifw.query (u"Vvedite B:","float")
c = appuifw.query (u"Vvedite C:","float")
d = (b*b)-(4*a*c)
if c == 0:
   d = (b*b)-(4*a)
   dis = unicode(d)
   appuifw.note (u"Diskriminant raven " +dis)
elif a == 0:
   appuifw.note (u"Neverno, A = 0")
elif b == 0:
   appuifw.note (u"Neverno, B = 0")
else:
   dis = unicode(d)
   appuifw.note (u"Diskriminant raven "+dis)
if d <= 0:
    appuifw.note(u"D <= 0")