billAm = io.read("*n")
if(billAm>=200 and billAm<=999)
then
    discount = billAm/20
    payAm = billAm-discount
    print('The amount you have to pay=',payAm)
elseif(billAm>=1000 and billAm<=4999)
then
    discount = billAm/10
    payAm = billAm-discount
    print('The amount you have to pay=',payAm)
elseif(billAm>=5000)
then
    discount1 = billAm/10
    discount2 = billAm/20
    discount = discount1+discount2
    payAm = billAm-discount
    print('The amount you have to pay=',payAm)
else
    print('The amount you have to pay=',billAm)
end