Russian version:
"Клиенты нумеруются в порядке поступления."

English version:
"The clients are numbered in the the order that they arrive, i.e. the clients number is the number d in the input."

I've read russian one. Have got WA 6.
Than I've read english one. And have got AC.
So, IMHO, english statement is more informative. :(

(Russian version may mean following: only accepted clients are numbered).

Both English and Russian versions were updated. Are they OK now?