Vanya got an important task — he should enumerate books in the library and label each book with its number. Each of the *n* books should be assigned with a number from 1 to *n*. Naturally, distinct books should be assigned distinct numbers.

Vanya wants to know how many digits he will have to write down as he labels the books.
The first line contains integer *n* (1 ≤ *n* ≤ 10<sup class="upper-index">9</sup>) — the number of books in the library.
# coding=utf-8
x=input()
for i in range(len(x)):
    if x[i]=='0':
        print('000,end='')
    if x[i]=='1':
        if i==0:
            print('1',end='')
        else:
            print('001',end='')
    if x[i]=='2':
        if i==0:
            print('10',end='')
        else:
            print('010',end='')
    id x[i]=='3':
        if i==0:
	   	  	  					 	 	 		   	   	