A positive integer
N is passed as the input. If we print all the numbers from 1 to N continuosly,
the program must find the number of characters(digits) C printed and print the
count C as the output.
Input
Format:
The first line
contains N.
Output
Format:
The first line
contains C.
Boundary
Conditions: 1 <= N <= 9999999
Example
Input/Output 1:
Input:
2
Output:
2
Explanation:
We print 12 and
hence the total number of characters is 2.
Solution:
n,c,i=int(input()),0,1
while i<=n:
c+=n-i+1
i*=10
print(c)