Problem Statement

Find $\displaystyle \sum_{k=0}^{10^{100}} \left \lfloor \frac{X}{10^k} \right \rfloor$.

Input

Input is given from Standard Input in the following format:
X

Output

Print the answer as an integer.
Here, the answer must be precisely printed as an integer, even if it is large. It is not allowed to use exponential notation, such as 2.33e+21, or print unnecessary leading zeros, as in 0523.

Constraints

• X is an integer.
• $1 \le X < 10^{500000}$

Sample Input 1

1225

Sample Output 1

1360

The value we seek is $1225+122+12+1+0+0+\dots+0=1360$.

Sample Input 2

99999

Sample Output 2

111105

Beware of carries.

Sample Input 3

314159265358979323846264338327950288419716939937510

Sample Output 3

349065850398865915384738153697722542688574377708317

The values in input and output can both be enormous.

见题面 Input 部分

见题面 Output 部分