import java.util.Scanner;

public class Sum1s

{

public static void main(String[] args)

{

Scanner keyboard = new Scanner(System.in);

int data = keyboard.nextInt();

int result = sum1s(data);

System.out.println("result = " + result);

}

public static int sum1s(int n)

{

int iCount = 0;

int iFactor = 1;

int iLowerNum = 0;

int iCurrNum = 0;

int iHigherNum = 0;

while(n/iFactor != 0)

{

iLowerNum = n - (n/iFactor)*iFactor;

iCurrNum = (n/iFactor)%10;

iHigherNum = n / (iFactor*10);

switch (iCurrNum)

{

case 0:

iCount += iHigherNum * iFactor;

break;

case 1:

iCount += iHigherNum * iFactor + iLowerNum + 1;

break;

default:

iCount += (iHigherNum + 1)*iFactor;

break;

}

iFactor *= 10;

}

return iCount;

}

}