#include <stdio.h>
int isTrue(int num)
{
    int result = num;
    while(result!=0)
    {
        int wei = result%10;
        if(wei==9)
            return 1;
        result = result / 10;
    }
    return 0;
}
int main() 
{
    int i;
    int count = 0;
    for(i = 1;i<=2019;i++)
    {
        if(isTrue(i)==1)
            count++;
    }
    printf("%d",count);
    
    return 0;
}