#include <stdio.h>
#include <string.h>

int main(void)
{
 int x, y, t, c = 0;
 char buf[20];
 for(x = 0; x <= 9999999; x++)
    {
     sprintf(buf, "%d", x);
     t = 0;
     for(y = 0; y < strlen(buf); y++)
        {
         if(buf[y] == '9') t++;
        }
     if(t == 3) c++;
    }
 printf("total: %d\n", c);
}