#include<stdio.h>
int main(){
    int one,ten,hundred,thousand,k=0;
    for(int i=1;i<=2019;i++){
        one = i%10;
        ten = i/10%10;
        hundred = i/100%10;
        thousand = i/1000;
        if(one==9||ten==9||hundred==9||thousand==9) k++;
    }printf("%d\n",k);
}