#include <stdio.h>
#include <stdlib.h>

unsigned int get_num_digit(long long x) {
    unsigned long long abs_x = abs(x);
    unsigned int num_digit = 0;

    do {
        abs_x = abs_x / 10;
        num_digit++;
    } while (abs_x > 0);

    return num_digit;
}

int main(void){
	long long val = 0;
	scanf("%lld",&val);
	
	int digit = get_num_digit(val);
	
	if(digit > 10){
		printf("%d",digit - 10);
	}else{
		printf("%d",10 - digit);
	}
	
	
}