#include<stdio.h>
int count();
int main(){
	int month, day, happy;
	for(month = 1 ; month < 12 ; month++){
		if(month == 1 || month == 3 || month == 7 || month == 8 || month == 10 || month == 12){
			for(day = 1 ; day < 31 ; day++){
				happy += count(month, day);
			}
		}else if(month == 2){
			for(day = 1 ; day < 28 ; day++){
				happy += count(month, day);
			}
		}else{
			for(day = 1 ; day < 30 ; day++){
				happy += count(month, day);
			}
		}
	}
	printf("%d\n", happy);
}
int count(int m, int d){
	int count = 0;
	if(d >= 10){
		if(m == d/10 + d%10){
			count++;
		}
	}else if(m == d){
		count++;
	}
	return count;
}