#include <stdio.h>

int happy(int month, int day){
	int j;
	int num10 = 0;
	int num1 = 0;
	int monthly = 0;
	
	for(j = 1; j <= day; j++){
		num10 = j / 10;
		num1 = j % 10;
		if(month == num10 + num1) monthly++;
	}
	
	return monthly;
}

int main(){
	int i;
	int result = 0;
	
	for(i = 1; i <= 12; i++){
		if(i == 1 || i == 3 || i == 5 || i == 7 || i == 8 || i == 10 || i == 12){
			result += happy(i, 31);
		}else if(i == 4 || i == 6 || i == 9 || i == 11){
			result += happy(i, 30);
		}else{
			result += happy(i, 28);
		}
	}
	
	printf("%d\n", result);
	
	return 0;
}