int main() {
	int day[12]= {31,28,31,30,31,30,31,31,30,31,30,31}; 
	int count = 0,i,j;
	for(i = 0;i < 12;i++){
		for(j = 0;j<day[i];j++)
			if (((i+1)-(j/10 + j % 10))==0) count++;
	}
	printf("%d",count);
	
}