#include<stdio.h>
int main(void){
    int X,Y,sum;
    sum=0;
    for(X=1;X<=12;X++){
        switch(X){
    case 2:
    for(Y=1;Y<=28;Y++){
        if(X=(Y/10)+(Y%10)){
            sum+=1;
        }
    }
    break;
    
    case 4:
    case 6:
    case 9:
    case 11:
    for(Y=1;Y<=30;Y++){
        if(X=(Y/10)+(Y%10)){
            sum+=1;
        }
    }
    break;
    
    case 1:
    case 3:
    case 5:
    case 7:
    case 8:
    case 10:
    case 12:
    for(Y=1;Y<=31;Y++){
        if(X=(Y/10)+(Y%10)){
            sum+=1;
        }
    }
    break;
        }
    }
    printf("%d\n",sum);
    return 0;
}