#include <stdio.h>

int main(){
    int flag[12] = {1, 2, 1, 0, 1, 0, 1, 1, 0, 1, 0, 1};
    int cnt = 0, month, day;
    int i, j;

    for(i = 0; i < 12; i++){
        if(flag[i] == 0){
            for(j = 0; j < 30; j++){
                month = i + 1;
                day =  (j + 1)/10 + (j + 1)%10;
                if(month == day){
                    cnt++;
                }
            }
        }else if(flag[i] == 1){
            for(j = 0; j < 31; j++){
                month = i + 1;
                day =  (j + 1)/10 + (j + 1)%10;
                if(month == day){
                    cnt++;
                }
            }
        }else if(flag[i] == 2){
            for(j = 0; j < 28; j++){
                month = i + 1;
                day =  (j + 1)/10 + (j + 1)%10;
                if(month == day){
                    cnt++;
                }
            }
        }
    }

    printf("%d\n", cnt);

    return 0;

}