#include <stdio.h>

int main(void)
{
        char month, ten, one, count = 0;
        char end[12] = {31,28,31,30,31,30,31,31,30,31,30,31};

        for(month = 1; month <= 12; month++){   
                one = 1;
                ten = 0;
                while(end[month - 1] >= (ten * 10) + one){
                        if(one == 10){
                                one = 0;
                                ten++;
                        }
                        if(month > ten + one){
                                one++;
                                continue;
                        }
                        else if(month == ten + one)
                                count++;
                        ten++;
                        one = 0;
                }
        }
        printf("%d\n", count);

        return 0;
}