#include <iostream>
#include <array>

using namespace std;

int func(unsigned int a, unsigned int b);

int main() {
    array<int, 12> days {31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};
    int answer;

    for ( unsigned int i = 0; i < days.size(); ++i ) {
        answer += func((i+1), days.at(i));
    }

    cout << answer << endl;

    return 0;
}

int func(unsigned int a, unsigned int b) {
    int happyDays = 0;
    for ( unsigned int j = 1; j <= b; ++j) {
        unsigned int c = ( j / 10) + ( j % 10);
        if ( a == c ) ++happyDays;
    }
    return happyDays;
}