// No.188 HAPPY DAY
// https://yukicoder.me/problems/no/188
//

#include <iostream>
#include <iomanip>
using namespace std;

bool is_happy_day(int mm, int dd);

int main() {
    int hit = 0;
    for (auto mm = 1; mm <= 12; mm++) {
        for (auto dd = 1; dd <= 31; dd++) {
            if (mm == 4 || mm == 6 || mm == 9 || mm == 11) {
                if (dd > 30)
                    continue;
            } else if (mm == 2) {
                if (dd > 28)
                    continue;
            }
            if (is_happy_day(mm, dd)) {
                // cout << mm << "/" << dd << endl;
                hit++;
            }
        }
    }

    cout << hit << endl;
}

bool is_happy_day(int mm, int dd) {
    int dd_total = 0;
    while (dd > 0) {
        dd_total += (dd % 10);
        dd /= 10;
    }
    return mm == dd_total;
}