#include <iostream>
#include <string>

using namespace std;

int main() {
    int Y;
    int sum = 0;
    for (int X = 1; X < 13; X++){
    if (X == 1,3,5,7,8,10,12) {
    for (Y = 1; Y <32; Y++ ){
        if (X == Y % 10 + Y / 10 ) {
            sum++;
        }
        
    }
    }
    if (X == 4,6,9,11) {
        for (Y == 1; Y <31; Y++) {
            if (X == Y % 10 + Y / 10) {
                sum++;
            }
        }
    if (X == 2) {
        for (Y == 1; Y < 29; Y++) {
            if (X == Y % 10 + Y/ 10) {
                sum++;
            }
        }
    }
    }
    }
    cout << sum << endl;
}