#include <iostream>

bool happy(int day, int month) {
    int sum = 0;
    while(day) {
        sum = day % 10;
        day /= 10;
    }

    if(sum == month) {
        return true;
    } else {
        return false;
    }
}

int main() {
    int sum = 0;
    for(int i = 1; i <= 31; i++) {
        if(happy(i, 1)) {
            sum++;
        }
    }
    for(int i = 1; i <= 28; i++) {
        if(happy(i, 2)) {
            sum++;
        }
    }
    for(int i = 1; i <= 31; i++) {
        if(happy(i, 3)) {
            sum++;
        }
    }
    for(int i = 1; i <= 30; i++) {
        if(happy(i, 4)) {
            sum++;
        }
    }
    for(int i = 1; i <= 31; i++) {
        if(happy(i, 5)) {
            sum++;
        }
    }
    for(int i = 1; i <= 30; i++) {
        if(happy(i, 6)) {
            sum++;
        }
    }
    for(int i = 1; i <= 31; i++) {
        if(happy(i, 7)) {
            sum++;
        }
    }
    for(int i = 1; i <= 31; i++) {
        if(happy(i, 8)) {
            sum++;
        }
    }
    for(int i = 1; i <= 30; i++) {
        if(happy(i, 9)) {
            sum++;
        }
    }
    for(int i = 1; i <= 31; i++) {
        if(happy(i, 10)) {
            sum++;
        }
    }
    for(int i = 1; i <= 30; i++) {
        if(happy(i, 11)) {
            sum++;
        }
    }
    for(int i = 1; i <= 31; i++) {
        if(happy(i, 12)) {
            sum++;
        }
    }

    std::cout << sum << std::endl;
}