#include <bits/stdc++.h>
using namespace std;
#define ll long long int
#define rep(i,n) for( int i = 0; i < n; i++ )
#define dump(x)  cerr << #x << " = " << (x) << endl;
#define INF 2000000000
#define mod 1000000007
#define INF2 1000000000000000000

int day(int a, int b) {
    int B = 0;
    while(b > 0) {
        B += b % 10;
        b /= 10;
    }
    if (a == B) return 1;
    else return 0;
}

int month(int a, int b) {
    int cnt = 0;
    rep(i, b) cnt += day(a, i+1);
    return cnt;
}

int main(void)
{
    cin.tie(0);
    ios::sync_with_stdio(false);

    int cnt = 0;
    cnt += month(1, 31);
    cnt += month(2, 28);
    cnt += month(3, 31);
    cnt += month(4, 30);
    cnt += month(5, 31);
    cnt += month(6, 30);
    cnt += month(7, 31);
    cnt += month(8, 31);
    cnt += month(9, 30);
    cnt += month(10, 31);
    cnt += month(11, 30);
    cnt += month(12, 31);
    cout << cnt << endl;

    return 0;
}