#include <iostream>
using namespace std;
int main() {
    int N, ans = 0, b = 0;
    cin >> N;
    for (int i = 0; i < N; i++) {
        int a;
        cin >> a;
        if (a % 2) b--;
        else a++;
        ans += (21 - a + b);
    }
    cout << ans;
}

为啥10分？？