#include <iostream>
#include <vector>

using namespace std;

int main() {
    int bajitalok_szama;
    int x;
    vector<int> bajitalok;

    cin >> bajitalok_szama;
    cin >> x;

    int temp;


    for (int i = 0; i < bajitalok_szama; i++) {
        cin >> temp;

        bajitalok.push_back(temp);
    }

    int megoldas = 0;

    bajitalok[0]--;

    vector<int> temp_list = bajitalok;

    for (int i = 0; i < bajitalok_szama; i++) {
        temp_list[i]--;
        for (int j = 0; j < bajitalok_szama; j++) {
            megoldas += temp_list[j] / x;


        }

        temp_list = bajitalok;

    }

    cout << megoldas;




    return 0;
}