#include <bits/stdc++.h>

using namespace std;

int main()
{
    freopen ("buckets.in", "r", stdin);
    freopen ("buckets.out", "w", stdout);

    int n, v, s, a;

    cin >> n >> v;

    s = 0;

    for (int i = 0; i < n; ++ i)
    {
        cin >> a;

        s += a;
    }

    if (s % v != 0)
    {
        s += v;
    }

    cout << s / v << endl;

    fclose(stdout);

    return 0;
}