#include <iostream>
#include<fstream>
using namespace std;
int a[1001];

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

    int n,v,litri=0,k=0,answer=0;
    cin>>n;
    cin>>v;
    for(int i=1;i<=n;i++)
    {
        cin>>a[i];
        litri=litri+a[i];
    }
    while(k<litri)
    {
        k=k+v;
        answer++;
    }
    cout<<answer<<endl;
    return 0;
}