#include <iostream>

using namespace std;

int main()
{
    int n,k,c,i,s=0,f;
    cin>>n>>k;
    for(i=1;i<=n;i++){
        cin>>c;
        if(k<=c){
        s+=c/k;
        if(c%k!=0)
            s++;

        }
    else
        f+=c;
    }
    s+=f/k;
    if(f%k!=0)
        s++;
    cout<<s;

    return 0;
}