#include<bits/stdc++.h>
using namespace std;
int main()
{
    freopen("buckets.in","r",stdin);
    freopen("buckets.out","w",stdout);
    int n,k;
    cin>>n>>k;
    int k1,br=0,sum=0;
    for(int i=0;i<n;i++)
    {
        cin>>k1;
        sum+=k1;
        for(;sum>=k;){br++; sum-=k;}
    }
    if(sum) br++;
    cout<<br<<endl;
    return 0;
}