#include <iostream>
using namespace std;
const int N = 1010;
int n, k;
int a[N];
int main()
{
    cin >> n >> k;
    for (int i = 0; i < n; i ++ ) cin >> a[i];
    int res = 0;
    for (int i = 0; i < n; i ++ )
    {
        int j = i, s = 0;
        while (j < n && s < k) s += a[j ++ ];
        res ++ ;
        i = j - 1;
    }
    cout << res << endl;
    return 0;
}