#include<iostream>
using namespace std;
int a[10000];
int main()
{
	int n, m, sum = 0, count = 0;
	cin >> n >> m;
	for (int i = 0; i < n; i++)
	{
		cin >> a[i];
		sum += a[i];
		if (sum >= m)
		{
			if (sum == m)
			{
				sum = 0;
			}
			else {
				sum = 0;
				sum += a[i];
			}
			count++;
		}
	}
	cout << count << endl;
	return 0;
}