#include <iostream>
using namespace std;
int main()
{
	// 7 15   8 6 4 2 5 3 3

	int total_truc=0;
	int total_weight=0;
	while(true)
	{
		int integer,weight;
		cin>>integer>>weight;
		if(integer==0 && weight==0)
		{
			break;
		}
		int number;
		int i;
		for(i=0;i<integer;i++)
		{
			cin>>number;
			total_weight=total_weight+number;
			if(total_weight>weight)
			{
				total_truc++;
				total_weight=number;
			}

		}
		cout<<total_truc+1<<endl;
		total_truc==0;
		total_weight==0;
	}


}