#include <iostream>
#include <cstring>
#include <cstdio>
#include <cstdlib>
#include <cmath>

using namespace std;

int a[1000001],ans,n,f,now,nown;

int main()
{
	freopen("tickets.in","r",stdin);
	freopen("tickets.out","w",stdout);
	scanf("%d%d",&n,&f);
	for (int i=1;i<=n;i++)
	{
		scanf("%d",&a[i]);
	}
	int i=1,j=1;
	while (j<=n)
	{
		if (i==j && a[i]>=f) i++,j++;
		else if (now+a[j]<=f) now+=a[j],nown++,j++;
		else {
				 if (ans<nown) ans=nown;
				 now-=a[i];
				 nown--;
				 i++;
			 }
	}
	printf("%d\n",ans);
	return 0;
}