// nt sipalya.cpp : This file contains the 'main' function. Program execution begins and ends there.
//
#include <vector>
#include <iostream>

using namespace std;


int main()
{
	cin.sync_with_stdio(false);
	cin.tie(nullptr);
	int days, money;
	
	cin >> days >> money;
	vector<int> listS(days);
	for (size_t i = 0; i < days; i++)
	{
		cin >> listS[i];
	}
	int l = 0, r = 0;
	int max_hossz = 0, aktual, penz = listS[0];

	while (l < days - max_hossz) {
		while (penz + listS[r + 1] <= money) {
			r++;
			penz += listS[r];
		}
		aktual = r - l + 1;
		if (max_hossz < aktual) {
			max_hossz = aktual;
		}
		
		penz -= listS[l];
		l++;
	}
	cout << max_hossz << '\n';
}