#include <iostream>
#include <vector>
using namespace std;
int main()
{
    cin.tie(nullptr);
    cout.tie(nullptr);
    ios_base::sync_with_stdio(false);
    int n, k; cin >> n >> k;
    vector<int> vec;
    for (size_t i = 0; i < n; i++)
    {
        int a; cin >> a;
        vec.push_back(a);
    }
    int i = 0, j = 0, s = 0, m = -1;
    for ( j = 0; j < n; j++)
    {
        if (s + vec[j] <= k)
        {
            s += vec[j];
            i++;
        }
        else if (s != 0)
        {
            s -= vec[j - i];
            s += vec[j];
        }
        m = max(m, i);
    }
    cout << m << endl;
    return 0;
}
/*
8 10
3 6 4 2 3 7 2 9
-7
*/