#include <fstream>

using namespace std;

using ll = long long;

const string filename = "secvmaxval";
ifstream fin(filename + ".in");
ofstream fout(filename + ".out");

const int NMAX = 2e5 + 5;

ll v[NMAX], sc, lmax, j;

int main()
{
    ll n, val;
    fin >> n >> val;
    for (ll i = 0; i < n; i++)
    {
        fin >> v[i];
    }
    for (ll i = 0; i < n; i++)
    {
        sc += v[i];
        while (j <= i && sc > val)
        {
            sc -= v[j];
            j++;
        }
        lmax = max(lmax, i - j + 1);
    }
    fout << lmax;
    fin.close();
    fout.close();
    return 0;
}