#include <iostream>
#include <queue>
#include <algorithm>
#include <map>
using namespace std;

int main()
{
    int n, x;
    cin >> n >> x;
    int niza[n];
    for(int i = 0; i < n; i++) {
        cin >> niza[i];
    }
    int j = 0;
    int sum = 0;
    int maks = 0;
    for(int i = 0; i < n; i++) {
        while(j < n and sum + niza[j] <= x) {
            sum += niza[j];
            j++;
            maks = max(maks, j - i);
        }
        sum -= niza[i];
    }
    cout << maks << endl;
    return 0;
}

/*
 6 55
 12 |13 14 12 11 11|

 */