#include <bits/stdc++.h>
using namespace std;

int main() {
    int n; cin >> n;
    int money; cin >> money;
    vector<int> days(n);
    for (int i = 0; i < n; i++) {
        cin >> days[i];
    }

    int maxLength = 0;
    int sum = 0;
    int left = 0;

    for (int right = 0; right < n; right++) {
        sum += days[right];
        while (sum > money) {
            sum -= days[left];
            left++;
        }
        maxLength = max(maxLength, right - left + 1);
    }

    cout << maxLength << endl;
}