#include <bits/stdc++.h>
using namespace std;
#define lesgooo ios_base::sync_with_stdio(0), cin.tie(0), cout.tie(0)
#define endl	'\n'
 
signed main()
{
    lesgooo;
    int n, t;
    cin >> n >> t;
    int a[n+1]{};
    for (int i = 1; i <= n; i++) cin >> a[i], a[i]+=a[i-1];
    int l = 0, r = n, md, ans = 0;
    while (l <= r)
    {
        md = (l+r)/2;
        bool valid = 0;
        for (int i = 0; i+md <= n; i++) if (a[i+md]-a[i] <= t) {valid = 1; break;}
        if (valid) ans = max(ans, md), l = md+1;
        else r = md-1;
    }
    cout << ans;
    return 0;
}

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