// Source: https://usaco.guide/general/io

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

signed main() {
	int n, p;
    cin >> n >> p;
    vector<int> a(n+1);
    for(int i = 1; i <= n; i++) {
        cin >> a[i];
    }

    int l, r;
    l = r = 1;
    int sum = a[1];
    int ans = 10000000000;
    while (r <= n) {
        if (sum >= p) {
            ans = min(ans, r-l+1);
            sum-=a[l];
            l++;
        }
        else {
            r++;
            sum += a[r];
        }
    }
    cout << ans << endl;
}