#include <bits/stdc++.h>
using namespace std;
using ll = long long;
#define rep(i, n) for (int i = 0; i < (int)(n); i++)

int main() {
    cin.tie(nullptr);
    ios_base::sync_with_stdio(false);
    ll n, s;
    cin >> n >> s;
    vector<ll> a(n);
    rep(i, n) cin >> a[i];
    sort(a.rbegin(), a.rend());
    s--;
    ll l = 0, r = 1 << 30;
    while (l + 1 != r) {
        ll c = (l + r) / 2;
        bool ok = true;
        ll x = s;
        ll cnt = c;
        for (ll i : a) {
            if (c >= i)
                continue;
            if (i > s) {
                ok = false;
                break;
            }
            if (cnt == c) {
                x -= i;
                cnt = 1;
            } else {
                cnt++;
            }
        }
        if (x < 0)
            ok = false;
        if (ok) {
            r = c;
        } else {
            l = c;
        }
    }
    cout << r << endl;
    return 0;
}