#include <bits/stdc++.h>

using namespace std;
void fast_io() {
    ios::sync_with_stdio(false);
    std::cin.tie(nullptr);
}

int main() {
    fast_io();
    int n, m;
    cin >> n >> m;
    long long ans = 9e18;
    vector<long long> a(n);
    for (int i = 0; i < n; i++) {
        cin >> a[i];
    }
    for (int i = 0; i <= n - 2; i++) {
        a[i + 1] += a[i];
    }
    for (int i = 0; i < n; i++) {
        ans = min(ans, a[i] / ((long long)(i + 1) * m));
    }
    cout << ans << endl;
}