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


int main(){
    int n;  ll m;   cin >> n >> m;
    vector<ll> a(n);
    for(auto& x : a){
        cin >> x;
    }

    vector<ll> b = a;
    for(int i = 0; i < n - 1; ++i){
        b[i + 1] += b[i];
    }

    ll ans = a[0] / m;
    for(int i = 0; i < n; ++i){
        ll x = b[i] / (m * (i + 1));
        if(ans <= x){
            continue;
        }
        ans = x;
    }
    cout << ans << endl;

    return 0;
}