#include <bits/stdc++.h>

using namespace std;

namespace {

    typedef double real;
    typedef long long ll;

    template<class T> ostream& operator<<(ostream& os, const vector<T>& vs) {
        if (vs.empty()) return os << "[]";
        os << "[" << vs[0];
        for (int i = 1; i < vs.size(); i++) os << " " << vs[i];
        return os << "]";
    }

    int N;
    ll V;
    vector<ll> C;
    void input() {
        cin >> N >> V;
        C.resize(N);
        for (int i = 0; i < N; i++) cin >> C[i];
    }

    void solve() {
        vector<real> S(N, 0); // [0, k)を1[L]ずつまぜたジュースのk[L]の値段
        S[0] = C[0];
        for (int i = 1; i < N; i++) {
            S[i] = S[i - 1] + C[i];
        }

        ll ans = S[N - 1];
        V -= N;
        for (int k = N - 1; V > 0; ) {
            int j = k;
            real c = S[k] / (k + 1);
            for (int i = 0; i < k; i++) {
                if (S[i] / (i + 1) < c) {
                    j = i;
                    c = S[i] / (i + 1);
                }
            }

            ll x = V / (j + 1);
            ans += x * S[j];
            V -= x * (j + 1);
            k = j - 1;
            //cerr << k << " " << x << endl;
        }

        cout << ans << endl;
    }
}

int main() {
    input(); solve();
    return 0;
}