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

#define int long long

signed main(void) {
	ios::sync_with_stdio(false);
	cin.tie(nullptr);
	
	int N, V;
	cin >> N >> V;
	vector<int> C(N);
	for(int i = 0; i < N; ++i) cin >> C[i];
	
	vector<int> S(N + 1, 0);
	for(int i = 0; i < N; ++i) S[i + 1] = S[i] + C[i];
	
	if(V <= N) {
		cout << S[N] << endl;
		return 0;
	}
	V -= N;
	
	int k = 1;
	for(int i = 2; i <= N; ++i) if(S[k] * i < S[i] * k) k = i;
	
	const int M = 12000;
	vector<int> dp(M, 1e18);
	dp[0] = 0;
	for(int i = 1; i <= N; ++i) for(int j = 0; j + i < M; ++j) dp[j + i] = min(dp[j + i], dp[j] + S[i]);
	
	int t = max(0LL, (V - 11000) / k);
	cout << S[k] * t + dp[V - k * t] + S[N] << endl;
	return 0;
}