#include <iostream>
#include <vector>
#include <algorithm>
using namespace std;

typedef long long ll;

bool func(pair<ll, int> a, pair<ll, int> b){
	if(a.first * b.second == b.first * a.second){
		return a.second < b.second;
	}
	if(a.first * b.second < b.first * a.second){
		return true;
	} else {
		return false;
	}
}

int main(){
	int N;
	ll V;
	cin >> N >> V;

	vector<ll> C(N);
	for(int i=0;i<N;i++)cin >> C[i];

	vector< pair<ll, int> > S(N);
	ll s = 0;
	for(int i=0;i<N;i++){
		s += C[i];
		S[i] = make_pair(s, i + 1);
	}

	sort(S.begin(), S.end(), func);

	ll  res = 0;
	ll  minC = S[0].first;
	int minP = S[0].second;

	res += s;
	V -= N;

	if(V <= 0){
		cout << res << endl;
		return 0;
	}

	res += minC * (V / minP);

	V -= minP * (V / minP);
	for(int i=0;i<V;i++)res += C[i];

	cout << res << endl;
}