#include "bits/stdc++.h"
using namespace std;
#define FOR(i,j,k) for(int (i)=(j);(i)<(int)(k);++(i))
#define rep(i,j) FOR(i,0,j)
#define each(x,y) for(auto &(x):(y))
#define mp make_pair
#define all(x) (x).begin(),(x).end()
#define debug(x) cout<<#x<<": "<<(x)<<endl
#define smax(x,y) (x)=max((x),(y))
#define smin(x,y) (x)=min((x),(y))
#define MEM(x,y) memset((x),(y),sizeof (x))
#define sz(x) (int)(x).size()
typedef long long ll;
typedef pair<int, int> pii;
typedef vector<int> vi;
typedef vector<ll> vll;

typedef tuple<ll, int> T;
bool cmp(T a, T b){
    ll ax, bx;
    int ay, by;
    tie(ax, ay) = a;
    tie(bx, by) = b;
    if(ax*by != bx*ay)return ax*by < bx*ay;
    else return ay < by;
}

ll dp[101 * 103], INF = LLONG_MAX;

int main(){
    int N, V;
    cin >> N >> V;
    vll C(N);
    rep(i, N)cin >> C[i];
    vector<T> vt(N);
    ll sm = 0;
    rep(i, N){
        sm += C[i];
        vt[i] = mp(sm, i + 1);
    }
    sort(all(vt), cmp);
    V -= N;
    ll ans = sm;

    if(V >= 101*N){
        int v = V - 100 * N, n;
        ll cost;
        tie(cost, n) = vt[0];
        ans = v / n*cost;
        v %= n;
        V = 100 * N + v;
    }
    smax(V, 0);
    rep(i, 101*103)dp[i] = INF;
    dp[0] = 0;
    rep(i, N){
        ll cost;
        int n;
        tie(cost, n) = vt[i];
        for(int j = 0; j<V; ++j)if(dp[j]!=INF){
            smin(dp[j + n], dp[j] + cost);
        }
    }
    
    ll mini = LLONG_MAX;
    FOR(i, V, 101 * 103)smin(mini, dp[i]);
    ans += mini;
    cout << ans << endl;
}