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#include<bits/stdc++.h>
#define rep(i,a,b) for(int i=a;i<b;i++)
using namespace std; void _main(); int main() { cin.tie(0); ios::sync_with_stdio(false); _main(); }
//---------------------------------------------------------------------------------------------------



typedef long long ll;
#define rrep(i,a,b) for(int i=a;i>=b;i--)
#define INF 1LL<<60
int N;
ll V, C[101], sm[101], dp[30202];
//---------------------------------------------------------------------------------------------------
void _main() {
    cin >> N >> V;
    rep(i, 0, N) cin >> C[i];
    sm[0] = 0;
    rep(i, 0, N) sm[i + 1] = sm[i] + C[i];
    if (V <= N) {
        cout << sm[N] << endl;
        return;
    }

    V -= N;

    int opt = 1;
    rep(i, 2, N + 1) if (sm[i] * opt < sm[opt] * i) opt = i;

    rep(i, 0, min(20202, (int)V) + 1) {
        dp[i] = INF;
        if ((V - i) % opt == 0) dp[i] = (V - i) / opt * sm[opt];
    }

    rrep(i, min(20202, (int)V), 0) {
        rep(j, 1, N + 1) dp[i] = min(dp[i], dp[i + j] + sm[j]);
    }

    cout << dp[0] + sm[N] << endl;
}