CF1117B.Emotes

传统题 时间 2000 ms 内存 256 MiB 5 尝试 1 已通过 1 标签

Emotes

There are nn emotes in very popular digital collectible card game (the game is pretty famous so we won't say its name). The ii-th emote increases the opponent's happiness by aia_i units (we all know that emotes in this game are used to make opponents happy).

You have time to use some emotes only mm times. You are allowed to use any emotion once, more than once, or not use it at all. The only restriction is that you cannot use the same emote more than kk times in a row (otherwise the opponent will think that you're trolling him).

Note that two emotes ii and jj (iji \ne j) such that ai=aja_i = a_j are considered different.

You have to make your opponent as happy as possible. Find the maximum possible opponent's happiness.

Input

The first line of the input contains three integers n,mn, m and kk (2n21052 \le n \le 2 \cdot 10^5, 1km21091 \le k \le m \le 2 \cdot 10^9) — the number of emotes, the number of times you can use emotes and the maximum number of times you may use the same emote in a row.

The second line of the input contains nn integers a1,a2,,ana_1, a_2, \dots, a_n (1ai1091 \le a_i \le 10^9), where aia_i is value of the happiness of the ii-th emote.

Output

Print one integer — the maximum opponent's happiness if you use emotes in a way satisfying the problem statement.

Note

In the first example you may use emotes in the following sequence: 4,4,5,4,4,5,4,4,54, 4, 5, 4, 4, 5, 4, 4, 5.

Samples

6 9 2
1 3 3 7 4 2
54
3 1000000000 1
1000000000 987654321 1000000000
1000000000000000000

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