CF799C Fountains

Arkady想要建 $2$ 座喷泉，他有 $n$ 座可以选的喷泉，$c$ 个金币和 $d$个钻石， 每座喷泉可且仅可用金币或钻石一种货币来买，金币和钻石也不能以任何方式转化。现在要使两座喷泉美丽值总和最大且Arkady能买得起，求出最大美丽值。

第一行 $3$ 个数，$n$ ，$c$，$d$ $(2

输出一行一个正整数，即两座喷泉的最大美丽值总和。

In the first example Arkady should build the second fountain with beauty $ 4 $ , which costs $ 3 $ coins. The first fountain he can't build because he don't have enough coins. Also Arkady should build the third fountain with beauty $ 5 $ which costs $ 6 $ diamonds. Thus the total beauty of built fountains is $ 9 $ . In the second example there are two fountains, but Arkady can't build both of them, because he needs $ 5 $ coins for the first fountain, and Arkady has only $ 4 $ coins.