设有n个正整数,将他们连接成一排,组成一个最大的多位整数。例如:n=3时,3个整数13,312,343,连成的最大整数为:34331213。又如:n=4时,4个整数7,13,4,246连接成的最大整数为7424613。

有多组输入，每组数据格式如下：

第一行，一个数n，（1<=n<=20）表示有n 个数要连接；

第二行，n个数。

与输入对应，有多组输出，每组仅有一行，连接成的多位数

输入样例]

3

13 312 343



[输出样例]

34331213-With n positive integers, connect them in a row to form one of the largest number of integers. For example: n = 3, the three integers 13,312,343, and even into the largest integer is: 34331213. Another example: n = 4, the four integers 7,13,4,246 connected into the greatest integer is 7424613. Multiple sets of input, each data format is as follows: the first line, a number n, (1 < = n < = 20) indicated n number to be connected　the second line, n the number. Input corresponding to multiple sets of outputs, each with only one line, connected into a multi-digit input sample] 313312343 [Output Example] 34331213