CF1461F.Mathematical Expression

普及/提高-

通过率:0%

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题目描述

Barbara was late for her math class so as a punishment the teacher made her solve the task on a sheet of paper. Barbara looked at the sheet of paper and only saw nn numbers a1,a2,,ana_1, a_2, \ldots, a_n without any mathematical symbols. The teacher explained to Barbara that she has to place the available symbols between the numbers in a way that would make the resulting expression's value as large as possible. To find out which symbols were available the teacher has given Barbara a string ss which contained that information.

It's easy to notice that Barbara has to place n1n - 1 symbols between numbers in total. The expression must start with a number and all symbols must be allowed (i.e. included in ss ). Note that multiplication takes precedence over addition or subtraction, addition and subtraction have the same priority and performed from left to right. Help Barbara and create the required expression!

输入格式

The first line of the input contains a single integer nn ( 1n1051 \le n \le 10^5 ) — the amount of numbers on the paper.

The second line of the input contains nn integers a1,a2,,ana_1, a_2, \ldots, a_n ( 0ai90 \le a_i \le 9 ), where aia_i is the ii -th element of aa .

The third line of the input contains the string ss ( 1s31 \le |s| \le 3 ) — symbols allowed in the expression. It is guaranteed that the string may only consist of symbols "-", "+" and "*". It is also guaranteed that all symbols in the string are distinct.

输出格式

Print nn numbers separated by n1n - 1 symbols — a mathematical expression with the greatest result. If there are multiple equally valid results — output any one of them.

输入输出样例

  • 输入#1

    3
    2 2 0
    +-*

    输出#1

    2*2-0
  • 输入#2

    4
    2 1 1 2
    +*

    输出#2

    2+1+1+2

说明/提示

The following answers also fit the first example: "2+2+0", "2+2-0", "2*2+0".

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