现在有一个简单游戏：给你一行n个整数，要求你在两两之间放入“+”、“-”、“*”、“/”等符号共n-1个，使得表达式计算结果最大且不包含数字k-Now there is a simple game: give you a line of n integers, ask you to add+-*/etc between the two symbols, a total of n- 1, makes the expression calculation results and does not i