题目描述 Every positive number can be presented by the exponential form. For example, $137 = 2^7 + 2^3 + 2^0$. Let's present $a^b$ by the form $a(b)$. Then $137$ is presented by $2(7)+2(3)+2(0)$. Since $7 = 2^2 + 2 + 2^0$ and $3 = 2 + 2^0$, $137$ is finally presented by $2(2(2)+2+2(0))+2(2+2(0))+2(0)$. Given a positive number $n$, your task is to present $n$ with the exponential form which only contains the digits $0$ and $2$. 输入格式 For each case, the input file contains a positive integer $n$ ($n \leq 20000$). 输出格式 For each case, you should output the exponential form of $n$ an a single line. Note that, there should not be any additional white spaces in the line. 输入样例 1315 输出样例 2(2(2+2(0))+2)+2(2(2+2(0)))+2(2(2)+2(0))+2+2(0)