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A10462 | $Rebus$

时间限制1s

内存限制256MB

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题目描述

You are given a rebus of form ? + ? - ? + ? = n, consisting of only question marks, separated by arithmetic operation '+' and '-', equality and positive integer $n$ . The goal is to replace each question mark with some positive integer from $1$ to $n$ , such that equality holds.

输入格式

The only line of the input contains a rebus. It's guaranteed that it contains no more than $100$ question marks, integer $n$ is positive and doesn't exceed $1000000$ , all letters and integers are separated by spaces, arithmetic operations are located only between question marks.

输出格式

The first line of the output should contain "Possible" (without quotes) if rebus has a solution and "Impossible" (without quotes) otherwise. If the answer exists, the second line should contain any valid rebus with question marks replaced by integers from $1$ to $n$ . Follow the format given in the samples.

输入输出样例

输入 #1

? + ? - ? + ? + ? = 42

输出 #1

Possible
9 + 13 - 39 + 28 + 31 = 42

输入 #2

? - ? = 1

输出 #2

Impossible

输入 #3

? = 1000000

输出 #3

Possible
1000000 = 1000000

C++ 编辑器

输入

输出