2 + 2 != 4

题目描述

One very experienced problem writer decided to prepare a problem for April Fools Day contest. The task was very simple - given an arithmetic expression, return the result of evaluating this expression. However, looks like there is a bug in the reference solution...

输入输出格式

输入格式

The only line of input data contains the arithmetic expression. The expression will contain between 2 and 10 operands, separated with arithmetic signs plus and/or minus. Each operand will be an integer between 0 and 255, inclusive.

输出格式

Reproduce the output of the reference solution, including the bug.

输入输出样例

输入样例 #1

8-7+6-5+4-3+2-1-0

输出样例 #1

4

输入样例 #2

2+2

输出样例 #2

-46

输入样例 #3

112-37

输出样例 #3

375

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