Points: 100
Time limit: 1.0s
Memory limit: 64M

Author:
Problem types
Allowed languages
C, C++, Java, Python

You will be given a valid expression E consisting of " + ", " - " and integers.

Example: "23+56-(100-25)"

It is guaranteed that the given expression is valid and can be calculated.

You task is to evaluate the expression.

Note

• There are no spaces in E

#### Input

A string E consisting of " + ", " - " and integers.

#### Output

The value of the expression

#### Constraints

$$1 \leq$$ E.length $$\leq 3.10^4$$

#### Example

Input

2+5-(3+4)+(2-3)

Output

-1