#670. Even sum - odd sum
Subtract the sum of the odd elements from the sum of the even elements.
### Input
The first line has n, the second line has n integers separated by spaces.
### Output
A number.
Examples
Input
10 -1 -21 -15 36 31 8 3 -16 -40 -6
Output
-15
Input
6 41 36 -36 16 0 17
Output
-42
💡 You can solve it with Python, JavaScript or blocks. Read the input line by line with input(). Don't print a question (like input("Number: ")). Print exactly what the output asks for, nothing more.