#914. Evaluate an expression (+, -)
You get an expression like `12+3-4` with no spaces. Find its value (without eval).
### Input
One line.
### Output
A number.
Examples
Input
59+5-63-86+60-90
Output
-115
Input
48-75-16-90-41+64-48
Output
-158
💡 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.