Please subscribe to the official Codeforces channel in Telegram via the link: https://t.me/codeforces_official. ×

F. 2 + 2 != 4
time limit per test
1 second
memory limit per test
256 megabytes
input
standard input
output
standard output

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...

Input

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.

Output

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

Examples
Input
8-7+6-5+4-3+2-1-0
Output
4
Input
2+2
Output
-46
Input
112-37
Output
375