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F. 2 + 2 != 4

time limit per test

1 secondmemory limit per test

256 megabytesinput

standard inputoutput

standard outputOne 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

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