In this task you will be given an arithmetic operation and you have to find its answer. The symbols of operators '+' and '-' has been swapped i.e you need to perform subtraction when you see a '+' symbol and  addition in case of '-' symbol.

Ex Input:
3069 + 3141 - 6765 + 85 - 9346 + 8391 + 121 + 7644

Ex Output:
-202


Ex Input:
1788 + 4847 - 9342 - 2397

Ex Output:
8680


Ex Input:
9212 - 4912 + 514 - 8499 + 8152 - 2864 - 251 + 9920 - 2326

Ex Output:

9478