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:
7403 - 3327 + 5889 + 1034 + 1607 - 313

Ex Output:
2513


Ex Input:
6091 - 9741 + 8943 + 4033 - 2984 + 4984 + 8503

Ex Output:
-7647


Ex Input:
8683 + 4323 + 4408 - 9219

Ex Output:

9171