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:
5709 + 8211 + 3945 + 1143 - 7258

Ex Output:
-332


Ex Input:
1589 + 4479 - 6111 - 3158 - 7662

Ex Output:
14041


Ex Input:
3493 - 8784 + 9972 - 3166 - 1430 + 4995

Ex Output:

1906