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:
1562 + 8343 + 8480

Ex Output:
-15261


Ex Input:
3238 + 2914 + 4122

Ex Output:
-3798


Ex Input:
7087 + 5381 - 8025 + 7599 + 1863 - 4773

Ex Output:

5042


