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:
1471 - 7798 + 6514 + 8053 + 9926

Ex Output:
-15224


Ex Input:
6562 - 9064 - 1127 + 8483 + 5128 + 3972 - 4330 + 908 - 7990

Ex Output:
10582


Ex Input:
8600 - 7082 + 49 + 8639 - 7036

Ex Output:

14030