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:
6694 + 8723 - 1592 + 7366 + 9388

Ex Output:
-17191


Ex Input:
8171 + 8357 + 171 - 3129 - 6929

Ex Output:
9701


Ex Input:
3658 + 6122 - 1605 - 5664 - 2085 - 6595 + 4446 - 7698 + 541

Ex Output:

16196